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1. Ultrasonographic Assessment of the Diaphragm

Author: Taiga Itagaki, Yusuke Akimoto, Takuya Takashima, and Jun Oto
Subjects: diaphragm, inspiratory muscles, diagnostic ultrasonography, diaphragm-protective ventilation, Medicine (General), R5-920
Abstract: Mechanical ventilation injures not only the lungs but also the diaphragm, resulting in dysfunction associated with poor outcomes. Diaphragm ultrasonography is a noninvasive, cost-effective, and reproducible diagnostic method used to monitor the condition and function of the diaphragm. With advances in ultrasound technology and the expansion of its clinical applications, diaphragm ultrasonography has become increasingly important as a tool to visualize and quantify diaphragmatic morphology and function across multiple medical specialties, including pulmonology, critical care, and rehabilitation medicine. This comprehensive review aims to provide an in-depth analysis of the role and limitations of ultrasonography in assessing the diaphragm, especially among critically ill patients. Furthermore, we discuss a recently published expert consensus and provide a perspective for the future.
Published: 2024
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2. Relationships between double cycling and inspiratory effort with diaphragm thickness during the early phase of mechanical ventilation: A prospective observational study.

Author: Taiga Itagaki, Yusuke Akimoto, Yuki Nakano, Yoshitoyo Ueno, Manabu Ishihara, Natsuki Tane, Yumiko Tsunano, and Jun Oto
Subjects: Medicine, Science
Abstract: BackgroundIncreased and decreased diaphragm thickness during mechanical ventilation is associated with poor outcomes. Some types of patient-ventilator asynchrony theoretically cause myotrauma of the diaphragm. However, the effects of double cycling on structural changes in the diaphragm have not been previously evaluated. Hence, this study aimed to investigate the relationship between double cycling during the early phase of mechanical ventilation and changes in diaphragm thickness, and the involvement of inspiratory effort in the occurrence of double cycling.MethodsWe evaluated adult patients receiving invasive mechanical ventilation for more than 48 h. The end-expiratory diaphragm thickness (Tdiee) was assessed via ultrasonography on days 1, 2, 3, 5 and 7 after the initiation of mechanical ventilation. Then, the maximum rate of change from day 1 (ΔTdiee%) was evaluated. Concurrently, we recorded esophageal pressure and airway pressure on days 1, 2 and 3 for 1 h during spontaneous breathing. Then, the waveforms were retrospectively analyzed to calculate the incidence of double cycling (double cycling index) and inspiratory esophageal pressure swing (ΔPes). Finally, the correlation between double cycling index as well as ΔPes and ΔTdiee% was investigated using linear regression models.ResultsIn total, 19 patients with a median age of 69 (interquartile range: 65-78) years were enrolled in this study, and all received pressure assist-control ventilation. The Tdiee increased by more than 10% from baseline in nine patients, decreased by more than 10% in nine and remained unchanged in one. The double cycling indexes on days 1, 2 and 3 were 2.2%, 1.3% and 4.5%, respectively. There was a linear correlation between the double cycling index on day 3 and ΔTdiee% (R2 = 0.446, p = 0.002). The double cycling index was correlated with the ΔPes on days 2 (R2 = 0.319, p = 0.004) and 3 (R2 = 0.635, p < 0.001).ConclusionsDouble cycling on the third day of mechanical ventilation was associated with strong inspiratory efforts and, possibly, changes in diaphragm thickness.
Published: 2022
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3. Change in diaphragm and intercostal muscle thickness in mechanically ventilated patients: a prospective observational ultrasonography study

Author: Nobuto Nakanishi, Jun Oto, Yoshitoyo Ueno, Emiko Nakataki, Taiga Itagaki, and Masaji Nishimura
Subjects: Diaphragm, Intercostal muscle, Atrophy, Ultrasonography, Medical emergencies. Critical care. Intensive care. First aid, RC86-88.9
Abstract: Abstract Background Diaphragm atrophy is observed in mechanically ventilated patients. However, the atrophy is not investigated in other respiratory muscles. Therefore, we conducted a two-center prospective observational study to evaluate changes in diaphragm and intercostal muscle thickness in mechanically ventilated patients. Methods Consecutive adult patients who were expected to be mechanically ventilated longer than 48 h in the ICU were enrolled. Diaphragm and intercostal muscle thickness were measured on days 1, 3, 5, and 7 with ultrasonography. The primary outcome was the direction of change in muscle thickness, and the secondary outcomes were the relationship of changes in muscle thickness with patient characteristics. Results Eighty patients (54 males and 26 females; mean age, 68 ± 14 years) were enrolled. Diaphragm muscle thickness decreased, increased, and remained unchanged in 50 (63%), 15 (19%), and 15 (19%) patients, respectively. Intercostal muscle thickness decreased, increased, and remained unchanged in 48 (60%), 15 (19%), and 17 (21%) patients, respectively. Decreased diaphragm or intercostal muscle thickness was associated with prolonged mechanical ventilation (median difference (MD), 3 days; 95% CI (confidence interval), 1–7 and MD, 3 days; 95% CI, 1–7, respectively) and length of ICU stay (MD, 3 days; 95% CI, 1–7 and MD, 3 days; 95% CI, 1–7, respectively) compared with the unchanged group. After adjusting for sex, age, and APACHE II score, they were still associated with prolonged mechanical ventilation (hazard ratio (HR), 4.19; 95% CI, 2.14–7.93 and HR, 2.87; 95% CI, 1.53–5.21, respectively) and length of ICU stay (HR, 3.44; 95% CI, 1.77–6.45 and HR, 2.58; 95% CI, 1.39–4.63, respectively) compared with the unchanged group. Conclusions Decreased diaphragm and intercostal muscle thickness were frequently seen in patients under mechanical ventilation. They were associated with prolonged mechanical ventilation and length of ICU stay. Trial registration UMIN000031316. Registered on 15 February 2018
Published: 2019
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4. Monitoring of muscle mass in critically ill patients: comparison of ultrasound and two bioelectrical impedance analysis devices

Author: Nobuto Nakanishi, Rie Tsutsumi, Yoshihiro Okayama, Takuya Takashima, Yoshitoyo Ueno, Taiga Itagaki, Yasuo Tsutsumi, Hiroshi Sakaue, and Jun Oto
Subjects: Muscle mass, Ultrasound, Bioelectrical impedance analysis, Fluid balance, Critically ill patients, Medical emergencies. Critical care. Intensive care. First aid, RC86-88.9
Abstract: Abstract Background Skeletal muscle atrophy commonly occurs in critically ill patients, and decreased muscle mass is associated with worse clinical outcomes. Muscle mass can be assessed using various tools, including ultrasound and bioelectrical impedance analysis (BIA). However, the effectiveness of muscle mass monitoring is unclear in critically ill patients. This study was conducted to compare ultrasound and BIA for the monitoring of muscle mass in critically ill patients. Methods We recruited adult patients who were expected to undergo mechanical ventilation for > 48 h and to remain in the intensive care unit (ICU) for > 5 days. On days 1, 3, 5, 7, and 10, muscle mass was evaluated using an ultrasound and two BIA devices (Bioscan: Malton International, England; Physion: Nippon Shooter, Japan). The influence of fluid balance was also evaluated between each measurement day. Results We analyzed 93 images in 21 patients. The age of the patients was 69 (interquartile range, IQR, 59–74) years, with 16 men and 5 women. The length of ICU stay was 11 days (IQR, 9–25 days). The muscle mass, monitored by ultrasound, decreased progressively by 9.2% (95% confidence interval (CI), 5.9–12.5%), 12.7% (95% CI, 9.3–16.1%), 18.2% (95% CI, 14.7–21.6%), and 21.8% (95% CI, 17.9–25.7%) on days 3, 5, 7, and 10 (p
Published: 2019
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5. Reverse triggering induced by endotracheal tube leak in lightly sedated ARDS patient

Author: Taiga Itagaki, Yoshitoyo Ueno, Nobuto Nakanishi, and Jun Oto
Subjects: Medical emergencies. Critical care. Intensive care. First aid, RC86-88.9
Abstract: Abstract Reverse triggering is respiratory entrainment triggered by the ventilator especially seen among heavily sedated patients. We confirmed reverse triggering induced by auto-triggering in lightly sedated patient through an esophageal pressure monitoring. The reverse triggering frequently caused breath stacking with increased tidal volume. Physicians should be aware, even at an optimal level of sedation, that reverse triggering can develop, possibly caused by auto-triggering.
Published: 2018
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6. The Influence of Differences in Solvents and Concentration on the Efficacy of Propofol at Induction of Anesthesia

Author: Yukako Obata, Yushi U. Adachi, Katsumi Suzuki, Taiga Itagaki, Hiromi Kato, Maiko Satomoto, and Yoshiki Nakajima
Subjects: Anesthesiology, RD78.3-87.3
Abstract: Background. Propofol is a popular intravenous anesthetic and varieties of formulations were produced from different laboratories. The present study compared efficacy of propofol of different laboratories and different concentrations (1 and 2%) during induction of anesthesia. Methods. Seventy-five scheduled surgical patients were randomly allocated into three groups. The patients of group D1 received AstraZeneca Diprivan 1% (Osaka, Japan) at a rate of 40 mg kg−1 h−1. Group M1 was given 1% Maruishi (Maruishi Pharmaceutical, Osaka, Japan) and group M2 was given 2% formulation at the same rate of propofol. Achieving hypnosis was defined as failure to open their eyes in response to a verbal command and the venous blood sample was withdrawn. Results. The hypnotic doses of M2 were significantly larger (D1: 91.4±30.9, M1: 90.7±26.7, and M2: 118.4±40.2 mg, resp. (mean ± SD). p
Published: 2016
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7. Repetitive postoperative extubation failure due to dynamic inspiratory airway collapse concomitant with subglottic stenosis in a patient who previously underwent tracheostomy

Author: Yuki Nakano, Yoshitoyo Ueno, Emi Ishitani, Koji Sato, Hiroki Sato, Kazuki Momota, Natsuki Bando, Yusuke Akimoto, Toshiyuki Nunomura, Manabu Ishihara, Natsuki Tane, Taiga Itagaki, Yoshiaki Kitamura, and Jun Oto
Subjects: subglottic stenosis, tracheostomy, General Medicine, postoperative extubation failure, General Biochemistry, Genetics and Molecular Biology
Abstract: Background : This report describes a case of dynamic inspiratory airway collapse concomitant with subglottic stenosis in a patient who previously underwent tracheostomy that led to repeated post-operative extubation failure. Case presentation : A 43-year-old woman who had undergone tracheostomy 25 years previously was admitted to our intensive-care unit (ICU) after coronary artery bypass graft surgery. On postoperative day (POD) 0, she was extubated, but stridor was observed. We suspected upper airway obstruction and she was therefore reintubated. Before reintubation, urgent laryngotracheoscopy revealed dynamic inspiratory airway collapse and obstruction concomitant with subglottic stenosis. Preoperative computed tomography showed mild subglottic stenosis. Although intravenous corticosteroids were administered to prevent tracheal mucosal edema and a cuff leak test was confirmed to be negative, she developed extubation failure on POD6. On POD12, we performed tracheostomy to reduce mechanical irritation from the endotracheal tube. Mechanical ventilation was withdrawn and she discharged from the ICU. On POD33, her tracheostomy tube was removed and she remained clinically asymptomatic. Conclusions : We should be aware of the history of tracheostomy, especially at high tracheostomy sites, even in the absence of respiratory symptoms as risk factors for dynamic inspiratory airway collapse concomitant with subglottic stenosis contributing to repeated respiratory failure after extubation.
Published: 2023

8. Diaphragm-protective mechanical ventilation in acute respiratory failure

Author: Taiga Itagaki and Jun Oto
Published: 2022

9. Weaning from mechanical ventilation in intensive care units across 50 countries (WEAN SAFE): a multicentre, prospective, observational cohort study

Author: Tài, Pham, Leo, Heunk, Giacomo, Bellani, Fabiana, Madotto, Irene, Aragao, Gaëtan, Beduneau, Ewan C, Goligher, Giacomo, Grasselli, Jon Henrik, Laake, Jordi, Mancebo, Oscar, Peñuela, Lise, Piquilloud, Antonio, Pesenti, Hannah, Wunsch, Frank, van Haren, Laurent, Brochard, John G, Laffey, Abrough, Fekri, P Acharya, Subhash, Amin, Pravin, Arabi, Yaseen, Aragao, Irene, Bauer, Philippe, Beduneau, Gaëtan, Beitler, Jeremy, Berkius, Johan, Bugedo, Guillermo, Camporota, Luigi, Cerny, Vladimir, Cho, Young-Jae, Clarkson, Kevin, Estenssoro, Elisa, Goligher, Ewan, Grasselli, Giacomo, Gritsan, Alexey, Mohammadreza Hashemian, Seyed, Hermans, Greet, M Heunks, Leo, Jovanovic, Bojan, Kurahashi, Kiyoyasu, Henrik Laake, Jon, Matamis, Dimitrio, Moerer, Onnen, Molnar, Zsolt, Ozyilmaz, Ezgi, Panka, Bernardo, Papali, Alfred, Peñuelas, Óscar, Perbet, Sébastien, Piquilloud, Lise, Qiu, Haibo, Abdel Razek, Assem, Rittayamai, Nuttapol, Roldan, Rollin, Serpa Neto, Ary, Szuldrzynski, Konstanty, Talmor, Daniel, Tomescu, Dana, Van Haren, Frank, Villagomez, Asisclo, Ali Zeggwagh, Amine, Abe, Toshikazu, Aboshady, Abdelrhman, Acampo-de Jong, Melanie, Acharya, Subhash, Adderley, Jane, Adiguzel, Nalan, Kumar Agrawal, Vijay, Aguilar, Gerardo, Aguirre, Gaston, Aguirre-Bermeo, Hernan, Ahlström, Björn, Akbas, Türkay, Akker, Mustafa, Al Sadeh, Ghamdan, Alamri, Sultan, Algaba, Angela, Ali, Muneeb, Aliberti, Anna, Manuel Allegue, Jose, Alvarez, Diana, Amador, Joaquin, H Andersen, Finn, Ansari, Sharique, Apichatbutr, Yutthana, Apostolopoulou, Olympia, Arellano, Daniel, Arica, Mestanza, Arikan, Huseyin, Arinaga, Koichi, Arnal, Jean-Michel, Asano, Kengo, Asín-Corrochano, Marta, Milagrito Avalos Cabrera, Jesu, Avila Fuentes, Silvia, Aydemir, Semih, Aygencel, Gulbin, Azevedo, Luciano, Bacakoglu, Feza, Badie, Julio, Baedorf Kassis, Elia, Bai, Gabriela, Balaraj, Govindan, Ballico, Bruno, Banner-Goodspeed, Valerie, Banwarie, Preveen, Barbieri, Rosella, Baronia, Arvind, Barrett, Jonathan, Barrot, Loïc, Emilio Barrueco-Francioni, Jesu, Barry, Jeffrey, Bawangade, Harshal, Beavis, Sarah, Beck, Eduardo, Beehre, Nina, Belenguer Muncharaz, Alberto, Bellani, Giacomo, Belliato, Mirko, Bellissima, Agrippino, Beltramelli, Rodrigo, Ben Souissi, Asma, Benitez-Cano, Adela, Benlamin, Mohamed, Benslama, Abdellatif, Bento, Lui, Benvenuti, Daniela, Bernabe, Laura, Bersten, Andrew, Berta, Giacomo, Bertini, Pietro, Bertram-Ralph, Elliot, Besbes, Mohamed, Roberto Bettini, Lisandro, Beuret, Pascal, Bewley, Jeremy, Bezzi, Marco, Bhakhtiani, Lakshay, Bhandary, Rakesh, Bhowmick, Kaushik, Bihari, Shailesh, Bissett, Bernie, Blythe, David, Bocher, Simon, Boedjawan, Narain, M Bojanowski, Christine, Boni, Elisa, Boraso, Sabrina, Borelli, Massimo, Borello, Silvina, Borislavova, Margarita, J Bosma, Karen, Bottiroli, Maurizio, Boyd, Owen, Bozbay, Suha, Briva, Arturo, Brochard, Laurent, Bruel, Cédric, Bruni, Andrea, Buehner, Ulrike, Bulpa, Pierre, Burt, Karen, Buscot, Mathieu, Buttera, Stefania, Cabrera, Jorge, Caccese, Roberta, Caironi, Pietro, Canchos Gutierrez, Ivan, Canedo, Nancy, Cani, Alma, Cappellini, Iacopo, Carazo, Jesu, Pablo Cardonnet, Lui, Carpio, David, Carriedo, Demetrio, Carrillo, Ramón, Carvalho, João, Caser, Eliana, Castelli, Antonio, Castillo Quintero, Manuel, Castro, Heloisa, Catorze, Nuno, Cengiz, Melike, Cereijo, Enrique, Ceunen, Helga, Chaintoutis, Christo, Chang, Youjin, Chaparro, Gustavogcha, Chapman, Carmel, Chau, Simon, Eugenia Chavez, Cecilia, Chelazzi, Cosimo, Chelly, Jonathan, Chemouni, Frank, Chen, Kai, Chena, Ariel, Chiarandini, Paolo, Chilton, Phil, Chiumello, Davide, Chou-Lie, Yvette, Chudeau, Nicola, Cinel, Ismail, Cinnella, Gilda, Clark, Michele, Clark, Thoma, Clementi, Stefano, Coaguila, Lui, Jaspe Codecido, Alexi, Collins, Amy, Colombo, Riccardo, Conde, Juan, Consales, Guglielmo, Cook, Tim, Coppadoro, Andrea, Cornejo, Rodrigo, Cortegiani, Andrea, Coxo, Cristina, Neville Cracchiolo, Andrea, Crespo Ramirez, Mónica, Crova, Philippe, Cruz, José, Cubattoli, Lucia, Çukurova, Zafer, Curto, Francesco, Czempik, Piotr, D'Andrea, Rocco, da Silva Ramos, Fernando, Dangers, Laurence, Danguy des Déserts, Marc, Danin, Pierre-Eric, Dantas, Fabianne, Daubin, Cédric, Dawei, Wu, de Haro, Candelaria, de Jesus Montelongo, Felipe, De Mendoza, Diego, de Pablo, Raúl, De Pascale, Gennaro, De Rosa, Silvia, Decavèle, Maxen, Declercq, Pierre-Loui, Deicas, Alberto, Del Carmen Campos Moreno, María, Dellamonica, Jean, Delmas, Benjamin, Demirkiran, Oktay, Demirkiran, Hilmi, Dendane, Tarek, di Mussi, Rossella, Diakaki, Chrysi, Diaz, Anatilde, Diaz, Willy, Dikmen, Yalim, Dimoula, Aikaterini, Doble, Patricia, Doha, Nagwa, Domingos, Guilherme, Dres, Martin, Dries, David, Duggal, Abhijit, Duke, Graeme, Dunts, Pavel, Dybwik, Knut, Dykyy, Maksym, Eckert, Philippe, Efe, Serdar, Elatrous, Souheil, Elay, Gülseren, S Elmaryul, Abubaker, Elsaadany, Mohamed, Elsayed, Hany, Elsayed, Samar, Emery, Malo, Ena, Sébastien, Eng, Kevin, A Englert, Joshua, Erdogan, Elif, Ergin Ozcan, Perihan, Eroglu, Ege, Escobar, Miguel, Esen, Figen, Esen Tekeli, Arzu, Esquivel, Alejandro, Esquivel Gallegos, Helbert, Ezzouine, Hanane, Facchini, Alberto, Faheem, Mohammad, Fanelli, Vito, Fernanda Farina, Maria, Fartoukh, Muriel, Fehrle, Lutz, Feng, Feng, Feng, Yufeng, Fernandez, Irene, Fernandez, Borja, Lorena Fernandez-Rodriguez, Maria, Ferrando, Carlo, João Ferreira da Silva, Maria, Ferreruela, Mireia, Ferrier, Janet, Jesús Flamm Zamorano, Matia, Flood, Laura, Floris, Leda, Fluckiger, Martin, Forteza, Catalina, Fortunato, Antonella, Frans, Eric, Frattari, Antonella, Fredes, Sebastian, Frenzel, Tim, Fumagalli, Roberto, Andres Furche, Mariano, Fusari, Maurizio, Fysh, Edward, Luis Galeas-Lopez, Juan, Galerneau, Louis-Marie, Garcia, Analía, Fernanda Garcia, María, Garcia, Elisabet, Garcia Olivares, Pablo, Garlicki, Jaroslaw, Garnero, Aude, Garofalo, Eugenio, Gautam, Prabha, Gazenkampf, Andrey, Gelinotte, Stéphanie, Gelormini, Domenico, Ghrenassia, Etienne, Giacomucci, Angelo, Giannoni, Robert, Gigante, Andrea, Glober, Nancy, Gnesin, Paolo, Gollo, Yari, Gomaa, Dina, Gomero Paredes, Rosita, Gomes, Rui, Alejandro Gomez, Raúl, Gomez, Oscar, Gomez, Aroa, Gondim, Louise, Gonzalez, Manuel, Gonzalez, Isabel, Gonzalez-Castro, Alejandro, Gordillo Romero, Orlando, Gordo, Federico, Gouin, Philippe, Graf Santos, Jerónimo, Grainne, Rooney, Grando, Matilde, Granov Grabovica, Sanja, Grasso, Salvatore, Grasso, Rinaldo, Grimmer, Lisa, Grissom, Colin, Gu, Qing, Guan, Xiang-Dong, Guarracino, Fabio, Guasch, Neu, Guatteri, Luca, Gueret, Renaud, Guérin, Claude, Guerot, Emmanuel, Guitard, Pierre-Gilda, Gül, Fethi, Gumus, Ayca, Gurjar, Mohan, Gutierrez, Patricia, Hachimi, Abdelhamid, Hadzibegovic, Adi, Hagan, Samantha, Hammel, Clare, Han Song, Joo, Hanlon, Gabrielle, Heines, Serge, Henriksson, Johanna, Herbrecht, Jean-Etienne, Omar Heredia Orbegoso, Gabriel, Hermon, Andrew, Hernandez, Rosana, Hernandez, Carmen, Herrera, Lui, Herrera-Gutierrez, Manuel, Heunks, Leo, Hidalgo, Juan, Hill, Dianne, Holmquist, Dagmar, Homez, Marcela, Hongtao, Xia, Hormis, Anil, Horner, Daniel, Carmen Hornos, M, Hou, Meihong, House, Stacy, Housni, Brahim, Hugill, Keith, Humphreys, Sally, Humbert, Loui, Hunter, Stephanie, Hwa Young, Lee, Iezzi, Nicola, Ilutovich, Santiago, Inal, Volkan, Innes, Richard, Ioannides, Panagioti, Antonio Iotti, Giorgio, Ippolito, Mariachiara, Irie, Hiromasa, Iriyama, Hiroki, Itagaki, Taiga, Izura, Javier, Izza, Santiago, Jabeen, Rakhshanda, Jamaati, Hamidreza, Jamadarkhana, Sunil, Jamoussi, Amira, Jankowski, Milosz, Alberto Jaramillo, Lui, Jeon, Kyeongman, Jeong Lee, Seok, Jeswani, Deepak, Jha, Simant, Jiang, Liangyan, Jing, Chen, Jochmans, Sébastien, Anders Johnstad, Bror, Jongmin, Lee, Joret, Aurélie, Junhasavasdikul, Detajin, Teresa Jurado, Maria, Kam, Elisa, Kamohara, Hidenobu, Kane, Caroline, Kara, Iskender, Karakurt, Sait, Karnjanarachata, Cherdkiat, Kataoka, Jun, Katayama, Shinshu, Kaushik, Shuchi, Kelebek Girgin, Nermin, Kerr, Kathryn, Kerslake, Ian, Khairnar, Prakash, Khalid, Abidi, Khan, Akram, K Khanna, Ashish, Khorasanee, Reza, Kienhorst, Dieneke, Kirakli, Cenk, Knafelj, Rihard, Kol Kol, Mark, Kongpolprom, Napplika, Kopitko, Csaba, Korkmaz Ekren, Pervin, Kubisz-Pudelko, Agnieszka, Kulcsar, Zoltan, Kumasawa, Junji, Kuriyama, Akira, Kutchak, Fernanda, Labarca, Eduardo, Labat, Françoise, Laborda, César, Alberto Laca Barrera, Manuel, Lagache, Laurie, Landaverde Lopez, Antonio, Lanspa, Michael, Lascari, Valeria, Le Meur, Matthieu, Hwan Lee, Su, Ju Lee, Young, Lee, Jinwoo, Lee, Won-Yeon, Lee, Jarone, Legernaes, Terje, Leiner, Tamaa, Lemiale, Virginie, Leonor, Tiago, M Lepper, Philipp, Li, Dahuan, Li, Hongbin, Li, Oleg, Raquel Lima, Ana, Lind, Dan, Litton, Edward, Liu, Ning, Liu, Ling, Liu, Jialin, Llitjos, Jean-Françoi, Llorente, Beatriz, Lopez, Rodolfo, Elizabeth Lopez, Claudia, Lopez Nava, Claudia, Lovazzano, Pablo, Lu, Min, Lucchese, Francesca, Lugano, Manuela, Lugo Goytia, Gustavo, Luo, Hua, Lynch, Ceri, Macheda, Sebastiano, Hugo Madrigal Robles, Victor, Maurizio Maggiore, Salvatore, Magret Iglesias, Mònica, Malaga, Peter, Mallapura Maheswarappa, Harish, Malpartida, Guillermo, Malyarchikov, Andrey, Mansson, Helena, Manzano, Anaid, Marey, Ismael, Marin, Nathalie, Del Carmen Marin, Maria, Markman, Eliana, Martin, Felix, Martin, Alex, Martin Dal Gesso, Cristina, Martinez, Felipe, Martínez-Fidalgo, Conchita, Martin-Loeches, Ignacio, Mas, Arantxa, Masaaki, Sakuraya, Maseda, Emilio, Massa, Eleni, Mattsson, Anna, Maugeri, Jessica, Mccredie, Victoria, Mccullough, Jame, Mcguinness, Shay, Mckown, Andrew, Medve, László, Mei, Chengqing, Mellado Artigas, Ricard, Mendes, Vitor, Khalaf Ebraheim Mervat, Mohamed, Michaux, Isabelle, Mikhaeil, Michael, Milagros, Olga, Milet, Igor, Teresa Millan, Maria, Minwei, Zhang, Mirabella, Lucia, Mishra, Sanghamitra, Mistraletti, Giovanni, Mochizuki, Katsunori, Moghal, Arif, Mojoli, Francesco, Molin, Alexandre, Montiel, Raquel, Montini, Luca, Monza, Gianmario, Mora Aznar, Maria, Morakul, Sunthiti, Morales, Maria, Moreno Torres, Daniel, Rolando Morocho Tutillo, Diego, Motherway, Catherine, Mouhssine, Doumiri, Mouloudi, Eleni, Muñoz, Tapia, Munoz de Cabo, Carlo, Mustafa, Mohamed, Muthuchellappan, Radhakrishnan, Muthukrishnan, Muraleekrishnan, Muttini, Stefano, Nagata, Isao, Nahar, Dick, Nakanishi, Misuzu, Nakayama, Izumi, Antonio Namendys-Silva, Silvio, Nanchal, Rahul, Nandakumar, Sivakumar, Nasi, Alessandra, Nasir, Kamal, Navalesi, Paolo, Naz Aslam, Tayyba, Nga Phan, Thuy, Nichol, Alistair, Niiyama, Shuhei, Nikolakopoulou, Sofia, Nikolic, Elena, Nitta, Kenichi, Noc, Marko, Nonas, Stephanie, Nseir, Saad, Nur Soyturk, Ayse, Obata, Yukako, Oeckler, Richard, Oguchi, Moe, Ohshimo, Shinichiro, Oikonomou, Marina, Ojados, Agueda, Teresa Oliveira, Maria, Oliveira Filho, Wilson, Oliveri, Carlo, Olmos, Aitor, Omura, Kazuya, Cristina Orlandi, Maria, Orsenigo, Francesca, Ortiz-Ruiz De Gordoa, Laura, Ota, Kei, Ovalle Olmos, Rainier, Öveges, Nándo, Oziemski, Peter, Ozkan Kuscu, Ozlem, Özyilmaz, Ezgi, Pachas Alvarado, Fernando, Pagella, Gonzalo, Palaniswamy, Vijayanand, Luis Palazon Sanchez, Eugenio, Palmese, Salvatore, Pan, Guojun, Pan, Wensen, Papanikolaou, Metaxia, Papavasilopoulou, Theonymfi, Parekh, Ameet, Parke, Rachael, J Parrilla, Francisco, Parrilla, Dácil, Pasha, Taha, Pasin, Laura, Patão, Lui, Patel, Mayur, Patel, Grisma, Kumar Pati, Basanta, Patil, Jayaprakash, Pattnaik, Saroj, Paul, Daniel, Pavesi, Maurizio, Alejandra Pavlotsky, Vanesa, Paz, Graciela, Paz, Enrique, Pecci, Elisabetta, Pellegrini, Carlo, Gabriela Peña Padilla, Andrea, Perchiazzi, Gaetano, Pereira, Tiago, Pereira, Vera, Perez, Manuel, Perez Calvo, Cesar, Perez Cheng, Meisy, Perez Maita, Ronald, Pérez-Araos, Rodrigo, Perez-Teran, Purificación, Perez-Torres, David, Perkins, Gavin, Persona, Paolo, Petnak, Tananchai, Petrova, Marina, Pham, Tai, Philippart, Françoi, Picetti, Edoardo, Pierucci, Elisabetta, Piervincenzi, Edoardo, Pinciroli, Riccardo, Pintado, Maria-Consuelo, Piraino, Thoma, Piras, Stephanie, Piras, Claudio, Pirompanich, Pattarin, Pisani, Luigi, Platas, Enrique, Plotnikow, Gustavo, Porras, Willy, Porta, Virginia, Portilla, Mariana, Portugal, José, Povoa, Pedro, Prat, Gwenael, Pratto, Romina, Preda, Gabriel, Prieto, Isidro, Prol-Silva, Estefania, Pugh, Richard, Qi, Yupeng, Qian, Chuanyun, Qin, Tiehe, Qu, Hongping, Quintana, Teobaldo, Quispe Sierra, Rosari, Quispe Soto, Rocio, Rabbani, Raihan, Rabee, Mohamed, Rabie, Ahmed, Augusta Rahe Pereira, Maria, Rai, Ashish, Raj Ashok, Sundar, Rajab, Mostafa, Ramdhani, Navin, Ramey, Elizabeth, Ranieri, Marco, Rathod, Darshana, Ray, Banambar, Mahmud Redwanul Huq, Shihan, Regli, Adrian, Reina, Rosa, Resano Sarmiento, Natalia, Reynaud, Faustine, Rialp, Gemma, Ricart, Pilar, Rice, Todd, Richardson, Angu, Rieder, Marcelo, Rinket, Martin, Rios, Fernando, Risso Vazquez, Alejandro, Riva, Ivano, Rivette, Monaly, Roca, Oriol, Roche-Campo, Ferran, Rodriguez, Covadonga, 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Maseda, Eleni Massa, Anna Mattsson, Jessica Maugeri, Victoria McCredie, James McCullough, Shay McGuinness, Andrew McKown, László Medve, Chengqing Mei, Ricard Mellado Artigas, Vitor Mendes, Mohamed Khalaf Ebraheim Mervat, Isabelle Michaux, Michael Mikhaeil, Olga Milagros, Igor Milet, Maria Teresa Millan, Zhang Minwei, Lucia Mirabella, Sanghamitra Mishra, Giovanni Mistraletti, Katsunori Mochizuki, Arif Moghal, Francesco Mojoli, Alexandre Molin, Raquel Montiel, Luca Montini (ORCID:0000-0003-4602-5134), Gianmario Monza, Maria Mora Aznar, Sunthiti Morakul, Maria Morales, Daniel Moreno Torres, Diego Rolando Morocho Tutillo, Catherine Motherway, Doumiri Mouhssine, Eleni Mouloudi, Tapia Muñoz, Carlos Munoz de Cabo, Mohamed Mustafa, Radhakrishnan Muthuchellappan, Muraleekrishnan Muthukrishnan, Stefano Muttini, Isao Nagata, Dick Nahar, Misuzu Nakanishi, Izumi Nakayama, Silvio Antonio Namendys-Silva, Rahul Nanchal, Sivakumar Nandakumar, Alessandra Nasi, Kamal Nasir, Paolo Navalesi, Tayyba Naz 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Elizabeth Stevenson, Kristian Strand, Maria Teresa Strano, Slavenka Straus, Chenliang Sun, Rongqing Sun, Venkat Sundaram, Tai SunPark, Elisabeth Surlemont, Yuda Sutherasan, Zsuzsanna Szabo, Christopher Tainter, Akihiro Takaba, Mandy Tallott, Tamasato Tamasato, Zhanhong Tang, Viratch Tangsujaritvijit, Leandro Taniguchi, Daisuke Taniguchi, Fabio Tarantino, Krittika Teerapuncharoen, Susana Temprano, Pierpaolo Terragni, Nicolas Terzi, Anand Thakur, Pongdhep Theerawit, Arnaud W Thille, Matt Thomas, Poungrat Thungtitigul, Martial Thyrault, Nejla Tilouch, Karina Timenetsky, Juna Tirapu, Manuel Todeschini, Roser Tomas, Christian Tomaszewski, Tommaso Tonetti, Alexandre Tonnelier, John Trinder, Konlawij Trongtrakul, Jonathon Truwit, Betty Tsuei, Aiman Tulaimat, Sema Turan, Melda Turkoglu, Sanjeev Tyagi, Alejandro Ubeda, Federica Vagginelli, María Florencia Valenti, Imma Vallverdu, Alisha Van Axel, Ingrid van den Hul, Hans van der Hoeven, Nardo Van Der Meer, Marc Vanhoof, Mónica 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Tao, Yuan, Boyun, Yuangtrakul, Nadwipa, Yumoto, Tetsuya, Yun, Xie, Zakalik, Graciela, Zaki, Ahmad, Zalba-Etayo, Begoña, Zambon, Massimo, Zang, Bin, Zani, Gianluca, Zarka, Jonathan, Maria Zerbi, Simone, Zerman, Avsar, Zetterquist, Harald, Zhang, Jiuzhi, Zhang, Hongwen, Zhang, Wei, Zhang, Guoxiu, Zhang, Weixin, Zhao, Hongsheng, Zheng, Jia, Zhu, Bin, Zumaran, Ronald, Pham, Tài, Madotto, Fabiana, Goligher, Ewan C, Laake, Jon Henrik, Mancebo, Jordi, Peñuelas, Oscar, Pesenti, Antonio, Wunsch, Hannah, van Haren, Frank, Laffey, John G, Fekri Abrough, Subhash P Acharya, Pravin Amin, Yaseen Arabi, Irene Aragao, Philippe Bauer, Gaëtan Beduneau, Jeremy Beitler, Johan Berkius, Guillermo Bugedo, Luigi Camporota, Vladimir Cerny, Young-Jae Cho, Kevin Clarkson, Elisa Estenssoro, Ewan Goligher, Giacomo Grasselli, Alexey Gritsan, Seyed Mohammadreza Hashemian, Greet Hermans, Leo M Heunks, Bojan Jovanovic, Kiyoyasu Kurahashi, Jon Henrik Laake, Dimitrios Matamis, Onnen Moerer, Zsolt Molnar, Ezgi Ozyilmaz, Bernardo Panka, Alfred Papali, Óscar Peñuelas, Sébastien Perbet, Lise Piquilloud, Haibo Qiu, Assem Abdel Razek, Nuttapol Rittayamai, Rollin Roldan, Ary Serpa Neto, Konstanty Szuldrzynski, Daniel Talmor, Dana Tomescu, Frank Van Haren, Asisclo Villagomez, Amine Ali Zeggwagh, Toshikazu Abe, Abdelrhman Aboshady, Melanie Acampo-de Jong, Subhash Acharya, Jane Adderley, Nalan Adiguzel, Vijay Kumar Agrawal, Gerardo Aguilar, Gaston Aguirre, Hernan Aguirre-Bermeo, Björn Ahlström, Türkay Akbas, Mustafa Akker, Ghamdan Al Sadeh, Sultan Alamri, Angela Algaba, Muneeb Ali, Anna Aliberti, Jose Manuel Allegue, Diana Alvarez, Joaquin Amador, Finn H Andersen, Sharique Ansari, Yutthana Apichatbutr, Olympia Apostolopoulou, Daniel Arellano, Mestanza Arica, Huseyin Arikan, Koichi Arinaga, Jean-Michel Arnal, Kengo Asano, Marta Asín-Corrochano, Jesus Milagrito Avalos Cabrera, Silvia Avila Fuentes, Semih Aydemir, Gulbin Aygencel, Luciano Azevedo, Feza Bacakoglu, Julio Badie, Elias Baedorf Kassis, Gabriela Bai, Govindan Balaraj, Bruno Ballico, Valerie Banner-Goodspeed, Preveen Banwarie, Rosella Barbieri, Arvind Baronia, Jonathan Barrett, Loïc Barrot, Jesus Emilio Barrueco-Francioni, Jeffrey Barry, Harshal Bawangade, Sarah Beavis, Eduardo Beck, Nina Beehre, Alberto Belenguer Muncharaz, Giacomo Bellani, Mirko Belliato, Agrippino Bellissima, Rodrigo Beltramelli, Asma Ben Souissi, Adela Benitez-Cano, Mohamed Benlamin, Abdellatif Benslama, Luis Bento, Daniela Benvenuti, Laura Bernabe, Andrew Bersten, Giacomo Berta, Pietro Bertini, Elliot Bertram-Ralph, Mohamed Besbes, Lisandro Roberto Bettini, Pascal Beuret, Jeremy Bewley, Marco Bezzi, Lakshay Bhakhtiani, Rakesh Bhandary, Kaushik Bhowmick, Shailesh Bihari, Bernie Bissett, David Blythe, Simon Bocher, Narain Boedjawan, Christine M Bojanowski, Elisa Boni, Sabrina Boraso, Massimo Borelli, Silvina Borello, Margarita Borislavova, Karen J Bosma, Maurizio Bottiroli, Owen Boyd, Suha Bozbay, Arturo Briva, Laurent Brochard, Cédric Bruel, Andrea Bruni, Ulrike Buehner, Pierre Bulpa, Karen Burt, Mathieu Buscot, Stefania Buttera, Jorge Cabrera, Roberta Caccese, Pietro Caironi, Ivan Canchos Gutierrez, Nancy Canedo, Alma Cani, Iacopo Cappellini, Jesus Carazo, Luis Pablo Cardonnet, David Carpio, Demetrio Carriedo, Ramón Carrillo, João Carvalho, Eliana Caser, Antonio Castelli, Manuel Castillo Quintero, Heloisa Castro, Nuno Catorze, Melike Cengiz, Enrique Cereijo, Helga Ceunen, Christos Chaintoutis, Youjin Chang, Gustavogcha Chaparro, Carmel Chapman, Simon Chau, Cecilia Eugenia Chavez, Cosimo Chelazzi, Jonathan Chelly, Frank Chemouni, Kai Chen, Ariel Chena, Paolo Chiarandini, Phil Chilton, Davide Chiumello, Yvette Chou-Lie, Nicolas Chudeau, Ismail Cinel, Gilda Cinnella, Michele Clark, Thomas Clark, Stefano Clementi, Luis Coaguila, Alexis Jaspe Codecido, Amy Collins, Riccardo Colombo, Juan Conde, Guglielmo Consales, Tim Cook, Andrea Coppadoro, Rodrigo Cornejo, Andrea Cortegiani, Cristina Coxo, Andrea Neville Cracchiolo, Mónica Crespo Ramirez, Philippe Crova, José Cruz, Lucia Cubattoli, Zafer Çukurova, Francesco Curto, Piotr Czempik, Rocco D'Andrea, Fernando da Silva Ramos, Laurence Dangers, Marc Danguy des Déserts, Pierre-Eric Danin, Fabianne Dantas, Cédric Daubin, Wu Dawei, Candelaria de Haro, Felipe de Jesus Montelongo, Diego De Mendoza, Raúl de Pablo, Gennaro De Pascale, Silvia De Rosa, Maxens Decavèle, Pierre-Louis Declercq, Alberto Deicas, María Del Carmen Campos Moreno, Jean Dellamonica, Benjamin Delmas, Oktay Demirkiran, Hilmi Demirkiran, Tarek Dendane, Rossella di Mussi, Chrysi Diakaki, Anatilde Diaz, Willy Diaz, Yalim Dikmen, Aikaterini Dimoula, Patricia Doble, Nagwa Doha, Guilherme Domingos, Martin Dres, David Dries, Abhijit Duggal, Graeme Duke, Pavel Dunts, Knut Dybwik, Maksym Dykyy, Philippe Eckert, Serdar Efe, Souheil Elatrous, Gülseren Elay, Abubaker S Elmaryul, Mohamed Elsaadany, Hany Elsayed, Samar Elsayed, Malo Emery, Sébastien Ena, Kevin Eng, Joshua A Englert, Elif Erdogan, Perihan Ergin Ozcan, Ege Eroglu, Miguel Escobar, Figen Esen, Arzu Esen Tekeli, Alejandro Esquivel, Helbert Esquivel Gallegos, Hanane Ezzouine, Alberto Facchini, Mohammad Faheem, Vito Fanelli, Maria Fernanda Farina, Muriel Fartoukh, Lutz Fehrle, Feng Feng, Yufeng Feng, Irene Fernandez, Borja Fernandez, Maria Lorena Fernandez-Rodriguez, Carlos Ferrando, Maria João Ferreira da Silva, Mireia Ferreruela, Janet Ferrier, Matias Jesús Flamm Zamorano, Laura Flood, Leda Floris, Martin Fluckiger, Catalina Forteza, Antonella Fortunato, Eric Frans, Antonella Frattari, Sebastian Fredes, Tim Frenzel, Roberto Fumagalli, Mariano Andres Furche, Maurizio Fusari, Edward Fysh, Juan Luis Galeas-Lopez, Louis-Marie Galerneau, Analía Garcia, María Fernanda Garcia, Elisabet Garcia, Pablo Garcia Olivares, Jaroslaw Garlicki, Aude Garnero, Eugenio Garofalo, Prabha Gautam, Andrey Gazenkampf, Stéphanie Gelinotte, Domenico Gelormini, Etienne Ghrenassia, Angelo Giacomucci, Robert Giannoni, Andrea Gigante, Nancy Glober, Paolo Gnesin, Yari Gollo, Dina Gomaa, Rosita Gomero Paredes, Rui Gomes, Raúl Alejandro Gomez, Oscar Gomez, Aroa Gomez, Louise Gondim, Manuel Gonzalez, Isabel Gonzalez, Alejandro Gonzalez-Castro, Orlando Gordillo Romero, Federico Gordo, Philippe Gouin, Jerónimo Graf Santos, Rooney Grainne, Matilde Grando, Sanja Granov Grabovica, Salvatore Grasso, Rinaldo Grasso, Lisa Grimmer, Colin Grissom, Qing Gu, Xiang-Dong Guan, Fabio Guarracino, Neus Guasch, Luca Guatteri, Renaud Gueret, Claude Guérin, Emmanuel Guerot, Pierre-Gildas Guitard, Fethi Gül, Ayca Gumus, Mohan Gurjar, Patricia Gutierrez, Abdelhamid Hachimi, Adi Hadzibegovic, Samantha Hagan, Clare Hammel, Joo Han Song, Gabrielle Hanlon, Serge Heines, Johanna Henriksson, Jean-Etienne Herbrecht, Gabriel Omar Heredia Orbegoso, Andrew Hermon, Rosana Hernandez, Carmen Hernandez, Luis Herrera, Manuel Herrera-Gutierrez, Leo Heunks, Juan Hidalgo, Dianne Hill, Dagmar Holmquist, Marcela Homez, Xia Hongtao, Anil Hormis, Daniel Horner, M Carmen Hornos, Meihong Hou, Stacy House, Brahim Housni, Keith Hugill, Sally Humphreys, Louis Humbert, Stephanie Hunter, Lee Hwa Young, Nicolas Iezzi, Santiago Ilutovich, Volkan Inal, Richard Innes, Panagiotis Ioannides, Giorgio Antonio Iotti, Mariachiara Ippolito, Hiromasa Irie, Hiroki Iriyama, Taiga Itagaki, Javier Izura, Santiago Izza, Rakhshanda Jabeen, Hamidreza Jamaati, Sunil Jamadarkhana, Amira Jamoussi, Milosz Jankowski, Luis Alberto Jaramillo, Kyeongman Jeon, Seok Jeong Lee, Deepak Jeswani, Simant Jha, Liangyan Jiang, Chen Jing, Sébastien Jochmans, Bror Anders Johnstad, Lee Jongmin, Aurélie Joret, Detajin Junhasavasdikul, Maria Teresa Jurado, Elisa Kam, Hidenobu Kamohara, Caroline Kane, Iskender Kara, Sait Karakurt, Cherdkiat Karnjanarachata, Jun Kataoka, Shinshu Katayama, Shuchi Kaushik, Nermin Kelebek Girgin, Kathryn Kerr, Ian Kerslake, Prakash Khairnar, Abidi Khalid, Akram Khan, Ashish K Khanna, Reza Khorasanee, Dieneke Kienhorst, Cenk Kirakli, Rihard Knafelj, Mark Kol Kol, Napplika Kongpolprom, Csaba Kopitko, Pervin Korkmaz Ekren, Agnieszka Kubisz-Pudelko, Zoltan Kulcsar, Junji Kumasawa, Akira Kuriyama, Fernanda Kutchak, Eduardo Labarca, Françoise Labat, César Laborda, Manuel Alberto Laca Barrera, Laurie Lagache, Antonio Landaverde Lopez, Michael Lanspa, Valeria Lascari, Matthieu Le Meur, Su Hwan Lee, Young Ju Lee, Jinwoo Lee, Won-Yeon Lee, Jarone Lee, Terje Legernaes, Tamaas Leiner, Virginie Lemiale, Tiago Leonor, Philipp M Lepper, Dahuan Li, Hongbin Li, Oleg Li, Ana Raquel Lima, Dan Lind, Edward Litton, Ning Liu, Ling Liu, Jialin Liu, Jean-François Llitjos, Beatriz Llorente, Rodolfo Lopez, Claudia Elizabeth Lopez, Claudia Lopez Nava, Pablo Lovazzano, Min Lu, Francesca Lucchese, Manuela Lugano, Gustavo Lugo Goytia, Hua Luo, Ceri Lynch, Sebastiano Macheda, Victor Hugo Madrigal Robles, Salvatore Maurizio Maggiore, Mònica Magret Iglesias, Peter Malaga, Harish Mallapura Maheswarappa, Guillermo Malpartida, Andrey Malyarchikov, Helena Mansson, Anaid Manzano, Ismael Marey, Nathalie Marin, Maria Del Carmen Marin, Eliana Markman, Felix Martin, Alex Martin, Cristina Martin Dal Gesso, Felipe Martinez, Conchita Martínez-Fidalgo, Ignacio Martin-Loeches, Arantxa Mas, Sakuraya Masaaki, Emilio Maseda, Eleni Massa, Anna Mattsson, Jessica Maugeri, Victoria McCredie, James McCullough, Shay McGuinness, Andrew McKown, László Medve, Chengqing Mei, Ricard Mellado Artigas, Vitor Mendes, Mohamed Khalaf Ebraheim Mervat, Isabelle Michaux, Michael Mikhaeil, Olga Milagros, Igor Milet, Maria Teresa Millan, Zhang Minwei, Lucia Mirabella, Sanghamitra Mishra, Giovanni Mistraletti, Katsunori Mochizuki, Arif Moghal, Francesco Mojoli, Alexandre Molin, Raquel Montiel, Luca Montini (ORCID:0000-0003-4602-5134), Gianmario Monza, Maria Mora Aznar, Sunthiti Morakul, Maria Morales, Daniel Moreno Torres, Diego Rolando Morocho Tutillo, Catherine Motherway, Doumiri Mouhssine, Eleni Mouloudi, Tapia Muñoz, Carlos Munoz de Cabo, Mohamed Mustafa, Radhakrishnan Muthuchellappan, Muraleekrishnan Muthukrishnan, Stefano Muttini, Isao Nagata, Dick Nahar, Misuzu Nakanishi, Izumi Nakayama, Silvio Antonio Namendys-Silva, Rahul Nanchal, Sivakumar Nandakumar, Alessandra Nasi, Kamal Nasir, Paolo Navalesi, Tayyba Naz Aslam, Thuy Nga Phan, Alistair Nichol, Shuhei Niiyama, Sofia Nikolakopoulou, Elena Nikolic, Kenichi Nitta, Marko Noc, Stephanie Nonas, Saad Nseir, Ayse Nur Soyturk, Yukako Obata, Richard Oeckler, Moe Oguchi, Shinichiro Ohshimo, Marina Oikonomou, Agueda Ojados, Maria Teresa Oliveira, Wilson Oliveira Filho, Carlo Oliveri, Aitor Olmos, Kazuya Omura, Maria Cristina Orlandi, Francesca Orsenigo, Laura Ortiz-Ruiz De Gordoa, Kei Ota, Rainier Ovalle Olmos, Nándo Öveges, Peter Oziemski, Ozlem Ozkan Kuscu, Ezgi Özyilmaz, Fernando Pachas Alvarado, Gonzalo Pagella, Vijayanand Palaniswamy, Eugenio Luis Palazon Sanchez, Salvatore Palmese, Guojun Pan, Wensen Pan, Metaxia Papanikolaou, Theonymfi Papavasilopoulou, Ameet Parekh, Rachael Parke, Francisco J Parrilla, Dácil Parrilla, Taha Pasha, Laura Pasin, Luis Patão, Mayur Patel, Grisma Patel, Basanta Kumar Pati, Jayaprakash Patil, Saroj Pattnaik, Daniel Paul, Maurizio Pavesi, Vanesa Alejandra Pavlotsky, Graciela Paz, Enrique Paz, Elisabetta Pecci, Carlos Pellegrini, Andrea Gabriela Peña Padilla, Gaetano Perchiazzi, Tiago Pereira, Vera Pereira, Manuel Perez, Cesar Perez Calvo, Meisy Perez Cheng, Ronald Perez Maita, Rodrigo Pérez-Araos, Purificación Perez-Teran, David Perez-Torres, Gavin Perkins, Paolo Persona, Tananchai Petnak, Marina Petrova, Tai Pham, François Philippart, Edoardo Picetti, Elisabetta Pierucci, Edoardo Piervincenzi, Riccardo Pinciroli, Maria-Consuelo Pintado, Thomas Piraino, Stephanie Piras, Claudio Piras, Pattarin Pirompanich, Luigi Pisani, Enrique Platas, Gustavo Plotnikow, Willy Porras, Virginia Porta, Mariana Portilla, José Portugal, Pedro Povoa, Gwenael Prat, Romina Pratto, Gabriel Preda, Isidro Prieto, Estefania Prol-Silva, Richard Pugh, Yupeng Qi, Chuanyun Qian, Tiehe Qin, Hongping Qu, Teobaldo Quintana, Rosari Quispe Sierra, Rocio Quispe Soto, Raihan Rabbani, Mohamed Rabee, Ahmed Rabie, Maria Augusta Rahe Pereira, Ashish Rai, Sundar Raj Ashok, Mostafa Rajab, Navin Ramdhani, Elizabeth Ramey, Marco Ranieri, Darshana Rathod, Banambar Ray, Shihan Mahmud Redwanul Huq, Adrian Regli, Rosa Reina, Natalia Resano Sarmiento, Faustine Reynaud, Gemma Rialp, Pilar Ricart, Todd Rice, Angus Richardson, Marcelo Rieder, Martin Rinket, Fernando Rios, Alejandro Risso Vazquez, Ivano Riva, Monaly Rivette, Oriol Roca, Ferran Roche-Campo, Covadonga Rodriguez, Gabriel Rodriguez, Daniel Rodriguez Gonzalez, Xandra Yanina Rodriguez Tucto, Angela Rogers, María Elena Romano, Linda Rørtveit, Alastair Rose, Damien Roux, Anahita Rouze, Paolo Nahuel Rubatto Birri, Wang Ruilan, Aldana Ruiz Robledo, Antonio Luis Ruiz-Aguilar, Tomohito Sadahiro, Ignacio Saez, Judith Sagardia, Rajnish Saha, Rohit Saha, Narongkorn Saiphoklang, Shigeki Saito, Maie Salem, Gabriele Sales, Patricia Salgado, Srinivas Samavedam, Mhamed Sami Mebazaa, Line Samuelsson, Nandyelly San Juan Roman, Patricia Sanchez, Jesus Sanchez-Ballesteros, Yazcitk Sandoval, Emanuele Sani, Martin Santos, Carla Santos, Masamitsu Sanui, Lakshmikanthcharan Saravanabavan, Sema Sari, Agnes Sarkany, Bertrand Sauneuf, Monica Savioli, Hilal Sazak, Riccardo Scano, Francis Schneider, Frédérique Schortgen, Marcus J Schultz, Gabriele Leonie Schwarz, Faruk Seçkin Yücesoy, Andrew Seely, Frederik Seiler, Yasemin Seker Tekdos, Kim Seok Chan, Luca Serano, Wojciech Serednicki, Mariano Setten, Asim Shah, Bhagyesh Shah, You Shang, Pradeep Shanmugasundaram, Konstantin Shapovalov, Eman Shebl, Takuya Shiga, Nobuaki Shime, Phil Shin, Jack Short, Chen Shuhua, Sughrat Siddiqui, Juan Ignacio Silesky Jimenez, Daniel Silva, Betania Silva Sales, Koen Simons, Brit Ågot Sjøbø, David Slessor, Jakub Smiechowicz, Nathan Smischney, Paul Smith, Tim Smith, Mark Smith, Sarah Snape, Lindi Snyman, Filiep Soetens, Kyung Sook Hong, Miguel Ángel Sosa Medellin, Giovanna Soto, Xavier Souloy, Elsa Sousa, Stefania Sovatzis, Didem Sozutek, Savino Spadaro, Marco Spagnoli, Martin Spångfors, Nick Spittle, Mike Spivey, Andrew Stapleton, Branislava Stefanovic, Lorraine Stephenson, Elizabeth Stevenson, Kristian Strand, Maria Teresa Strano, Slavenka Straus, Chenliang Sun, Rongqing Sun, Venkat Sundaram, Tai SunPark, Elisabeth Surlemont, Yuda Sutherasan, Zsuzsanna Szabo, Christopher Tainter, Akihiro Takaba, Mandy Tallott, Tamasato Tamasato, Zhanhong Tang, Viratch Tangsujaritvijit, Leandro Taniguchi, Daisuke Taniguchi, Fabio Tarantino, Krittika Teerapuncharoen, Susana Temprano, Pierpaolo Terragni, Nicolas Terzi, Anand Thakur, Pongdhep Theerawit, Arnaud W Thille, Matt Thomas, Poungrat Thungtitigul, Martial Thyrault, Nejla Tilouch, Karina Timenetsky, Juna Tirapu, Manuel Todeschini, Roser Tomas, Christian Tomaszewski, Tommaso Tonetti, Alexandre Tonnelier, John Trinder, Konlawij Trongtrakul, Jonathon Truwit, Betty Tsuei, Aiman Tulaimat, Sema Turan, Melda Turkoglu, Sanjeev Tyagi, Alejandro Ubeda, Federica Vagginelli, María Florencia Valenti, Imma Vallverdu, Alisha Van Axel, Ingrid van den Hul, Hans van der Hoeven, Nardo Van Der Meer, Marc Vanhoof, Mónica Vargas-Ordoñez, Rosanna Vaschetto, Ettore Vascotto, Maria Vatsik, Ana Vaz, Antonia Vazquez-Sanchez, Sara Ventura, Jan Wytze Vermeijden, Anxela Vidal, Jocyelle Vieira, Bruno Vilela Costa Pinto, Ana Villagra, Cristina Villegas Succar, Ole Georg Vinorum, Giovanni Vitale, Ramesh Vj, Ana Vochin, Guillaume Voiriot, Carlo Alberto Volta, Magnus von Seth, Maazouzi Wajdi, Don Walsh, Shouhong Wang, Gabriel Wardi, Nils Christian Ween-Velken, Bi-Lin Wei, Dolf Weller, Deborah Welsh, Ingeborg Welters, Michael Wert, Simon Whiteley, Elizabeth Wilby, Erin Williams, Karen Williams, Antoinette Wilson, Jadwiga Wojtas, Jin Won Huh, David Wrathall, Christopher Wright, Jian-Feng Wu, Guo Xi, Zheng-Jiang Xing, Hongyang Xu, Kotaro Yamamoto, Jie Yan, Julio Yáñez, Xiaobo Yang, Elliot Yates, Ozlem Yazicioglu Mocin, Zhenglong Ye, Fatma Yildirim, Norifumi Yoshida, Hector Higo Leon Yoshido, Bo Young Lee, Rongguo Yu, Gong Yu, Tao Yu, Boyun Yuan, Nadwipa Yuangtrakul, Tetsuya Yumoto, Xie Yun, Graciela Zakalik, Ahmad Zaki, Begoña Zalba-Etayo, Massimo Zambon, Bin Zang, Gianluca Zani, Jonathan Zarka, Simone Maria Zerbi, Avsar Zerman, Harald Zetterquist, Jiuzhi Zhang, Hongwen Zhang, Wei Zhang, Guoxiu Zhang, Weixin Zhang, Hongsheng Zhao, Jia Zheng, Bin Zhu, and Ronald Zumaran
Abstract: Background: Current management practices and outcomes in weaning from invasive mechanical ventilation are poorly understood. We aimed to describe the epidemiology, management, timings, risk for failure, and outcomes of weaning in patients requiring at least 2 days of invasive mechanical ventilation. Methods: WEAN SAFE was an international, multicentre, prospective, observational cohort study done in 481 intensive care units in 50 countries. Eligible participants were older than 16 years, admitted to a participating intensive care unit, and receiving mechanical ventilation for 2 calendar days or longer. We defined weaning initiation as the first attempt to separate a patient from the ventilator, successful weaning as no reintubation or death within 7 days of extubation, and weaning eligibility criteria based on positive end-expiratory pressure, fractional concentration of oxygen in inspired air, and vasopressors. The primary outcome was the proportion of patients successfully weaned at 90 days. Key secondary outcomes included weaning duration, timing of weaning events, factors associated with weaning delay and weaning failure, and hospital outcomes. This study is registered with ClinicalTrials.gov, NCT03255109. Findings: Between Oct 4, 2017, and June 25, 2018, 10 232 patients were screened for eligibility, of whom 5869 were enrolled. 4523 (77·1%) patients underwent at least one separation attempt and 3817 (65·0%) patients were successfully weaned from ventilation at day 90. 237 (4·0%) patients were transferred before any separation attempt, 153 (2·6%) were transferred after at least one separation attempt and not successfully weaned, and 1662 (28·3%) died while invasively ventilated. The median time from fulfilling weaning eligibility criteria to first separation attempt was 1 day (IQR 0-4), and 1013 (22·4%) patients had a delay in initiating first separation of 5 or more days. Of the 4523 (77·1%) patients with separation attempts, 2927 (64·7%) had a short wean (≤1 d
Published: 2023

10. Acquired laryngomalacia as a cause of post-extubation respiratory failure in patient with postoperative seizure and central pontine myelinolysis after craniotomy

Author: Yusuke Akimoto, Natsuki Bando, Hiroki Sato, Koji Sato, Kazuki Momota, Toshiyuki Nunomura, Yoshitoyo Ueno, Manabu Ishihara, Natsuki Tane, Taiga Itagaki, and Jun Oto
Subjects: Male, Laryngoscopy, General Medicine, Laryngomalacia, General Biochemistry, Genetics and Molecular Biology, Seizures, postoperative seizure, Myelinolysis, Central Pontine, Airway Extubation, acquired laryngomalacia, Humans, extubation failure, Child, Respiratory Insufficiency, central pontine myelinolysis, Craniotomy, Aged, Respiratory Sounds
Abstract: Background : Laryngomalacia is a congenital abnormality of the larynx that commonly occurs in children and rarely in adults. We report the first case of acquired laryngomalacia mainly due to postoperative seizure and central pontine myelinolysis after scheduled craniotomy. Case presentation : A 69-year-old man was admitted to the hospital for elective craniotomy for craniopharyngioma. After the surgery, he developed refractory seizure and required intubation and mechanical ventilation in the intensive-care unit (ICU). After treatment for the seizure, he was extubated. However, immediately after extubation, he developed stridor and respiratory retraction. We performed fiberoptic laryngoscopy and confirmed that the epiglottis had collapsed into the posterior wall of the pharynx during inspiration, which was suspected to be laryngomalacia. He received invasive mechanical ventilation for two days following re-extubation. After the second extubation, he developed stridor again due to acquired laryngomalacia. Six days later, his respiratory condition had worsened, and he received re-intubation and tracheostomy. After ICU discharge, central pontine myelinolysis was diagnosed by magnetic resonance imaging. Conclusions : Adult-onset laryngomalacia is a rare cause of upper airway obstruction but should be considered as a cause of postoperative extubation failure. We should not delay performing fiberoptic laryngoscopy to evaluate this pathology and provide optimal treatment. J. Med. Invest. 69 : 316-319, August, 2022.
Published: 2022

11. The quality and quantity of sleep on dexmedetomidine during high-flow nasal cannula oxygen therapy in critically ill patients

Author: Yoshitoyo Ueno, Koji Sato, Kazuki Momota, Hiroki Sato, Yuki Nakano, Yusuke Akimoto, Toshiyuki Nunomura, Natsuki Tane, Taiga Itagaki, and Jun Oto
Subjects: Oxygen, Critical Illness, Cannula, Humans, General Medicine, sleep disturbance, high-flow nasal cannula oxygen therapy (HFNC), Sleep, General Biochemistry, Genetics and Molecular Biology, Dexmedetomidine
Abstract: Purpose : High-flow nasal cannula oxygen therapy (HFNC) is a new type of non-invasive respiratory support for acute respiratory failure patients. However, patients receiving HFNC often develop sleep disturbances. We therefore examined whether dexmedetomidine could preserve the sleep characteristics in patients who underwent HFNC. Patients and Methods : This was a pilot, randomized controlled study. We assigned critically ill patients treated with HFNC to receive dexmedetomidine (0.2 to 0.7 µg / kg / h, DEX group) or not (non-DEX group) at night (9:00 p.m. to 6:00 a.m.). Polysomnograms were monitored during the study period. The primary outcomes were total sleep time (TST), sleep efficiency and duration of stage 2 non-rapid eye movement (stage N2) sleep. Results : Of the 28 patients who underwent randomization, 24 were included in the final analysis (12 patients per group). Dexmedetomidine increased the TST (369 min vs. 119 min, p = 0.024) and sleep efficiency (68% vs. 22%, P = 0.024). The duration of stage N2 was increased in the DEX group compared with the non-DEX group, but this finding did not reach statistical significance. The incidences of respiratory depression and hemodynamic instability were similar between the two groups. Conclusions : In critically ill patients who underwent HFNC, dexmedetomidine may optimize the sleep quantity without any adverse events. J. Med. Invest. 69 : 266-272, August, 2022.
Published: 2022

12. Independent ventilation of graft rejection

Author: Yoshitoyo Ueno, Saki Harada, Koji Sato, Kazuki Momota, Hiroki Sato, Yusuke Akimoto, Yuta Arai, Toshiyuki Nunomura, Manabu Ishihara, Natsuki Tane, Taiga Itagaki, Yasuhiko Nishioka, and Jun Oto
Subjects: single-lung transplantation, Emphysema, acute allograft rejection, General Medicine, Middle Aged, Allografts, Respiration, Artificial, General Biochemistry, Genetics and Molecular Biology, Pulmonary Emphysema, Humans, Female, independent lung ventilation, Lung, Lung Transplantation
Abstract: Background : We herein report the use of independent lung ventilation (ILV) for managing acute allograft rejection after single-lung transplantation (SLT) for end-stage emphysema. Case presentation : A 54-year-old woman was transferred to our hospital with severe hypoxemia and respiratory distress due to unilateral lung disease with diffuse alveolar damage in the right donor lung associated with acute allograft rejection and with hyperinflation of the left native lung due to emphysema. She was unresponsive to immunosuppressive medications and conventional ventilation strategies, so different ventilator settings for each lung were required. A double-lumen endotracheal tube (DLT) was inserted, and ILV was initiated. The right lung was ventilated with high positive end-expiratory pressure (PEEP), intended for lung recruitment, and the left lung was ventilated with lung protective strategies using a low tidal volume and low levels of PEEP to avoid hyperinflation. Two days later, her lung function was dramatically improved, and the DLT was replaced with a single-lumen endotracheal tube. Gas exchange was maintained, and she was successfully weaned from mechanical ventilation on intensive-care unit day 15. Conclusions : ILV appears to be effective and safe for managing acute allograft rejection after SLT for emphysema. J. Med. Invest. 69 : 323-327, August, 2022.
Published: 2022

13. Effect of Electrical Muscle Stimulation on Upper and Lower Limb Muscles in Critically Ill Patients : A Two-Center Randomized Controlled Trial

Author: Hiroshi Sakaue, Rie Tsutsumi, Tomoko Yamamoto, Emiko Nakataki, Taiga Itagaki, Nobuto Nakanishi, Jun Oto, Masaji Nishimura, and Yoshitoyo Ueno
Subjects: Male, Weakness, Critical Illness, Electrical muscle stimulation, medicine.medical_treatment, Electric Stimulation Therapy, Rectus femoris muscle, Critical Care and Intensive Care Medicine, Biceps, Quadriceps Muscle, law.invention, 03 medical and health sciences, 0302 clinical medicine, Atrophy, Randomized controlled trial, Critically ill patients, law, medicine, Humans, Single-Blind Method, Amino Acids, Muscle, Skeletal, Aged, Intensive care unit-acquired weakness, business.industry, Incidence (epidemiology), Extremities, 030208 emergency & critical care medicine, medicine.disease, Muscle atrophy, Muscular Atrophy, 030228 respiratory system, Anesthesia, Proteolysis, Female, medicine.symptom, business
Abstract: Electrical muscle stimulation is widely used to enhance lower limb mobilization. Although upper limb muscle atrophy is common in critically ill patients, electrical muscle stimulation application for the upper limbs has been rarely reported. The purpose of this study was to investigate whether electrical muscle stimulation prevents upper and lower limb muscle atrophy and improves physical function.Randomized controlled trial.Two-center, mixed medical/surgical ICU.Adult patients who were expected to be mechanically ventilated for greater than 48 hours and stay in the ICU for greater than 5 days.Forty-two patients were randomly assigned to the electrical muscle stimulation (n = 17) or control group (n = 19).Primary outcomes were change in muscle thickness and cross-sectional area of the biceps brachii and rectus femoris from day 1 to 5. Secondary outcomes included occurrence of ICU-acquired weakness, ICU mobility scale, length of hospitalization, and amino acid levels. The change in biceps brachii muscle thickness was -1.9% versus -11.2% in the electrical muscle stimulation and control (p = 0.007) groups, and the change in cross-sectional area was -2.7% versus -10.0% (p = 0.03). The change in rectus femoris muscle thickness was -0.9% versus -14.7% (p = 0.003) and cross-sectional area was -1.7% versus -10.4% (p = 0.04). No significant difference was found in ICU-acquired weakness (13% vs 40%; p = 0.20) and ICU mobility scale (3 vs 2; p = 0.42) between the groups. The length of hospitalization was shorter in the electrical muscle stimulation group (23 d [19-34 d] vs 40 d [26-64 d]) (p = 0.04). On day 3, the change in the branched-chain amino acid level was lower in the electrical muscle stimulation group (40.5% vs 71.5%; p = 0.04).In critically ill patients, electrical muscle stimulation prevented upper and lower limb muscle atrophy and attenuated proteolysis and decreased the length of hospitalization.
Published: 2020

14. Effect of controlled ventilation during assist-control ventilation on diaphragm thickness : a post hoc analysis of an observational study

Author: Yoshitoyo Ueno, Taiga Itagaki, Jun Oto, Nobuto Nakanishi, Takuya Takashima, Toshiyuki Nunomura, Yumiko Tsunano, and Natsuki Tane
Subjects: Adult, Adolescent, Mechanical Ventilation, medicine.medical_treatment, General Biochemistry, Genetics and Molecular Biology, Positive-Pressure Respiration, Young Adult, 03 medical and health sciences, 0302 clinical medicine, atrophy, Interquartile range, Post-hoc analysis, medicine, Humans, Child, Aged, Retrospective Studies, Aged, 80 and over, Mechanical ventilation, business.industry, General Medicine, Middle Aged, Controlled ventilation, Respiration, Artificial, Confidence interval, Diaphragm (structural system), 030228 respiratory system, diaphragm, Child, Preschool, 030220 oncology & carcinogenesis, Anesthesia, Breathing, ventilator-induced diaphragm disfunction, Observational study, assist-controlled ventilation, business
Abstract: Background : Since diaphragm passivity induces oxidative stress that leads to rapid atrophy of diaphragm, we investigated the effect of controlled ventilation on diaphragm thickness during assist-control ventilation (ACV). Methods : Previously, we measured end-expiratory diaphragm thickness (Tdiee) of patients mechanically ventilated for more than 48 hours on days 1, 3, 5 and 7 after the start of ventilation. We retrospectively investigated the proportion of controlled ventilation during the initial 48-hour ACV (CV48%). Patients were classified according to CV48% : Low group, less than 25% ; High group, higher than 25%. Results : Of 56 patients under pressure-control ACV, Tdiee increased more than 10% in 6 patients (11%), unchanged in 8 patients (14%) and decreased more than 10% in 42 patients (75%). During the first week of ventilation, Tdiee decreased in both groups : Low (difference, -7.4% ; 95% confidence interval [CI], -10.1% to -4.6% ; p < 0.001) and High group (difference, -5.2% ; 95% CI, -8.5% to -2.0% ; p = 0.049). Maximum Tdiee variation from baseline did not differ between Low (-15.8% ; interquartile range [IQR], -22.3 to -1.5) and High group (-16.7% ; IQR, -22.6 to -11.1, p = 0.676). Conclusions : During ACV, maximum variation in Tdiee was not associated with proportion of controlled ventilation higher than 25%. J. Med. Invest. 67 : 332-337, August, 2020.
Published: 2020

15. Change in diaphragm and intercostal muscle thickness in mechanically ventilated patients: a prospective observational ultrasonography study

Author: Masaji Nishimura, Taiga Itagaki, Nobuto Nakanishi, Yoshitoyo Ueno, Jun Oto, and Emiko Nakataki
Subjects: medicine.medical_treatment, Diaphragm, Critical Care and Intensive Care Medicine, 03 medical and health sciences, 0302 clinical medicine, Atrophy, Medicine, Respiratory system, Ultrasonography, Mechanical ventilation, business.industry, Research, Hazard ratio, lcsh:Medical emergencies. Critical care. Intensive care. First aid, 030208 emergency & critical care medicine, Intercostal muscle, lcsh:RC86-88.9, medicine.disease, Confidence interval, Diaphragm (structural system), medicine.anatomical_structure, 030228 respiratory system, Anesthesia, business
Abstract: Background Diaphragm atrophy is observed in mechanically ventilated patients. However, the atrophy is not investigated in other respiratory muscles. Therefore, we conducted a two-center prospective observational study to evaluate changes in diaphragm and intercostal muscle thickness in mechanically ventilated patients. Methods Consecutive adult patients who were expected to be mechanically ventilated longer than 48 h in the ICU were enrolled. Diaphragm and intercostal muscle thickness were measured on days 1, 3, 5, and 7 with ultrasonography. The primary outcome was the direction of change in muscle thickness, and the secondary outcomes were the relationship of changes in muscle thickness with patient characteristics. Results Eighty patients (54 males and 26 females; mean age, 68 ± 14 years) were enrolled. Diaphragm muscle thickness decreased, increased, and remained unchanged in 50 (63%), 15 (19%), and 15 (19%) patients, respectively. Intercostal muscle thickness decreased, increased, and remained unchanged in 48 (60%), 15 (19%), and 17 (21%) patients, respectively. Decreased diaphragm or intercostal muscle thickness was associated with prolonged mechanical ventilation (median difference (MD), 3 days; 95% CI (confidence interval), 1–7 and MD, 3 days; 95% CI, 1–7, respectively) and length of ICU stay (MD, 3 days; 95% CI, 1–7 and MD, 3 days; 95% CI, 1–7, respectively) compared with the unchanged group. After adjusting for sex, age, and APACHE II score, they were still associated with prolonged mechanical ventilation (hazard ratio (HR), 4.19; 95% CI, 2.14–7.93 and HR, 2.87; 95% CI, 1.53–5.21, respectively) and length of ICU stay (HR, 3.44; 95% CI, 1.77–6.45 and HR, 2.58; 95% CI, 1.39–4.63, respectively) compared with the unchanged group. Conclusions Decreased diaphragm and intercostal muscle thickness were frequently seen in patients under mechanical ventilation. They were associated with prolonged mechanical ventilation and length of ICU stay. Trial registration UMIN000031316. Registered on 15 February 2018
Published: 2019

16. Relationships between double cycling and inspiratory effort with diaphragm thickness during the early phase of mechanical ventilation: A prospective observational study

Author: Taiga Itagaki, Yusuke Akimoto, Yuki Nakano, Yoshitoyo Ueno, Manabu Ishihara, Natsuki Tane, Yumiko Tsunano, and Jun Oto
Subjects: Adult, Positive-Pressure Respiration, Multidisciplinary, Ventilators, Mechanical, Diaphragm, Humans, Respiration, Artificial, Aged, Retrospective Studies
Abstract: Background Increased and decreased diaphragm thickness during mechanical ventilation is associated with poor outcomes. Some types of patient-ventilator asynchrony theoretically cause myotrauma of the diaphragm. However, the effects of double cycling on structural changes in the diaphragm have not been previously evaluated. Hence, this study aimed to investigate the relationship between double cycling during the early phase of mechanical ventilation and changes in diaphragm thickness, and the involvement of inspiratory effort in the occurrence of double cycling. Methods We evaluated adult patients receiving invasive mechanical ventilation for more than 48 h. The end-expiratory diaphragm thickness (Tdiee) was assessed via ultrasonography on days 1, 2, 3, 5 and 7 after the initiation of mechanical ventilation. Then, the maximum rate of change from day 1 (ΔTdiee%) was evaluated. Concurrently, we recorded esophageal pressure and airway pressure on days 1, 2 and 3 for 1 h during spontaneous breathing. Then, the waveforms were retrospectively analyzed to calculate the incidence of double cycling (double cycling index) and inspiratory esophageal pressure swing (ΔPes). Finally, the correlation between double cycling index as well as ΔPes and ΔTdiee% was investigated using linear regression models. Results In total, 19 patients with a median age of 69 (interquartile range: 65–78) years were enrolled in this study, and all received pressure assist-control ventilation. The Tdiee increased by more than 10% from baseline in nine patients, decreased by more than 10% in nine and remained unchanged in one. The double cycling indexes on days 1, 2 and 3 were 2.2%, 1.3% and 4.5%, respectively. There was a linear correlation between the double cycling index on day 3 and ΔTdiee% (R2 = 0.446, p = 0.002). The double cycling index was correlated with the ΔPes on days 2 (R2 = 0.319, p = 0.004) and 3 (R2 = 0.635, p < 0.001). Conclusions Double cycling on the third day of mechanical ventilation was associated with strong inspiratory efforts and, possibly, changes in diaphragm thickness.
Published: 2021

17. Bacterial Contamination of Circuit Inner Surfaces After High-Flow Oxygen Therapy

Author: Mutsuo Onodera, Emiko Nakataki, Masami Sato, Masaji Nishimura, Jun Oto, Taiga Itagaki, and Nobuto Nakanishi
Subjects: Adult, Male, Pulmonary and Respiratory Medicine, Adolescent, medicine.medical_treatment, Bacterial growth, Critical Care and Intensive Care Medicine, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Oxygen therapy, medicine, Humans, Prospective Studies, Child, Aged, Aged, 80 and over, Bacteria, business.industry, Infant, Newborn, Oxygen Inhalation Therapy, Temperature, Infant, Humidity, High flow oxygen, General Medicine, Middle Aged, Contamination, University hospital, 030228 respiratory system, Child, Preschool, Anesthesia, Equipment Contamination, Female, High flow, business
Abstract: BACKGROUND: During high-flow oxygen therapy, heated humidified gas is delivered at high flow. Although the warmth and humidity of this gas facilitates mucociliary function in the lower airway, warm and humid conditions also promote bacterial growth. Bacterial contamination of high-flow oxygen therapy circuits has not been well investigated. We examined the incidence of bacterial contamination in high-flow oxygen therapy circuits. METHODS: This was a prospective observational study in a university hospital 10-bed general ICU. After final high-flow oxygen therapy discontinuation, samples were obtained from the interface and the chamber ends of the circuit. Initially, a half circumference of each inner surface was swabbed, after which the whole circuit was left in the ICU at room temperature for 6 h. The samples were then, in the same way, taken from the previously unswabbed arcs of the end inner surfaces. All the samples were sent to a biology laboratory and cultured. RESULTS: In all, 118 samples were collected from 31 circuits. The median duration of high-flow oxygen therapy was 48 h (interquartile range, 26–96 h). Of 31 circuits, contamination occurred in 5 circuits (16.1% [95% CI 5.5–33.7%]). CONCLUSIONS: Bacterial contamination of inner surfaces of the circuit after high-flow oxygen therapy was relatively high.
Published: 2019

18. Independent lung ventilation for the management of acute allograft rejection after single-lung transplantation for end-stage emphysema.

Author: Yoshitoyo Ueno, Saki Harada, Koji Sato, Kazuki Momota, Hiroki Sato, Yusuke Akimoto, Yuta Arai, Toshiyuki Nunomura, Manabu Ishihara, Natsuki Tane, Taiga Itagaki, Yasuhiko Nishioka, and Jun Oto
Subjects: PULMONARY ventilation-perfusion scans, HOMOGRAFTS, LUNG transplantation, RESPIRATORY distress syndrome, IMMUNOSUPPRESSIVE agents
Abstract: Background: We herein report the use of independent lung ventilation (ILV) for managing acute allograft rejection after single-lung transplantation (SLT) for end-stage emphysema. Case presentation: A 54-year-old woman was transferred to our hospital with severe hypoxemia and respiratory distress due to unilateral lung disease with diffuse alveolar damage in the right donor lung associated with acute allograft rejection and with hyperinflation of the left native lung due to emphysema. She was unresponsive to immunosuppressive medications and conventional ventilation strategies, so different ventilator settings for each lung were required. A double-lumen endotracheal tube (DLT) was inserted, and ILV was initiated. The right lung was ventilated with high positive end-expiratory pressure (PEEP), intended for lung recruitment, and the left lung was ventilated with lung protective strategies using a low tidal volume and low levels of PEEP to avoid hyperinflation. Two days later, her lung function was dramatically improved, and the DLT was replaced with a single-lumen endotracheal tube. Gas exchange was maintained, and she was successfully weaned from mechanical ventilation on intensive-care unit day 15. Conclusions: ILV appears to be effective and safe for managing acute allograft rejection after SLT for emphysema. J. Med. Invest. 69: 323-327, August, 2022. [ABSTRACT FROM AUTHOR]
Published: 2022
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19. Urinary Titin Is a Novel Biomarker for Muscle Atrophy in Nonsurgical Critically Ill Patients: A Two-Center, Prospective Observational Study

Author: Jun Oto, Rie Tsutsumi, Takuya Takashima, Taiga Itagaki, Emiko Nakataki, Nobuto Nakanishi, Kanako Hara, Hiroshi Sakaue, and Masafumi Matsuo
Subjects: muscle atrophy, Male, Weakness, medicine.medical_specialty, Urinary system, Critical Illness, Diaphragm, Urology, intensive care unit-acquired weakness, Urine, Rectus femoris muscle, Critical Care and Intensive Care Medicine, Quadriceps Muscle, 03 medical and health sciences, 0302 clinical medicine, Japan, Medicine, Humans, Connectin, Hospital Mortality, Prospective Studies, Aged, Ultrasonography, Aged, 80 and over, rectus femoris muscle, Muscle Weakness, biology, ultrasound, business.industry, 030208 emergency & critical care medicine, Length of Stay, Middle Aged, Physical Functional Performance, urinary titin, Muscle atrophy, Diaphragm (structural system), Intensive Care Units, Muscular Atrophy, 030228 respiratory system, Creatinine, biology.protein, Biomarker (medicine), Titin, Female, medicine.symptom, business, Biomarkers
Abstract: Objective: Although skeletal muscle atrophy is common in critically ill patients, biomarkers associated with muscle atrophy have not been identified reliably. Titin is a spring-like protein found in muscles and has become a measurable biomarker for muscle breakdown. We hypothesized that urinary titin is useful for monitoring muscle atrophy in critically ill patients. Therefore, we investigated urinary titin level and its association with muscle atrophy in critically ill patients. Design: Two-center, prospective observational study Setting: Mixed medical/surgical intensive care unit (ICU) in Japan Patients: Nonsurgical adult patients who were expected to remain in ICU for >5 days Interventions: None Methods: Urine samples were collected on days 1, 2, 3, 5, and 7 of ICU admission. To assess muscle atrophy, rectus femoris cross-sectional area and diaphragm thickness were measured with ultrasound on days 1, 3, 5, and 7. Secondary outcomes included its relationship with ICU-acquired weakness (ICU-AW), ICU Mobility Scale (IMS), and ICU mortality. Measurements and Main Results: Fifty-six patients and 232 urinary titin measurements were included. Urinary titin (normal range: 1–3 pmol/mg Cr) was 27.9 (16.8–59.6), 47.6 (23.5–82.4), 46.6 (24.4–97.6), 38.4 (23.6–83.0), and 49.3 (27.4–92.6) pmol/mg Cr on days 1, 2, 3, 5, and 7, respectively. Cumulative urinary titin level was significantly associated with rectus femoris muscle atrophy on days 3–7 (p < 0.03), although urinary titin level was not associated with change in diaphragm thickness (p = 0.31–0.45). Furthermore, cumulative urinary titin level was associated with incidence of ICU-AW (p = 0.01) and ICU mortality (p = 0.02) but not with IMS (p = 0.18). Conclusions: In nonsurgical critically ill patients, urinary titin level increased 10–30 times compared with the normal level. The increased urinary titin level was associated with lower limb muscle atrophy, incidence of ICU-AW, and ICU mortality.
Published: 2020

20. Effect of High-Flow Nasal Cannula on Sleep-disordered Breathing and Sleep Quality in Patients With Acute Stroke

Author: Natsuki Tane, Manabu Ishihara, Yasuhiro Suzuki, Taiga Itagaki, Jun Oto, Nobuto Nakanishi, Yumiko Tsunano, and Yoshitoyo Ueno
Subjects: Pulmonology, high-flow nasal cannula, medicine.medical_treatment, Rapid eye movement sleep, Positive pressure, rapid eye movement sleep, 030204 cardiovascular system & hematology, medicine.disease_cause, 03 medical and health sciences, 0302 clinical medicine, Internal Medicine, medicine, adherence, Continuous positive airway pressure, Stroke, sleep efficiency, business.industry, Standard treatment, sleep-disordered breathing, General Engineering, medicine.disease, stroke, nervous system diseases, respiratory tract diseases, apnea-hypoxia index, Neurology, Tolerability, Anesthesia, oxygen desaturation index, Breathing, business, Nasal cannula, 030217 neurology & neurosurgery
Abstract: Introduction Sleep-disordered breathing (SDB) is common after stroke. Although the standard treatment of SDB is continuous positive airway pressure (CPAP) ventilation, the patient’s intolerance and discomfort result in low adherence rates. Alternatively, high-flow nasal cannula (HFNC) may be useful as it reduces upper airway collapse with low level of positive pressure and well tolerability. The aim of this study was to investigate whether HFNC therapy reduces SDB and improves sleep quality with higher compliance rate. Methods We included acute stroke patients with SDB for the assessment of apnea-hypopnea index (AHI) >5/h using WatchPAT 200 (Itamar Medical Ltd, Caesarea, Israel). Patients who met inclusion criteria received HFNC therapy (40 L/min) with monitoring by WatchPAT. AHI, oxygen desaturation index (ODI), sleep efficiency, and rapid eye movement (REM) sleep were compared in patients with and without HFNC therapy. We also evaluated the patient’s comfort of HFNC therapy (discomfort or not). Results Among 17 patients assessed for AHI, 12 received HFNC therapy. HFNC therapy was not adhered in two patients due to intolerance. Eight patients remained for final analysis. There were no differences in SDB and sleep quality with and without HFNC therapy as follows: HFNC therapy vs control; AHI 24.9 ± 20.1 vs 21.3 ± 15.0/h (p = 0.63), ODI 16.2 ± 16.5 vs 12.9 ± 12.3/h (p = 0.54), sleep efficiency 80.4 ± 12.9 vs 87.1 ± 6.2 (p = 0.28), percentage of REM sleep 19.4% ± 9.6% vs 27.6% ± 8.9% (p = 0.07). Two patients (17%) complained of discomfort among eight patients. Conclusion HFNC therapy did not improve SDB and sleep quality. Nonadherence and discomfort were observed in HFNC therapy. We need a large trial to confirm this result.
Published: 2020

21. Monitoring of muscle mass in critically ill patients: comparison of ultrasound and two bioelectrical impedance analysis devices

Author: Yoshitoyo Ueno, Yasuo M. Tsutsumi, Hiroshi Sakaue, Rie Tsutsumi, Takuya Takashima, Jun Oto, Yoshihiro Okayama, Taiga Itagaki, and Nobuto Nakanishi
Subjects: Bioelectrical impedance analysis, medicine.medical_specialty, medicine.medical_treatment, Critical Care and Intensive Care Medicine, Muscle mass, law.invention, 03 medical and health sciences, 0302 clinical medicine, Critically ill patients, 030202 anesthesiology, Interquartile range, law, Internal medicine, Ultrasound, Medicine, Mechanical ventilation, business.industry, Research, lcsh:Medical emergencies. Critical care. Intensive care. First aid, lcsh:RC86-88.9, Intensive care unit, Confidence interval, Muscle atrophy, Fluid balance, Cardiology, medicine.symptom, business, 030217 neurology & neurosurgery
Abstract: Background Skeletal muscle atrophy commonly occurs in critically ill patients, and decreased muscle mass is associated with worse clinical outcomes. Muscle mass can be assessed using various tools, including ultrasound and bioelectrical impedance analysis (BIA). However, the effectiveness of muscle mass monitoring is unclear in critically ill patients. This study was conducted to compare ultrasound and BIA for the monitoring of muscle mass in critically ill patients. Methods We recruited adult patients who were expected to undergo mechanical ventilation for > 48 h and to remain in the intensive care unit (ICU) for > 5 days. On days 1, 3, 5, 7, and 10, muscle mass was evaluated using an ultrasound and two BIA devices (Bioscan: Malton International, England; Physion: Nippon Shooter, Japan). The influence of fluid balance was also evaluated between each measurement day. Results We analyzed 93 images in 21 patients. The age of the patients was 69 (interquartile range, IQR, 59–74) years, with 16 men and 5 women. The length of ICU stay was 11 days (IQR, 9–25 days). The muscle mass, monitored by ultrasound, decreased progressively by 9.2% (95% confidence interval (CI), 5.9–12.5%), 12.7% (95% CI, 9.3–16.1%), 18.2% (95% CI, 14.7–21.6%), and 21.8% (95% CI, 17.9–25.7%) on days 3, 5, 7, and 10 (p r = 0.04, p = 0.74). The muscle mass did not decrease significantly in both the BIA devices (Bioscan, p = 0.14; Physion, p = 0.60), and an influence of fluid balance was observed (Bioscan, r = 0.37, p r = 0.51, p r = 0.51, p r = 0.37, p r = − 0.05, p = 0.69; Physion, r = 0.23, p = 0.07). Conclusions Ultrasound is suitable for sequential monitoring of muscle atrophy in critically ill patients. Monitoring by BIA should be carefully interpreted owing to the influence of fluid change. Trial registration UMIN000031316. Retrospectively registered on 15 February 2018.
Published: 2019

22. The effect of head rotation on efficiency of face mask ventilation in anaesthetised apnoeic adults

Author: Robert M. Kacmarek, Yandong Jiang, Jun Oto, Sara M. Burns, Jeremi R. Mountjoy, and Taiga Itagaki
Subjects: Adult, Male, Adolescent, Rotation, Apnea, Peak inspiratory pressure, Anesthesia, General, Laryngeal Masks, Patient Positioning, Young Adult, 03 medical and health sciences, 0302 clinical medicine, 030202 anesthesiology, Humans, Medicine, Plethysmograph, General anaesthesia, Elective surgery, Aged, Cross-Over Studies, business.industry, Middle Aged, Airway obstruction, medicine.disease, Crossover study, Confidence interval, Treatment Outcome, Anesthesiology and Pain Medicine, 030228 respiratory system, Elective Surgical Procedures, Anesthesia, Female, business, Head
Abstract: Background Upper airway obstruction occurs commonly after induction of general anaesthesia. It is the major cause of difficult mask ventilation. Objectives The aim of this study was to determine whether head rotation improves the efficiency of mask ventilation of anaesthetised apnoeic adults. Design A randomised, crossover study. Setting Single university teaching hospital. Patients Forty patients, aged 18 to 75 years with a BMI 18.5 to 35.0 kg m requiring general anaesthesia for elective surgery were recruited and randomised into two groups. Interventions Once apnoeic after induction of general anaesthesia, face mask ventilation began with pressure controlled ventilation, at a peak inspiratory pressure of 15 cmH2O. Each patient was ventilated for three 1-min intervals with the head position alternated every minute: group A, mask ventilation was performed with a neutral head position for 1 min, followed by an axial head position rotated 45° to the right for 1 min and then returned to the neutral position for another 1 min. In group B, the sequence of head positioning was rotated → neutral → rotated. Main outcome measures Expiratory tidal volume, measured with a respiratory inductive plethysmograph. Results Two patients were excluded due to protocol violation; thus, data from 38 patients were analysed. The mean expiratory tidal volume was significantly higher in the rotated head position than in the neutral position (612.6 vs. 544.0 ml: difference [95% confidence interval], 68.6 [46.8 to 90.4] ml, P Conclusion Head rotation of 45° in anaesthetised apnoeic adults significantly increases the efficiency of mask ventilation compared with the neutral head position. Head rotation is an effective alternative to improve mask ventilation if airway obstruction is encountered. Trial registration ClinicalTrials.gov identifier: NCT02755077.
Published: 2017

23. Performance of the PneuX System: A Bench Study Comparison With 4 Other Endotracheal Tube Cuffs

Author: Taiga Itagaki, Daniel F Fisher, Robert M. Kacmarek, Christopher T Chenelle, and Lorenzo Berra
Subjects: Models, Anatomic, Pulmonary and Respiratory Medicine, Leak, medicine.medical_specialty, medicine.medical_treatment, Polyurethanes, Tracheal wall, Critical Care and Intensive Care Medicine, System a, Positive-Pressure Respiration, 03 medical and health sciences, 0302 clinical medicine, Lubrication, Intubation, Intratracheal, Pressure, medicine, Humans, Intubation, Polyvinyl Chloride, Endotracheal tube, Mechanical ventilation, business.industry, Respiratory Aspiration, 030208 emergency & critical care medicine, Equipment Design, General Medicine, Intracuff pressure, respiratory system, Surgery, Trachea, 030228 respiratory system, Anesthesia, Cuff, Equipment Failure, business
Abstract: BACKGROUND: Cuff design affects microaspiration, a risk factor for pneumonia. We questioned whether the PneuX low-volume fold-free cuff design would prevent cuff leakage and maintain the same tracheal wall pressure as high-volume, low-pressure (HVLP) cuffs. METHODS: We evaluated 4 HVLP-cuffed endotracheal tubes (ETTs), Hi-Lo (polyvinyl chloride [PVC]), Microcuff (polyurethane [PU]), SealGuard (PU + tapered), and TaperGuard (PVC + tapered), and the PneuX with its dedicated tracheal seal monitor. In Part 1, we determined tracheal wall pressure using each cuff9s capacity to support water columns across recommended intracuff pressures. In Part 2, we evaluated the tracheal seal monitor function at recommended settings. In Part 3, we compared leakage volumes of all ETTs during 30 min of simulated mechanical ventilation or during 8 h if no leak occurred. Parts 1 and 3 were performed with/without lubrication and PEEP. RESULTS: In Part 1, PneuX cuffs exerted an average tracheal wall pressure of 27.4 ± 2.4 cm H2O at the recommended intracuff pressure of approximately 80 cm H2O. Tracheal wall pressure did not differ among HVLP cuffs (19.6 ± 1.4 to 29.5 ± 1.4 cm H2O). In Part 2, preinflation intracuff pressure affected the time to obtain tracheal seal monitor pressure attainment (P CONCLUSIONS: The PneuX cuff generally exerted acceptable tracheal wall pressure, but the tracheal wall pressure monitor allowed pressures exceeding 30 cm H2O in some trials and was the only ETT to prevent leak in all tests. For HVLP cuffs, leak was reduced by PU and PEEP and eliminated by lubrication.
Published: 2016

24. Effects of Leak Compensation on Patient-Ventilator Synchrony During Premature/Neonatal Invasive and Noninvasive Ventilation: A Lung Model Study

Author: Desmond J Bennett, Robert M. Kacmarek, Daniel F Fisher, Taiga Itagaki, and Christopher T Chenelle
Subjects: Pulmonary and Respiratory Medicine, Leak, Critical Care, Critical Care and Intensive Care Medicine, medicine.disease_cause, Models, Biological, Continuous mandatory ventilation, law.invention, 03 medical and health sciences, 0302 clinical medicine, law, medicine, Humans, Computer Simulation, 030212 general & internal medicine, Lung, Noninvasive Ventilation, Ventilators, Mechanical, business.industry, Pressure control, Infant, Newborn, Equipment Design, General Medicine, Respiration, Artificial, Equipment Failure Analysis, medicine.anatomical_structure, 030228 respiratory system, Anesthesia, Ventilation (architecture), Breathing, Equipment Failure, Noninvasive ventilation, business, Nasal cannula
Abstract: During both nasal noninvasive ventilation (NIV) and invasive ventilation of neonates, the presence of air leaks causes triggering and cycling asynchrony.Five ICU ventilators (PB840, PB980, Servo-i, V500, and Avea) were compared in available invasive ventilation and NIV ventilator modes (pressure control continuous spontaneous ventilation [PC-CSV] and pressure control continuous mandatory ventilation [PC-CMV]). The V500 and Avea do not provide PC-CSV and PC-CMV in NIV. The Servo-i and Avea were tested with and without their proximal flow sensor. The ASL 5000 lung model (version 3.5) was used to simulate 4 neonatal scenarios (body weight 0.5, 1, 2, and 4 kg). The ASL 5000 was ventilated via endotracheal tube (invasive ventilation) or nasal cannula (NIV) with 4 different leaks.The Avea (without flow sensor) during invasive ventilation and Servo-i and PB840 during NIV were not triggered by inspiratory efforts of the ASL 5000 at the baseline leak in the 0.5 kg scenario. In invasive ventilation, overall (median) asynchrony index was significantly lower with the PB980 (1%) and V500 (3%) than with the Servo-i (with flow sensor, 50%; without flow sensor, 50%) and Avea (with sensor, 50%; without sensor, 62%) (P.05 for all comparisons). The PB840 (33%) was significantly different from all ventilators (P.05). In NIV, the asynchrony index was significantly lower in PB980 (2%) than in the Servo-i (with sensor, 100%; without sensor, 100%) and PB840 (75%) (P.05 for both). There was no difference in asynchrony index between PC-CSV and PC-CMV in all tested conditions and ventilators.The ability of leak compensation to prevent asynchronous breathing varied widely between ventilators and lung mechanics. The PB980 and V500 were the only two ventilators to acclimate to all leak scenarios in invasive ventilation, and PB980 was the only ventilator to acclimate to all leak scenarios in NIV.
Published: 2016

25. Effect of High-Flow Nasal Cannula on Thoraco-Abdominal Synchrony in Pediatric Subjects After Cardiac Surgery

Author: Taiga Itagaki, Nobuto Nakanishi, Jun Oto, Emiko Nakataki, Masaji Nishimura, Mutsuo Onodera, and Nao Okuda
Subjects: Pulmonary and Respiratory Medicine, Male, medicine.medical_specialty, Periodicity, Respiratory rate, medicine.medical_treatment, Population, Critical Care and Intensive Care Medicine, medicine.disease_cause, 03 medical and health sciences, 0302 clinical medicine, Oxygen therapy, Abdomen, medicine, Cannula, Humans, Postoperative Period, Prospective Studies, Cardiac Surgical Procedures, education, Tidal volume, education.field_of_study, Cross-Over Studies, business.industry, Oxygen Inhalation Therapy, Rib Cage, Infant, General Medicine, Cardiac surgery, Plethysmography, Treatment Outcome, 030228 respiratory system, Respiratory failure, Anesthesia, Airway Extubation, Female, business, Respiratory Insufficiency, Nasal cannula, Respiratory minute volume
Abstract: BACKGROUND: We previously reported the effects of high-flow nasal cannula (HFNC) oxygen therapy on thoraco-abdominal synchrony. This study was designed to clarify the effect of HFNC on thoraco-abdominal synchrony in pediatric subjects after cardiac surgery and to investigate HFNC optimal flow in this population. METHODS: Thoraco-abdominal synchrony was evaluated with respiratory inductive plethysmography. After extubation, we delivered oxygen via face mask for 30 min to subjects with mild to moderate respiratory failure. Each subject then randomly received either 1 or 2 L/kg/min via HFNC for 30 min, followed by the other flow level via HFNC for 30 min. After HFNC, face mask delivery was resumed. Rib cage and abdominal movement were converted into volumes and 2 quantitative indexes: maximum compartmental amplitude/tidal volume (VT) ratio and phase angle. RESULTS: Ten subjects of median (interquartile range) age 7 (6–14) months and weighing 6.5 (5.3–8.8) kg were enrolled. Compared with the first delivery via face mask, breathing frequency, maximum compartmental amplitude/VT, phase angle, and minute volume significantly decreased at 2 L/kg/min (P CONCLUSIONS: After cardiac surgery, HFNC oxygen therapy at 2 L/kg/min improved thoraco-abdominal synchrony and decreased breathing frequency in pediatric subjects. (Clinical trial registration: UMIN000023426.)
Published: 2018

26. A case of severe air leak syndrome as a complication of bronchitis in a child with chronic lung disease who were survived by extracorporeal membrane oxygenation

Author: Taiga Itagaki, Jun Oto, Emiko Nakataki, Mayumi Sugimoto, Marie Nishikawa, Masaji Nishimura, Mutsuo Onodera, and Yumiko Tsunano
Subjects: business.industry, Medicine, business
Published: 2019

27. Electrical Activity of the Diaphragm During Reverse Triggering - A Case Report

Author: Taiga Itagaki, Yoshitoyo Ueno, Mutsuo Onodera, and Masaji Nishimura
Subjects: medicine.medical_specialty, Pressure control ventilation, Tricuspid valve, medicine.anatomical_structure, business.industry, Pressure waveform, Internal medicine, Diaphragm muscle, Cardiology, medicine, Diaphragmatic breathing, business, Tidal volume
Abstract: Reverse triggering is defined as diaphragmatic muscle contraction triggered by mandatory breath of ventilator. Reverse triggering induced double cycling and large tidal volume (VT) in Pressure Control Ventilation (PCV). An 81-year-old male was admitted to the ICU after tricuspid valve plasty. A close observation of graphic monitor showed a deflection of pressure waveform in the middle of mandatory breath. Electric activity of the diaphragm (EAdi) revealed diaphragmatic contraction following mandatory breath. When diaphragmatic contraction started at the end of mandatory breath it induced double-cycling. When it started at the middle of mandatory breath VT increased. As spontaneous breathing increased, reverse triggering disappeared. While the consequences of reverse triggering are under discussion, in our case it led double cycling and large VT, and it might be injurious. We should recognize it is more common than expected.
Published: 2017

28. The investigation of prognosis of hematological malignancies in ICU patients

Author: Hideaki Imanaka, Mutsuo Onodera, Nao Okuda, Yumiko Tsunano, Hisakazu Kohata, Taiga Itagaki, Emiko Nakataki, and Masaji Nishimura
Subjects: Icu patients, medicine.medical_specialty, business.industry, Internal medicine, medicine, business
Published: 2014

29. Reply to

Author: Yandong Jiang, Jeremi R. Mountjoy, and Taiga Itagaki
Subjects: 03 medical and health sciences, 0302 clinical medicine, Anesthesiology and Pain Medicine, Mask ventilation, Optics, 030202 anesthesiology, business.industry, Medicine, 030208 emergency & critical care medicine, business, Rotation
Published: 2018

30. High-Flow Nasal Cannula Devices: Noisier Than We Realize

Author: Taiga Itagaki and Masaji Nishimura
Subjects: Pulmonary and Respiratory Medicine, Sound (medical instrument), Oxygen inhalation therapy, business.industry, Acoustics, Oxygen Inhalation Therapy, General Medicine, Critical Care and Intensive Care Medicine, medicine.disease_cause, Cannula, World health, 03 medical and health sciences, Noise, 0302 clinical medicine, 030228 respiratory system, medicine, Humans, 030212 general & internal medicine, High flow, business, Nasal cannula
Abstract: Noise is unwanted sound. In rooms where patients are treated or observed, the World Health Organization advises that average sound levels should not exceed 35 dB during the day and 30 dB at night.[1][1] During the past 50 years, with more sound-producing devices coming into widespread use, daytime
Published: 2018

31. [Untitled]

Author: Emiko Nakataki, Masaji Nishimura, Jun Oto, Taiga Itagaki, and Nobuto Nakanishi
Subjects: medicine.anatomical_structure, Atrophy, business.industry, medicine, Anatomy, Critical Care and Intensive Care Medicine, business, medicine.disease, Intercostal muscle, Diaphragm (structural system)
Published: 2019

32. Urinary Titin Is a Novel Biomarker for Muscle Atrophy in Nonsurgical Critically Ill Patients: A Two-Center, Prospective Observational Study.

Author: Nobuto Nakanishi, Rie Tsutsumi, Kanako Hara, Takuya Takashima, Emiko Nakataki, Taiga Itagaki, Masafumi Matsuo, Jun Oto, Hiroshi Sakaue, Nakanishi, Nobuto, Tsutsumi, Rie, Hara, Kanako, Takashima, Takuya, Nakataki, Emiko, Itagaki, Taiga, Matsuo, Masafumi, Oto, Jun, and Sakaue, Hiroshi
Published: 2020
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33. Effect of controlled ventilation during assist-control ventilation on diaphragm thickness: a post hoc analysis of an observational study.

Author: Taiga Itagaki, Nobuto Nakanishi, Takuya Takashima, Yoshitoyo Ueno, Natsuki Tane, Yumiko Tsunano, Toshiyuki Nunomura, and Jun Oto
Subjects: DIAPHRAGM (Anatomy), OXIDATIVE stress, ARTIFICIAL respiration, MEDICAL statistics, ATROPHY
Abstract: Background: Since diaphragm passivity induces oxidative stress that leads to rapid atrophy of diaphragm, we investigated the effect of controlled ventilation on diaphragm thickness during assist-control ventilation (ACV). Methods: Previously, we measured end-expiratory diaphragm thickness (Tdiee) of patients mechanically ventilated for more than 48 hours on days 1, 3, 5 and 7 after the start of ventilation. We retrospectively investigated the proportion of controlled ventilation during the initial 48-hour ACV (CV48%). Patients were classified according to CV48%: Low group, less than 25%; High group, higher than 25%. Results: Of 56 patients under pressure-control ACV, Tdiee increased more than 10% in 6 patients (11%), unchanged in 8 patients (14%) and decreased more than 10% in 42 patients (75%). During the first week of ventilation, Tdiee decreased in both groups: Low (difference, -7.4%; 95% confidence interval [CI], -10.1% to -4.6%; p < 0.001) and High group (difference, -5.2%; 95% CI, -8.5% to -2.0%; p = 0.049). Maximum Tdiee variation from baseline did not differ between Low (-15.8%; interquartile range [IQR], -22.3 to -1.5) and High group (-16.7%; IQR, -22.6 to -11.1, p = 0.676). Conclusions: During ACV, maximum variation in Tdiee was not associated with proportion of controlled ventilation higher than 25%. J. [ABSTRACT FROM AUTHOR]
Published: 2020
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34. Performance of Leak Compensation in All-Age ICU Ventilators During Volume-Targeted Neonatal Ventilation: A Lung Model Study

Author: Desmond J Bennett, Christopher T Chenelle, Taiga Itagaki, Robert M. Kacmarek, and Daniel F Fisher
Subjects: Pulmonary and Respiratory Medicine, Leak, medicine.medical_treatment, Critical Care and Intensive Care Medicine, Manikins, Models, Biological, Continuous mandatory ventilation, law.invention, 03 medical and health sciences, 0302 clinical medicine, Interquartile range, law, 030225 pediatrics, medicine, Tidal Volume, Humans, Computer Simulation, Lung, Tidal volume, Mechanical ventilation, Ventilators, Mechanical, business.industry, Pressure control, Infant, Newborn, General Medicine, Respiration, Artificial, Intensive Care Units, medicine.anatomical_structure, 030228 respiratory system, Anesthesia, Ventilation (architecture), Equipment Failure, business
Abstract: BACKGROUND: Volume-targeted ventilation is increasingly used in low birthweight infants because of the potential for reducing volutrauma and avoiding hypocapnea. However, it is not known what level of air leak is acceptable during neonatal volume-targeted ventilation when leak compensation is activated concurrently. METHODS: Four ICU ventilators (Servo-i, PB980, V500, and Avea) were compared in available invasive volume-targeted ventilation modes (pressure control continuous spontaneous ventilation [PC-CSV] and pressure control continuous mandatory ventilation [PC-CMV]). The Servo-i and PB980 were tested with (+) and without (−) their proximal flow sensor. The V500 and Avea were tested with their proximal flow sensor as indicated by their manufacturers. An ASL 5000 lung model was used to simulate 4 neonatal scenarios (body weight 0.5, 1, 2, and 4 kg). The ASL 5000 was ventilated via an endotracheal tube with 3 different leaks. Two minutes of data were collected after each change in leak level, and the asynchrony index was calculated. Tidal volume (VT) before and after the change in leak was assessed. RESULTS: The differences in delivered VT between before and after the change in leak were within ±5% in all scenarios with the PB980 (−/+) and V500. With the Servo-i (−/+), baseline VT was ≥10% greater than set VT during PC-CSV, and delivered VT markedly changed with leak. The Avea demonstrated persistent high VT in all leak scenarios. Across all ventilators, the median asynchrony index was 1% (interquartile range 0–27%) in PC-CSV and 1.8% (0–45%) in PC-CMV. The median asynchrony index was significantly higher in the Servo-i (−/+) than in the PB980 (−/+) and V500 in 1 and 2 kg scenarios during PC-CSV and PC-CMV. CONCLUSIONS: The PB980 and V500 were the only ventilators to acclimate to all leak scenarios and achieve targeted VT. Further clinical investigation is needed to validate the use of leak compensation during neonatal volume-targeted ventilation.
Published: 2016

35. Characteristics of postoperative acute kidney injury (AKI) after conventional open vs. endovascular repair of infrarenal abdominal aortic aneurysm

Author: Shigehito Sato, Yushi U. Adachi, Matsuyuki Doi, Mutsuhito Kikura, and Taiga Itagaki
Subjects: medicine.medical_specialty, business.industry, Endovascular surgery, medicine, Acute kidney injury, Radiology, medicine.disease, business, Abdominal aortic aneurysm, Surgery
Published: 2012

36. Reverse triggering induced by endotracheal tube leak in lightly sedated ARDS patient

Author: Jun Oto, Taiga Itagaki, Nobuto Nakanishi, and Yoshitoyo Ueno
Subjects: ARDS, business.industry, Endotracheal tube leak, Sedation, lcsh:Medical emergencies. Critical care. Intensive care. First aid, 030208 emergency & critical care medicine, lcsh:RC86-88.9, Critical Care and Intensive Care Medicine, medicine.disease, 03 medical and health sciences, Esophageal pressure monitoring, 0302 clinical medicine, 030228 respiratory system, Anesthesia, medicine, Respiratory system, medicine.symptom, Entrainment (chronobiology), business, Letter to the Editor, Tidal volume
Abstract: Reverse triggering is respiratory entrainment triggered by the ventilator especially seen among heavily sedated patients. We confirmed reverse triggering induced by auto-triggering in lightly sedated patient through an esophageal pressure monitoring. The reverse triggering frequently caused breath stacking with increased tidal volume. Physicians should be aware, even at an optimal level of sedation, that reverse triggering can develop, possibly caused by auto-triggering.
Published: 2018

37. A novel method of post-pyloric feeding tube placement at bedside

Author: Taiga Itagaki, Emiko Nakataki, Hideaki Imanaka, Mutsuo Onodera, Masaji Nishimura, Nao Okuda, and Hisakazu Kohata
Subjects: Male, Novel technique, medicine.medical_specialty, Critical Care, Nostril, Critical Care and Intensive Care Medicine, Palpation, Body Mass Index, law.invention, Right hypochondriac region, Enteral Nutrition, law, medicine, Humans, Prospective Studies, Intubation, Gastrointestinal, Feeding tube, Pylorus, APACHE, Aged, medicine.diagnostic_test, business.industry, Middle Aged, Intensive care unit, Surgery, Intensive Care Units, medicine.anatomical_structure, Post pyloric feeding, Tube placement, Female, business
Abstract: Purpose Post-pyloric feeding tube placement is often difficult, and special equipment or peristalsis agents are used to aid insertion. Although several reports have described blind techniques for post-pyloric feeding-tube placement, no general consensus about method preference has been achieved. Materials and Methods The technique is performed as follows: via the nostril, a stylet-tipped feeding tube is advanced about 70 cm; to confirm tip location to the right of the epigastric area, towards the right hypochondriac region, 5 mL shots of air are injected to enable touch detection of bubbling; finally, the tube is advanced to a length of 100 cm, during which the strength of bubbling seems to diminish under palpation. Results We prospectively enrolled consecutive patients whose oral intake was expected to be difficult for 48 hours in the intensive care unit. Forty-one patients were enrolled and the rate of successful placement at first attempt was 95.1%. Mean duration for successful placement was 15 minutes. Conclusions With a novel technique, from the bedside, without special tools or drugs, we successfully placed post-pyloric feeding tubes. Essential points when inserting the tube are confirmation of the location of the tube tip by palpation of injected air, and to avoid deflection and looping.
Published: 2013

38. Nafamostat prevents hypothermia and improves survival time after administration of lipopolysaccharide in a mouse surgical model

Author: Shigehito Sato, Hiromi Katoh, Katsumi Suzuki, Yushi U. Adachi, Yukako Obata, Matsuyuki Doi, and Taiga Itagaki
Subjects: Lipopolysaccharides, Male, Methyl Ethers, Survival, medicine.medical_treatment, Hypothermia, Guanidines, Sevoflurane, Body Temperature, Mice, Heart Rate, medicine, Animals, Anesthesia, Protease Inhibitors, Saline, Disseminated intravascular coagulation, Analysis of Variance, Septic shock, business.industry, Thermoregulation, medicine.disease, Benzamidines, Mice, Inbred C57BL, Nafamostat, Anesthesiology and Pain Medicine, Surgical Procedures, Operative, Anesthetics, Inhalation, Systemic administration, medicine.symptom, business, medicine.drug
Abstract: Lipopolysaccharide (LPS) is an endotoxin known to induce disseminated intravascular coagulation and multiple organ failure followed by septic shock in animals. Nafamostat is a synthetic protease inhibitor with anticoagulant effects. This study investigated the effect of systemic administration of nafamostat on thermogenic homeostasis and survival time in a mouse surgical model. Male C57Bl/6 mice were anesthetized with sevoflurane and implanted with intraabdominal telemetry transmitters. Following the surgery, three groups of animals were administered Escherichia coli LPS (0127: B8) subcutaneously at doses of 0.3, 1.0, or 3.0 mg kg(-1), and one group received saline without LPS. Three other groups received 3 mg.kg(-1) LPS with 1, 3, or 10 mg kg(-1) of nafamostat. In another group 10 mg kg(-1)1 of nafamostat only was administered. The times to the onset of hypothermia (body temperature < 30 degrees C) and death were determined. L LPS significantly shortened the duration of both normothermia and survival, and nafamostat prolonged the normothermic periods that were reduced b 3 mg.kg(-1) LPS. Survival time was significantly correlated with the duration of normothermia (n = 48; r (2) = 0.779; P < 0.000001). The results demonstrated the effect of systemic administration of nafamostat against LPS-induced hypothermia. Nafamostat prevented hypothermia, and the consequent normal thermoregulation may have prolonged the survival period.
Published: 2009

39. The effectiveness of nasal mask vs face mask ventilation in anesthetized, apneic pediatric subjects over 2 years of age: a randomized controlled trial

Author: Robert M. Kacmarek, Yandong Jiang, Puneet Sayal, Tatyana A. Gubin, Thomas Anthony Anderson, and Taiga Itagaki
Subjects: Male, Adolescent, Apnea, medicine.medical_treatment, Peak inspiratory pressure, law.invention, 03 medical and health sciences, Nasal mask, 0302 clinical medicine, Randomized controlled trial, 030202 anesthesiology, law, medicine, Tidal Volume, Humans, Anesthesia, Child, Mask ventilation, Ventilators, Mechanical, business.industry, Masks, 030208 emergency & critical care medicine, Equipment Design, respiratory system, Airway obstruction, medicine.disease, Respiration, Artificial, respiratory tract diseases, Anesthesiology and Pain Medicine, Anesthesia ventilator, Child, Preschool, Pediatrics, Perinatology and Child Health, Breathing, Airway management, Female, business, circulatory and respiratory physiology
Abstract: Summary Background We hypothesized that anesthetized, apneic children could be ventilated equivalently or more efficiently by nasal mask ventilation (NMV) than face mask ventilation (FMV). The aim of this randomized controlled study was to test this hypothesis by comparing the expiratory tidal volume (Vte) between NMV and FMV. Methods After the induction of anesthesia, 41 subjects, 3–17 years of age without anticipated difficult mask ventilation, were randomly assigned to receive either NMV or FMV with neck extension. Both groups were ventilated with pressure control ventilation (PCV) at 20 cmH2O of peak inspiratory pressure (PIP) with positive end-expiratory pressure (PEEP) levels of 0, 5, and 10 cmH2O. An additional mouth closing maneuver (MCM) was applied for the NMV group. Results The Vte was higher in the FMV group compared with the NMV group (median difference [95% CI]: 8.4 [5.5–11.6] ml·kg−1; P
Published: 2015

40. [Vocal cord paralysis associated with tracheal intubation: incidence, risk analysis, and classification of severity]

Author: Mutsuhito, Kikura, Yuji, Suzuki, Taiga, Itagaki, Tsunehisa, Sato, and Junko, Nishino
Subjects: Cardiovascular Diseases, Intubation, Intratracheal, Humans, Prognosis, Risk Assessment, Severity of Illness Index, Vocal Cord Paralysis
Abstract: Vocal cord paralysis after tracheal intubation is rare. It causes severe hoarseness and aspiration, and delays recovery and discharge. Arytenoid cartilage dislocation and recurrent nerve paralysis are main causes of vocal cord paralysis. Physical stimulation of the tracheal tube as well as patient and surgical characteristics also contribute. Vocal cord paralysis occurs in 1 (0.07%) of 1,500 general surgery patients and on the left side in 70% of cases. It is associated with surgery/anesthesia time (two-fold, 3-6 hours; 15-fold, over 6 hours), age (three-fold, over 50 years), and diabetes mellitus or hypertension (two-fold). Symptoms resolve in 2-3 months. In adult cardiovascular surgery, vocal cord paralysis occurs in 1 (0.7-2%) of 50-100 cardiac surgery patients and 1 (8.6-32%) of 3-10 thoracic aortic surgery patients. In pediatric cardiac surgery, vocal cord paralysis occurs in 1 (0.1-0.5%) of 200-1,000 patients. We classified the severity of vocal cord paralysis as I, severe hoarseness; II, aspiration or dysphagia; and III, bilateral vocal cord paralysis, aspiration pneumonia, or the need for tracheal re-intubation or tracheotomy. We discuss the importance of informed consent for the patient and family.
Published: 2015

41. [Delayed discharge from the intensive care unit]

Author: Nao, Okuda, Yumiko, Tsunano, Hisakazu, Kohata, Emiko, Nakataki, Taiga, Itagaki, Mutsuo, Onodera, Hideaki, Imanaka, and Masaji, Nishimura
Subjects: Adult, Male, Cross Infection, Time Factors, Middle Aged, Respiration, Artificial, Patient Discharge, Intensive Care Units, Catecholamines, Patients' Rooms, Humans, Female, Assisted Circulation, Hemofiltration, Aged, Retrospective Studies
Abstract: Delayed discharge from ICU to the general ward can exert an adverse effect. We researched whether patients are discharged smoothly from our ICU to the general ward.We defined that patients were eligible for discharge if they are without administration of catecholamine, being assisted by mechanical ventilation and having blood purification therapy.Average time from actual discharge to the time patient was considered eligible for discharge was fifteen hours. This study was retrospective.We need to investigate further the reasons why delayed discharge occurred. It is im portant that patients are discharged from the ICU to the general ward properly. Delayed discharge can delay the recovery and expose the patient to multi-resistant microorganisms. We studied whether patients are discharged smoothly from the ICU to the general ward.
Published: 2015

42. Humidification Performance of Passive and Active Humidification Devices Within a Spontaneously Breathing Tracheostomized Cohort.

Author: Nobuto Nakanishi, Jun Oto, Taiga Itagaki, Emiko Nakataki, Mutsuo Onodera, and Masaji Nishimura
Subjects: REACTIVE oxygen species, APACHE (Disease classification system), ARTIFICIAL respiration, CAPNOGRAPHY, CARDIAC arrest, COMPARATIVE studies, CROSSOVER trials, HUMIDITY, OXYGEN in the body, RESPIRATORY measurements, RESPIRATORY insufficiency, STATISTICAL hypothesis testing, STATISTICS, TEMPERATURE, TRACHEA intubation, TRACHEOTOMY, DATA analysis, CONTINUING education units, DATA analysis software, DESCRIPTIVE statistics, ONE-way analysis of variance, FRIEDMAN test (Statistics)
Abstract: BACKGROUND: Most heat-and-moisture exchangers (HMEs) for patients with tracheostomy and spontaneously breathing are small and have suction ports that allow some expiratory gas to escape, which loses vapor held in the expired gas. Recently, a heated-and-humidified high-flow system for spontaneously breathing patients with tracheostomy was developed. Little is known, however, about the humidifying performance of HMEs or heated-and-humidified high-flow systems for spontaneous breathing patients with a tracheostomy. OBJECTIVE: To investigate the humidifying performance of the HMEs and heated-and-humidified high-flow systems for spontaneously breathing patients with tracheostomy. METHODS: Adult spontaneously breathing subjects with tracheostomy and were enrolled when their respiratory parameters and ... were stable. We measured absolute humidity, relative humidity, and temperature by using a capacitance-type moisture sensor at the outlet of the tracheostomy tube. Heated-and-humidified high flow was delivered via the a humidifier and tracheostomy interface, and a selected HME. The subjects received heated-and-humidified high flow, after which an HME was used for humidification before switching back to a heated-and-humidified high-flow system. RESULTS: Ten subjects (5 men, 5 women; mean ± SD age, 72 ± 12 y) were enrolled. The admission diagnoses were neurologic (5 subjects), respiratory failure (3), and cardiac arrest (2). The APACHE (Acute Physiology and Chronic Health Evaluation) II score was 24 (interquartile range, 20-27). Tracheostomy was performed on day 7 (interquartile range, 5-11 d) after endotracheal intubation, and the duration of mechanical ventilation was 10 d (interquartile range, 6-11 d). The temperature with the HME was 29.9 ± 1.0°C and, during heated-and-humidified high-flow use was 35.3 ± 0.8°C (P < .001). With both the HME and the heated-and-humidified high-flow system, the relative humidity reached 100%; the absolute humidity with HME was 30.2 ± 1.8 mg/L, and, with the heated-and-humidified high-flow system, was 40.3 ± 1.8 mg/L (P < .001). CONCLUSIONS: In spontaneously breathing subjects with tracheostomy, an heated-and-humidified high-flow system achieved higher absolute humidity than did an HME. [ABSTRACT FROM AUTHOR]
Published: 2019
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43. Effect of High-Flow Nasal Cannula on Thoraco-Abdominal Synchrony in Pediatric Subjects After Cardiac Surgery.

Author: Taiga Itagaki, Nobuto Nakanishi, Nao Okuda, Emiko Nakataki, Mutsuo Onodera, Jun Oto, and Masaji Nishimura
Subjects: RESPIRATORY insufficiency treatment, ACADEMIC medical centers, ANALYSIS of variance, CONFIDENCE intervals, CROSSOVER trials, CARDIAC surgery, LONGITUDINAL method, OXYGEN therapy, PLETHYSMOGRAPHY, RESPIRATORY measurements, STATISTICAL sampling, TREATMENT effectiveness, CONTINUING education units, DATA analysis software, RESPIRATORY mechanics, DESCRIPTIVE statistics, NASAL cannula, CHILDREN
Abstract: BACKGROUND: We previously reported the effects of high-flow nasal cannula (HFNC) oxygen therapy on thoraco-abdominal synchrony. This study was designed to clarify the effect of HFNC on thoraco-abdominal synchrony in pediatric subjects after cardiac surgery and to investigate HFNC optimal flow in this population. METHODS: Thoraco-abdominal synchrony was evaluated with respiratory inductive plethysmography. After extubation, we delivered oxygen via face mask for 30 min to subjects with mild to moderate respiratory failure. Each subject then randomly received either 1 or 2 L/kg/min via HFNC for 30 min, followed by the other flow level via HFNC for 30 min. After HFNC, face mask delivery was resumed. Rib cage and abdominal movement were converted into volumes and 2 quantitative indexes: maximum compartmental amplitude/tidal volume (VT) ratio and phase angle. RESULTS: Ten subjects of median (interquartile range) age 7 (6-14) months and weighing 6.5 (5.3- 8.8) kg were enrolled. Compared with the first delivery via face mask, breathing frequency, maximum compartmental amplitude/VT, phase angle, and minute volume significantly decreased at 2 L/kg/min (P < .05 for all) but not at 1 L/kg/min. PaCO2 did not differ among oxygen therapies. None of the measured variables differed between first and second face mask periods. CONCLUSIONS: After cardiac surgery, HFNC oxygen therapy at 2 L/kg/min improved thoraco-abdominal synchrony and decreased breathing frequency in pediatric subjects. (Clinical trial registration: UMIN000023426.) [ABSTRACT FROM AUTHOR]
Published: 2019
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44. Hyperoxemia in mechanically ventilated, critically ill subjects: incidence and related factors

Author: Mutsuo Onodera, Nao Okuda, Masayo Izawa, Yuuki Nakano, Taiga Itagaki, Hideaki Imanaka, and Masaji Nishimura
Subjects: Pulmonary and Respiratory Medicine, Male, medicine.medical_specialty, medicine.medical_treatment, Critical Illness, Hyperoxia, Critical Care and Intensive Care Medicine, Risk Assessment, Japan, Interquartile range, Risk Factors, medicine, Intubation, Humans, Aged, Retrospective Studies, Mechanical ventilation, Respiratory Care Units, business.industry, Medical record, Incidence (epidemiology), Incidence, Hyperoxemia, General Medicine, Oxygenation, Middle Aged, Respiration, Artificial, Surgery, Oxygen, Anesthesia, Arterial blood, Female, Blood Gas Analysis, business, Follow-Up Studies
Abstract: Excessive supplemental oxygen causes injurious hyperoxemia. Before establishing the best P(aO2) targets for mechanically ventilated patients, it is important to understand the incidence of hyperoxemia and related factors. We investigated oxygenation in mechanically ventilated subjects in our ICU and evaluated factors related to hyperoxemia (P(aO2)120 mm Hg) at 48 h after initiation of mechanical ventilation.We retrospectively reviewed the medical records of patients admitted to our ICU from January 2010 to May 2013. Inclusion criteria were 15 y of age or older and administration of mechanical ventilation for48 h. Patients at risk of imminent death on admission or who had received noninvasive ventilation were excluded. We collected subject demographics, reasons for mechanical ventilation, and during mechanical ventilation, we collected arterial blood gas data and ventilator settings on the first day of intubation (T1), 48 h after initiation of mechanical ventilation (T2), and on the day of extubation (T3). Multivariable logistic regression analysis was performed to clarify independent variables related to hyperoxemia at T2.For the study period, data for 328 subjects were analyzed. P(aO2) statistically significantly increased over time to 90 (interquartile range of 74-109) mm Hg at T1, 105 (89-120) mm Hg at T2, and 103 (91-119) mm Hg at T3 (P.001), coincident with decreases in F(IO2) of 0.4 (0.3-0.5) at T1, 0.3 (0.3-0.4) at T2, and 0.3 (0.3-0.35) at T3 (P.001). Hyperoxemia occurred in 15.6% (T1), 25.3% (T2), and 22.4% (T3) of subjects. Multivariable logistic regression analysis revealed that hyperoxemia was independently associated with age of40 y (odds ratio 2.6, 95% CI 1.1-6.0), Acute Physiology and Chronic Health Evaluation II scores of ≥ 30 (odds ratio 0.53, 95% CI 0.3-1.0), and decompensated heart failure (odds ratio 1.9, 95% CI 1.1 to 3.5).During mechanical ventilation of critically ill subjects, P(aO2) increased, and F(IO2) decreased. One in 4 subjects were hyperoxemic at T2, and hyperoxemia persisted until T3.
Published: 2014

45. Complete bronchial obstruction by granuloma in a paediatric patient with translaryngeal endotracheal tube: a case report

Author: Emiko Nakataki, Taiga Itagaki, Masaji Nishimura, Hideaki Imanaka, Nao Okuda, and Mutsuo Onodera
Subjects: Male, Budesonide, medicine.medical_specialty, medicine.medical_treatment, Forceps, Anti-Inflammatory Agents, Case Report, Lasers, Solid-State, Bronchoscopy, Translaryngeal endotracheal tube, Administration, Inhalation, Intubation, Intratracheal, medicine, Humans, Intubation, Medicine(all), Granuloma, Inhalation, medicine.diagnostic_test, business.industry, Bronchial obstruction, Infant, Bronchial Diseases, General Medicine, respiratory system, Airway obstruction, medicine.disease, Combined Modality Therapy, Surgery, Airway Obstruction, Stenosis, business, medicine.drug
Abstract: Introduction: Although continuous or frequent stimuli in tracheostomized patients may cause tracheal granulomas, little is known about management of patients with translaryngeal intubation. Case presentation: A 1-month-old Japanese boy, weighing 3.5kg, was admitted to our hospital owing to cardiac failure caused by an atrial septal defect and intractable arrhythmia. To treat his unstable cardiovascular status, surgery was performed to close his atrial septal defect. After the operation, stenosis was detected by auscultation and flow limitation worsened. A bronchoscopy revealed granulomas completely obstructing his right bronchus and partially obstructing his left bronchus. Dexamethasone infusion partially reduced the mass, after which removal by yttrium aluminium garnet laser was tried. The airway obstruction was not resolved, however, because of granuloma reproliferation. Budesonide (aerosol liquid) inhalation was started, and tissue was reduced using an yttrium aluminium garnet laser and physically removed using forceps. After continued budesonide inhalation, he was successfully liberated from the ventilator. Conclusions: Life-threatening airway obstruction by granulomas developed in a translaryngeally intubated paediatric patient. The granuloma was detected after a couple of weeks of intubation. A bronchial granuloma is rare in paediatric patients. It should be suspected with evidence of bronchial obstruction. Treatment with corticosteroids and surgery using a laser maybe indicated.
Published: 2014

46. Humidification performance of two high-flow nasal cannula devices: a bench study

Author: Yusuke Chikata, Masaji Nishimura, Nao Okuda, Masayo Izawa, Taiga Itagaki, Hideaki Imanaka, Mutsuo Onodera, and Emiko Nakataki
Subjects: Pulmonary and Respiratory Medicine, medicine.medical_specialty, Ventilator circuit, Catheters, Respiratory rate, Critical Care and Intensive Care Medicine, medicine.disease_cause, Models, Biological, Heating, Mechanical ventilator, Respiratory Rate, medicine, Tidal Volume, Humans, Tidal volume, business.industry, Oxygen Inhalation Therapy, Humidity, General Medicine, Surgery, Medical gas supply, Inhalation, Anesthesia, Breathing, High flow, business, Nasal cannula
Abstract: Delivering heated and humidified medical gas at 20-60 L/min, high-flow nasal cannula (HFNC) creates low levels of PEEP and ameliorates respiratory mechanics. It has become a common therapy for patients with respiratory failure. However, independent measurement of heat and humidity during HFNC and comparison of HFNC devices are lacking.We evaluated 2 HFNC (Airvo 2 and Optiflow system) devices. Each HFNC was connected to simulated external nares using the manufacturer's standard circuit. The Airvo 2 outlet-chamber temperature was set at 37°C. The Optiflow system incorporated an O2/air blender and a heated humidifier, which was set at 40°C/3. For both systems, HFNC flow was tested at 20, 40, and 50 L/min. Simulating spontaneous breathing using a mechanical ventilator and TTL test lung, we tested tidal volumes (VT) of 300, 500, and 700 mL, and breathing frequencies of 10 and 20 breaths/min. The TTL was connected to the simulated external nares with a standard ventilator circuit. To prevent condensation, the circuit was placed in an incubator maintained at 37°C. Small, medium, and large nasal prongs were tested. Absolute humidity (AH) of inspired gas was measured at the simulated external nares.At 20, 40, and 50 L/min of flow, respective AH values for the Airvo 2 were 35.3 ± 2.0, 37.1 ± 2.2, and 37.6 ± 2.1 mg/L, and for the Optiflow system, 33.1 ± 1.5, 35.9 ± 1.7, and 36.2 ± 1.8 mg/L. AH was lower at 20 L/min of HFNC flow than at 40 and 50 L/min (P.01). While AH remained constant at 40 and 50 L/min, at 20 L/min of HFNC flow, AH decreased as VT increased for both devices.During bench use of HFNC, AH increased with increasing HFNC flow. When the inspiratory flow of spontaneous breathing exceeded the HFNC flow, AH was influenced by VT. At all experimental settings, AH remained30 mg/L.
Published: 2013

47. Effect of high-flow nasal cannula on thoraco-abdominal synchrony in adult critically ill patients

Author: Hideaki Imanaka, Nao Okuda, Emiko Nakataki, Taiga Itagaki, Masaji Nishimura, Yumiko Tsunano, Hisakazu Kohata, and Mutsuo Onodera
Subjects: Pulmonary and Respiratory Medicine, Male, Catheters, Respiratory rate, medicine.medical_treatment, Critical Illness, Movement, Nose, Critical Care and Intensive Care Medicine, medicine.disease_cause, Oxygen therapy, Abdomen, Medicine, Humans, Prospective Studies, Respiratory system, Tidal volume, Aged, Noninvasive Ventilation, business.industry, Oxygen Inhalation Therapy, General Medicine, Middle Aged, Thorax, Respiratory failure, Anesthesia, Breathing, Respiratory Mechanics, Arterial blood, Female, business, Respiratory Insufficiency, Nasal cannula
Abstract: BACKGROUND: High-flow nasal cannula (HFNC) creates positive oropharyngeal airway pressure and improves oxygenation. It remains unclear, however, whether HFNC improves thoraco-abdominal synchrony in patients with mild to moderate respiratory failure. Using respiratory inductive plethysmography, we investigated the effects of HFNC on thoraco-abdominal synchrony. METHODS: We studied 40 adult subjects requiring oxygen therapy in the ICU. Low-flow oxygen (up to 8 L/min) was administered via oronasal mask for 30 min, followed by HFNC at 30–50 L/min. Respiratory inductive plethysmography transducer bands were circumferentially placed: one around the rib cage, and one around the abdomen. We measured the movement of the rib-cage and abdomen, and used the sum signal to represent tidal volume (VT) during mask breathing, and at 30 min during HFNC. We calculated the ratio of maximum compartmental amplitude (MCA) to VT, and the phase angle. We assessed arterial blood gas and vital signs at each period, and mouth status during HFNC. We used multiple regression analysis to identify factors associated with improvement in thoraco-abdominal synchrony. RESULTS: During HFNC, breathing frequency significantly decreased from 25 breaths/min (IQR 22–27 breaths/min) to 21 breaths/min (IQR 18–24 breaths/min) ( P < .001), and MCA/VT ( P < .001) and phase angle ( P = .047) significantly improved. CONCLUSIONS: HFNC improved thoraco-abdominal synchrony in adult subjects with mild to moderate respiratory failure.
Published: 2013

48. Evaluation of the Augmented Infant Resuscitator: A Monitoring Device for Neonatal Bag-Valve-Mask Resuscitation.

Author: Bennett, Desmond J., Taiga Itagaki, Chenelle, Christopher T., Bittner, Edward A., and Kacmarek, Robert M.
Published: 2018
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49. Thiamylal sodium-induced leukopenia in a patient of tardive dystonia

Author: Taiga Itagaki, Emiko Nakataki, Nao Okuda, Hideaki Imanaka, Masaji Nishimura, Natsuki Tane, Hisakazu Kohata, and Mutsuo Onodera
Subjects: Leukopenia, business.industry, Anesthesia, Thiamylal sodium, medicine, Tardive Dystonia, medicine.symptom, business
Published: 2014

50. Obstetric intensive care unit admission: an 11-year retrospective study

Author: Emiko Nakataki, Hisakazu Kohata, Taiga Itagaki, Mutsuo Onodera, Masaji Nishimura, Hiroyuki Konami, Yuri Matsumoto, and Hideaki Imanaka
Subjects: medicine.medical_specialty, law, business.industry, Emergency medicine, medicine, Retrospective cohort study, Medical emergency, medicine.disease, business, Intensive care unit, law.invention
Published: 2014

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