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Abstract Tracheopathia osteochondroplastica (TO) is a rare and benign condition. It typically manifests as multiple osteocartilaginous nodules in the submucosa of the central airway. TO‐related clinical symptoms and physical signs are nonspecific. The bronchoscopic examination is helpful in establishing the diagnosis. Treatment for TO is mostly conservative and symptom‐oriented. The prognosis of TO is generally good, although cases of associated airway stenosis have been reported. In this case report, we describe the clinical, imaging, and histological features, and videoed bronchoscopic findings, of a middle‐aged male patient with incidentally diagnosed TO.

Background: Asthma and allergic diseases have increased in recent decades and are more common in industrialized countries. Industrial areas with a considerably high number of inhabitants and vehicles can favor the presence of serious air pollution and therefore the appearance and exacerbation of respiratory allergy symptoms. The objective of this study was to determine the relationship between exposure to environmental pollutants with exacerbation of respiratory allergy. Methods: A total of 240 subjects above 6 years old who lived in the metropolitan area of Monterrey, Nuevo León, Mexico, with diagnosis of allergic rhinitis and/or asthma, were included. The subject's address was registered in the database and the rhinitis control assessment test (RCAT) and the asthma control test (ACT) were applied. Environmental data were obtained from the Environmental Monitoring System (SIMA) of Nuevo León. Geolocation of industries and avenues in proximity of subject's addresses and SIMA stations were obtained through geographic information systems using ArcGis software. Results: The relation between pollutants and subjects’ RCAT, ACT, and spirometry results in the 14 stations was established. PM10 and forced vital capacity (FVC) had an r = 0.074 with p = 0.005, PM10 and absolute FEV1/FVC ratio presented an r = −0.102 with a p = 0.000; The distance found to be associated with a worsening of respiratory symptoms was living 165 m from a main road or 241 m from an industrial establishment. Conclusions: Exposure to pollutants present in the environment are factors associated with increased symptoms in subjects with respiratory allergies.

Key message Congenital anomalies of the large airways are occasionally asymptomatic and are incidentally discovered through radiography, often using computed tomography. Bronchoscopy can aid in the direct visual examination of the large airway abnormalities detected on radiography.

Background: Preoperative airway assessment is essential to predict difficult airway so that adequate planning could be made to secure the airway. Various airway tests have been devised to improve diagnostic accuracy but none of the tests individually have proven to be adequate. Recently, a new airway predictor thyromental height test (TMHT) appears to be a more accurate predictor of difficult laryngoscopy than the existing anatomical measurements. The aim of this study is to evaluate the accuracy of the TMHT and compare it with various screening tests to determine whether TMHT can prove to be a more comprehensive and accurate test for predicting difficult laryngoscopy. Total 150 patients aged > 18 years of either sex with American Society of Anaesthesiologist physical status I—III scheduled for elective surgery under general anaesthesia requiring tracheal intubation were included in this prospective observational study. All patients were subjected to a preoperative airway assessment test including TMHT, modified Mallampati test, upper lip bite test, interincisior gap, thyromental distance and sternomental distance. Intraoperatively direct laryngoscopy was done and the grading of laryngoscopic view was done according to CL. Results: The preoperative data and CL grading were used to evaluate the accuracy of TMHT and compared the sensitivity, specificity, positive and negative predictive value with other tests. Twenty six (17.33%) patients had difficult laryngoscopy and 18 patients (12%) required bougie/stylet to facilitate intubation. TMHT had the highest sensitivity (76.92%), specificity (98.38%), PPV (90.90%), NPV (95.31%) and accuracy (94.67%) when compared to other tests. Conclusions: TMHT is a simple bedside test with higher sensitivity and specificity for predicting difficult laryngoscopy as compared to other screening tests.Future study should be done to define ethinicity, race, age groups and gender specific cut off values of TMHT for accurate validation of prediction in difficult laryngoscopy. [ABSTRACT FROM AUTHOR]

Background and Aims: In the present study, we hypothesised that the laryngeal mask airway (LMA) Protector would provide higher oropharyngeal leak pressure (OLP) than LMA ProSeal. Thus, we planned this study to compare the clinical performance of LMA Protector and LMA ProSeal in terms of OLP as a primary objective and insertion characteristics as secondary objectives. Methods: Ninety patients of either gender, aged 18–70 years, were randomised into groups PS (LMA ProSeal) and P (LMA Protector). Following anaesthetic induction, the device was inserted as per group allocation. OLP of both devices was taken as a primary objective. Secondary objectives such as insertion time, ease of insertion, number of attempts required, fibre-optic view grading, amount of air (mL) required to get a cuff pressure (CP) of 60 cm H2O, and CP adjustment required and complications, if any, were also noted. Data were analysed using coGuide statistics software, Version 1 (BDSS Corp. Bangalore, Karnataka, India). Results: The median (interquartile range) OLP was significantly higher with LMA protector than with LMA ProSeal [33.00 (27.0, 36.0) versus [29.50 (26.0, 32.0) (P = 0.009)]. First-attempt success rate was 95.4% (42/44) in group PS and 93% (40/43) in group P. Insertion time, ease of insertion, and fibre-optic view grading were not different between the groups. Gastric tube placement failed in one patient in group PS and in three patients in group P (P = 0.606). The median amount of air (mL) required to get a CP of 60 cm H2O was 26.5 (20, 28) in group PS and 12 (8,13) in group P (95% confidence interval [CI] =10.808–14.575) (P < 0.001). At all time points, CP was significantly higher, and more CP adjustments were needed in group PS than in group P (P < 0.001). Incidence of blood staining and post-operative sore throat at 1 and 24 h were not different between the groups. Conclusion: LMA Protector provided a significantly higher OLP and less requirement of CP adjustments but comparable first-attempt success rate, mean insertion time, fibre-optic view, and gastric tube insertion as compared to LMA ProSeal. [ABSTRACT FROM AUTHOR]

Background: Retropharyngeal hematoma is a rare but life-threatening situation and may require emergency tracheostomy or surgical drainage if the airway is compromised. We present a case of a retropharyngeal hematoma with shown active submucosal bleeding and describe the novel approach taken for compression and control of the hemorrhage. Case presentation: A 76-year-old man presented to our institution complaining of dysphagia and pharyngeal discomfort hematoma since that morning. The laryngoscopy showed a hematoma of the posterior wall of the hypopharynx. A computerized tomography scan with contrast was done, demonstrating a collection in the retropharyngeal space, and a small active vessel could be identified. The patient was intubated, and compression was performed in the location of the retropharyngeal hematoma using the esophageal balloon of a Blakemore tube, with successful control of the active bleed. Conclusions: Retropharyngeal hematoma can be fatal, and we present a unique solution that can be used to successfully stop the bleeding while avoiding more invasive strategies, by performing compression with a Blakemore esophageal balloon to stop the bleeding. [ABSTRACT FROM AUTHOR]

Summary: Emergency airway management events are common, unpredictable and associated with high complication rates. This multicentre prospective observational study across eight acute NHS hospitals in southeast England reports the incidence and nature of non‐theatre emergency airway management events. Data were collected from non‐theatre emergency airway management, including adverse events, over a continuous 28‐day window, and recorded on an electronic case report form. Events were classified according to type (advanced airway; simple airway; and cardiac arrest). A total of 166 events were recorded, with 111 advanced airway events involving tracheal intubation or tracheostomy management. Senior personnel with three or more years of airway management experience were present for 105/111 (95%) advanced airway management episodes. There was a significant reduction in consultant or equivalent presence out‐of‐hours (21/64, 33%) vs. in‐hours (34/47, 72%) (p < 0.001). We found high utilisation of videolaryngoscopy (95/106, 90%) and universal use of capnography for all advanced airway management events. This was lower during cardiac arrest when videolaryngoscopy was used in 11/16 (69%) of tracheal intubations and capnography in 21/32 (66%) of all cardiac arrest episodes. Adverse outcomes during advanced airway management (excluding during cardiac arrest) occurred in 53/111 (48%) episodes, including hypoxia (desaturation to SpO2 < 80% in 14/111, 13%) and hypotension (systolic blood pressure < 80 mmHg in 27/111, 25%). Adverse outcomes were not associated with time of day or experience level of airway practitioners. We conclude that there is a disparity between consultant presence for advanced airway interventions in‐ and out‐of‐hours; high utilisation of videolaryngoscopy and capnography, especially for advanced airway interventions; and a high incidence of hypotension and hypoxaemia, including critical values, during non‐theatre airway management. [ABSTRACT FROM AUTHOR]

Prevention of arterial oxygen desaturation during anaesthesia with high-flow nasal oxygen (HFNO) has gained greater acceptance for a widening range of procedures. However, during HFNO use there remains the potential for development of significant anaesthesia-associated apnoea or hypoventilation and the possibility of hypercarbia, with harmful cardiovascular or neurological sequelae. The aim of this study was to determine whether any HFNO-related hypercarbia adverse incidents had been reported on webAIRS, an online database of adverse anaesthesia-related incidents. Two relevant reports were identified of complications due to marked hypercarbia during HFNO use to maintain oxygenation. In both reports, HFNO and total intravenous anaesthesia were used during endoscopic procedures through the upper airway. In both, the extent of hypoventilation went undetected during HFNO use. An ensuing cardiac arrest was reported in one report, ascribed to acute hypercarbia-induced exacerbation of the patient's pre-existing pulmonary hypertension. In the other report, hypercarbia led to a prolonged duration of decreased level of consciousness post procedure, requiring ventilatory support. During the search, an additional 11 reports of postoperative hypercarbia-associated sedation were identified, unrelated to HFNO. In these additional reports an extended duration of severe acute hypercarbia led to sedation or loss of consciousness, consistent with the known effects of hypercarbia on consciousness. These 13 reports highlight the potential dangers of unrecognised and untreated hypercarbia, even if adequate oxygenation is maintained. [ABSTRACT FROM AUTHOR]

Introduction: The laryngeal mask airway (LMA) is a widely used device in anesthetic practice. Proper depth of anesthesia is crucial to avoid complications. Entropy is an effective tool to measure anesthesia depth. LMA implantation requires sufficient anesthesia depth. LMA insertion can be challenging, and clinical indicators such as oropharyngeal leak pressure (OPLP) can be used to assess LMA accuracy. Aims and Objectives: To analyze the depth of anesthesia and position of laryngeal mask airway in pediatric population. Methods: The study was conducted from April 2022 to March 2023 on 140 patients undergoing surgery in a hospital. Anaesthesia was administered to all patients by a senior medical student or a consultant paediatric anesthesiologist. A single-use LMA was inserted, and cuff pressure was monitored. Sevoflurane was used to administer volatile-based anaesthesia. Patients were randomly assigned to one of four groups for the removal of the LMA using different techniques: Lateral Deep, Lateral Awake, Supine Deep, and Supine Awake. Each group had 35 patients, and the study aimed to avoid bias while reflecting standard practice. Results: There were statistically considerable variations between the subgroups (P=0.001), and the LMA was successfully released with the fewest difficulties when it was performed in the lateral position under a deep plane of anaesthesia. There was a statistically significant distinction between the parties in terms of the score for 'Clinical Importance' (P=0.001); the highest risk was observed when the LMA was removed from deeply sedated individuals who were lying supine. Conclusion: The study has concluded that it is best to turn the patient into lateral position before removing the laryngeal mask airway, whether the patient is in deep plane of anaesthesia or the patient is awake. [ABSTRACT FROM AUTHOR]

Airway-related articles have featured heavily in the British Journal of Anaesthesia since it was founded in 1923. In the 100 years thereafter, 1102 airway-related articles have been published in the journal, written by 2955 unique authors from 55 different countries. In this editorial, we highlight some of the major publications in airway management and their impact on the specialty. Summaries of the most cited articles are contained within online supplementary material as well as links to all airway-related articles for readers who wish to delve deeper into this body of work. [ABSTRACT FROM AUTHOR]

This article discusses a study published in the Korean Journal of Orthodontics that examined the pharyngeal airway space (PAS) in patients with anterior open bite (AOB) compared to those with normal occlusion. The study found that individuals with AOB had a narrower PAS and smaller volumes in certain pharyngeal segments, suggesting a different oral structure. However, there was no correlation between the amount of anterior overbite and changes in the PAS. The study acknowledges the need for further research and highlights the importance of evaluating the PAS in patients with AOB. [Extracted from the article]

As common clinical screening tests cannot effectively predict a difficult airway, and unanticipated difficult laryngoscopy remains a challenge for physicians. We herein used ultrasound to develop some point-of-care predictors for difficult laryngoscopy. This prospective observational study included 502 patients who underwent laryngoscopy and a detailed sonographic assessment. Patients under 18 years old, or with maxillofacial deformities or fractures, limited mouth opening, limited neck movement or history of neck surgery were excluded from the study. Laryngoscopic views of all patients were scored and grouping using the modified Cormack-Lehane (CL) scoring system. The measurements acquired comprised tongue width, the longitudinal cross-sectional area of the tongue, tongue volume, the mandible-hyoid bone distance, the hyoid bone-glottis distance, the mandible-hyoid bone-glottis angle, the skin-thyrohyoid membrane distance, the glottis-superior edge of the thyroid cartilage distance (DGTC), the skin-hyoid bone distance, and the epiglottis midway-skin distance. ANOVA and Chi-square were used to compare differences between groups. Logistic regression was used to identify risk factors for difficult laryngoscopy and it was visualized by receiver operating characteristic curves and nomogram. R version 3.6.3 and SPSS version 26.0 were used for statistical analyses. Difficult laryngoscopy was indicated in 49 patients (CL grade Ⅲ – Ⅳ) and easy laryngoscopy in 453 patients (CL grade Ⅰ – Ⅱ). The ultrasound-measured mandible-hyoid bone-glottis angle and DGTC significantly differed between the 2 groups (p < 0.001). Difficult laryngoscopy was predicted by an area under the curve (AUC) of 0.930 with a threshold mandible-hyoid bone-glottis angle of 125.5° and by an AUC of 0.722 with a threshold DGTC of 1.22 cm. The longitudinal cross-sectional area of the tongue, tongue width, tongue volume, the mandible-hyoid distance, and the hyoid-glottis distance did not significantly differ between the groups. Difficult laryngoscopy may be anticipated in patients in whom the mandible-hyoid bone-glottis angle is smaller than 125.5° or DGTC is larger than 1.22 cm. [ABSTRACT FROM AUTHOR]

Currently the videographic review of emergency intubations is an unstructured, qualitative process. We created a taxonomy of errors that impede the optimal procedural performance of emergency intubation. This was a prospective, observational, study reviewing a convenience sample of deidentified laryngoscopy recordings of emergency department intubations that were qualitatively flagged before the study as demonstrating suboptimal technique. These videos were coded for the presence of 13 predetermined performance errors. Our primary outcome was the incidence of each of these specified errors during emergency intubation. Errors fell into 3 categories: errors of structure recognition during laryngoscope insertion, errors of vallecula manipulation, and errors of device delivery. A total of 100 intubation attempts were reviewed. The most common error was inadequate lifting force with the blade tip in the vallecula which lowered the percent of glottic opening, occurring in 45% of the attempts. The least common performance error was the premature removal of the laryngoscope during bougie placement, occurring in only 9% of the videos. We developed a taxonomy of 13 performance errors of laryngoscopy. Further study is warranted to determine how to best incorporate these into emergency airway training and the airway review process. [ABSTRACT FROM AUTHOR]

Background: Extensive data suggest that exposure to cigarette smoke can induce pulmonary epithelial barrier dysfunction. However, the effects of cigarette smoke on the nasal epithelial barrier are still unclear. Here, we investigated the consequence and mechanism of cigarette smoke on the nasal epithelial barrier. Methods: Sprague Dawley rats were exposed to cigarette smoke for 3 or 6 months, and changes in inflammatory markers and nasal barrier function were evaluated. Moreover, underlying mechanisms were explored. Finally, normal human bronchial epithelial cells were cultured with or without tumor necrosis factor-alpha (TNF-α) in vitro, and the levels of continuity and tight junction–associated proteins were measured. Results: In vivo experiments showed that the nasal mucosal barrier function of rats exposed to cigarette smoke was disturbed. Indeed, proteins associated with tight junctions were decreased, and the levels of inflammatory factors, such as IL-8, IL-6, and TNF-α, were dramatically increased in comparison to those of control animals. In vitro, TNF-α was shown to disrupt the continuity of proteins associated with tight junctions and to downregulate the expression of these proteins in bronchial epithelial cells. Conclusions: We found that cigarette smoke disrupted the nasal mucosal barrier, and the extent of the damage was correlated with the duration of cigarette smoke exposure. We showed that TNF-α can disrupt the continuity and attenuate the expression of tight junction proteins in human bronchial epithelial cells. Therefore, cigarette smoke may induce nasal epithelial barrier dysfunction through TNF-α. [ABSTRACT FROM AUTHOR]

Paediatric critical care units (PCCU) provide care to the most critically ill or injured children. Children are admitted to PCCU with a wide variety of illnesses, injuries and following a range of surgical procedures. High staff-to-patient ratios are required both because of the potentially rapid evolution of critical illness in children, as well as the complexity of the supportive therapies offered. Definitive evidence for specific paediatric therapies is often limited with extrapolation taken from adult experience, but there are increasing international collaborative efforts that have produced consensus treatment guidelines that serve to promote the use of best practice therapies. This article reviews therapies and techniques that define care in the PCCU and in particular outline principles of management of acute respiratory distress syndrome (ARDS), septic shock and traumatic brain injury (TBI). Neonatal and cardiac intensive care medicine topics are outside the scope of this article. [ABSTRACT FROM AUTHOR]

The article discusses airway changes post-maxillary advancement surgery in unilateral cleft lip/palate patients using cone-beam computed tomography, revealing significant volumetric and cephalometric alterations. Topics include the study's methodology and the observed changes in retropalatal, retroglossal, and total airway volumes, as well as cephalometric measurements.

The tenets of airway anatomy and management continue to be reevaluated and challenged as our knowledge increases. This has led to a better understanding of the pediatric airway and its critical differences from adults. This evolving understanding of the pediatric airway size and shape has significant clinical implications to airway management in the operating room, emergency department, and the intensive care unit. The first significant change in clinical practice was the transition to the routine use of cuffed endotracheal tubes (ETTs). This was facilitated by the availability of the Microcuff® with a polyurethane cuff and a redesigned position of the cuff on the shaft of the ETT without the Murphy's eye. Additional attention to the design and the location of the cuff on the ETT may be necessary as well as to markings for depth of intubation on the shaft of the ETT to ensure that the cuff is placed fully below the cricoid ring following endotracheal intubation. Inflation of the cuff with high intracuff pressures within the cricoid ring may compromise perfusion of the tracheal mucosa and result in airway injury. [ABSTRACT FROM AUTHOR]

Objective: To characterize the prevalence and presentation of laryngomalacia and efficacy of supraglottoplasty (SGP) in a cohort of patients with Pierre Robin Sequence (PRS). Design: Retrospective cohort study. Setting: Tertiary-care children's hospital. Patients, Participants: Consecutive patients with PRS born between January 2010 and June 2018. Main Outcome Measures: Chart review included demographics, comorbid airway obstruction including laryngomalacia, timing of surgical interventions, clinical symptoms, sleep study data, and modified barium swallow study data. Results : 126 patients with PRS were included; 54% had an associated syndrome, 64% had an overt cleft palate, and 22% had a submucous cleft palate. 64/126 were noted to have laryngomalacia (51%). Patients with concurrent PRS and laryngomalacia were significantly more likely to have submucous cleft palate (P =.005) and present with aspiration with cough (P =.01) compared to patients with PRS without laryngomalacia. Patients with concurrent laryngomalacia and PRS showed a significant decrease in apnea–hypopnea index (AHI) and obstructive AHI (OAHI) after mandibular distraction, with a median AHI and OAHI improvement of 22.3 (P =.001) and 19.8 (P =.002), respectively. Patients who underwent only SGP did not show significant improvement in these parameters (P =.112 for AHI, P =.064 for OAHI). Conclusions : The prevalence of laryngomalacia in our PRS cohort was 51%. Patients with PRS and laryngomalacia are more likely to present with overt aspiration compared to patients with PRS without laryngomalacia. These data support that laryngomalacia does not appear to be a contraindication to pursuing MDO. [ABSTRACT FROM AUTHOR]

An 8‐year‐old male neutered French Bulldog was referred for continued nasal dyspnea following a staphylectomy revision performed one month prior to presentation. The patient had a prior history of skin allergies and underwent brachycephalic airway surgery performed at one year of age. Computed tomography (CT) revealed an osseous‐encased, cystic mass arising from the right maxillary sinus. Surgical biopsies were performed and a mucocele with sinusitis and glandular hyperplasia was diagnosed. Based on our systematic review of the literature, maxillary sinus mucocele has not been reported in the dog and should be among the differentials for sinus cystic masses. [ABSTRACT FROM AUTHOR]

This study aims to investigate the association between adenoid hypertrophy and facial development. A total of 388 children aged 1–13 years old who had undergone head MRI in Foshan Maternal and Child Health Hospital were collected, including 196 hypertrophic cases and 192 normal cases. The maxillofacial soft tissue indicators were measured and compared. The A/N ratio and adenoid thickness consistently increased with age in the hypertrophic group and the A/N ratio reached a maximum value three years earlier than the normal group. The pharyngeal airway space, vallecula of epiglottis to anterior plane distance of the third/fourth cervical vertebrae, angle of convexity, total angle of convexity, and the nasolabial angle in the hypertrophy group were smaller than those in the control group (p < 0.05). The thickness of adenoids, palate height, palate length, and tongue length in the hypertrophy group exceeded that of the control group (p < 0.05). To conclude, adenoid hypertrophy was associated with craniofacial features such as a convex facial profile, a narrowed nasopharyngeal airway, an elongated and heightened palate, a lengthened tongue or a lower tongue position. These findings emphasize the importance of early intervention for children with adenoid hypertrophy to mitigate potential adverse effects on maxillofacial development. [ABSTRACT FROM AUTHOR]

The maintenance of planar polarity in airway multiciliated cells (MCCs) has been poorly characterized. We recently reported that the direction of ciliary beating in a surgically inverted tracheal segment remained inverted beyond the time required for the turnover of cells, without adjustment to global distal-to-proximal polarity. We hypothesized that the local maintenance of tissue-level polarity occurs via locally reproduced cells. To provide further insight regarding this hypothetical property, we performed allotransplantation of an inverted tracheal segment between wild-type (donor) and tdTomato-expressing (host) rats, with and without scratching the mucosa of the transplants. The origin of cells in the transplants was assessed using tdTomato-specific immunostaining. Ciliary movement and structures were observed by high-speed video and electron microscopy to analyze MCC orientations. Variabilities in the orientations of closely and distantly located MCCs were analyzed to evaluate the local- and broad-scale coordination of polarity, respectively. The epithelium was maintained by donor-derived cells in the non-scratched inverted transplant over 6 months, beyond one cycle of turnover. The inverted orientation of MCCs was also maintained throughout the non-scratched transplant. MCCs regenerated in the scratched transplant were derived from the host and exhibited diverse orientations across the transplant. However, the orientations of adjacent regenerated MCCs were often coordinated, indicating that airway MCCs can locally coordinate their orientations. A steady-state airway may maintain MCC orientation by locally reproducing MCCs via the local coordination of polarity. This local coordination enables the formation and maintenance of tissue-level polarity in small regions after mucosal injury. [ABSTRACT FROM AUTHOR]

Background and Aim: Supraglottic airway devices are increasingly being used for airway management. I-gel is being widely used even for pediatric patients. Although the weight-based selection of the size of the device seems to be the standard technique, this method may not be possible in all patients. The aim of the study was to compare the standard weight-based method with the thenar eminence dimension-based method for I-gel selection. Material and Methods: A prospective randomized study was conducted on 74 pediatric patients of either sex, aged between 6 months and 15 years, belonging to American Society of Anesthesiologists (ASA) physical status I, II, and III and who were posted for various surgical procedures under general anesthesia. The study population was divided into two groups of 37 patients each. I-gel was inserted based on weight in group A patients and based on thenar eminence size in group B patients. Parameters like first attempt success rate, ease of insertion, and complications were compared between the two groups using Student's t-test and Chi-square test. Results: The demographic values between the groups were comparable. The first attempt success rate was 97.4% in group A and 91.7% in group B (P = 0.358). Insertion of I-gel was unsuccessful in two patients in group B. Two patients of group B had blood staining of the device. None of the patients had complications related to insertion. Conclusion: The thenar eminence dimension can be used instead of weight while choosing the size of I-gel in pediatric patients. None of the patients had complications related to device insertion. [ABSTRACT FROM AUTHOR]

Background and Aims: Tracheal intubation can be difficult in certain scenarios where the head-end of the patient is not accessible as in entrapped casualties. A face-to-face technique using a video-laryngoscope can prove to be useful in such scenarios. However, the two positions of tracheal intubation namely, face-to-face and head-end, using video-laryngoscope have never been compared in patients. Material and Methods: Fifty patients of either sex, between 18 and 60 years, ASA class I/II, MPC I/II, scheduled to undergo surgical operations requiring general anesthesia with tracheal intubation were randomly allocated to either Group F (face-to-face intubation) or Group H (head-end intubation). Intubation was performed using Airtraq™ video-laryngoscope in both groups. Time taken for successful intubation, device insertion time, glottic view as per Cormack and Lehane (CL) grade, ease, attempts, the incidence of failed intubation, and hemodynamic parameters were noted. Results: The time taken for successful intubation in Group F was significantly longer than in Group H (38.09 ± 19.45 s vs. 19.32 ± 9.86 s, respectively; P < 0.001). Three cases of failed intubation were noted in Group F compared to none in Group H (P = 0.235). Glottic view, ease, attempts, and hemodynamic parameters were comparable among the groups (P > 0.05). Conclusion: The time taken for successful tracheal intubation was longer in face-to-face technique than in head-end technique in patients with the normal airway. However, both techniques were similar in terms of glottic view, ease of intubation and number of intubation attempts, the incidence of failed intubation, and hemodynamic changes. Therefore, face-to-face tracheal intubation is a good alternative to secure the airway when the head-end is not accessible. [ABSTRACT FROM AUTHOR]

Keywords: airway; elderly patients; tracheal intubation EN airway elderly patients tracheal intubation 1191 1194 4 09/08/23 20231001 NES 231001 Postoperative pulmonary complications occur as a result of changes to the respiratory system following general anaesthesia. However, in situations where the patient characteristics are suitable for the operation being performed, any reduction in complications would be beneficial in improving patient outcomes as well as reducing the costs of healthcare. Postoperative pulmonary complications in older patients undergoing elective surgery with a supraglottic airway device or tracheal intubation. These complications increase mortality; patients who develop a postoperative pulmonary complication have a 90-day mortality of up to 24.4% compared with 1.2% in those patients without pulmonary complications [[1]]. [Extracted from the article]

Objectives: The benefits of breastfeeding are well established, yet complex infants are less frequently supported to feed direct or pumped breastmilk. This article aims to provide an algorithm to support complex infants in meeting breastfeeding goals. Methods: Two cases are presented to illustrate the breastfeeding support pathway. Each involves early identification of motivated caregivers, consultation of allied health, and assessment of swallowing safety with modification of position or route as appropriate. Results: Two infants presented herein successfully continued to receive breastmilk despite airway complexity—1 with oral aversion secondary to prolonged nil per os period in the setting of tracheoesophageal fistula, and 1 with a tracheostomy secondary to subglottic stenosis. Conclusions: It is both possible and imperative to support complex infants in continuing to breastfeed, either directly or via the safest possible route, for the benefits to both members of the dyad. [ABSTRACT FROM AUTHOR]

Background and aims Supraglottic airway devices (SADs) have revolutionized airway management during general anesthesia, and they fill the niche between the face mask and endotracheal tube in terms of both airway anatomy and degree of invasion. The aim of this study was assessment of peri-laryngeal leak after insertion of I- gel using ultrasound (US) pulse Doppler mode. Methods Hundred patients scheduled for elective surgery after I-gel placement were recruited. Airway leak pressure was detected by using closed circuit in anesthesia workstation and increasing the pressure to 20 mm Hg. Parameters were noted include, leak as observed in the monitor, leak as assessed using the US machine, fiberoptic visualization of the SAD and grading and end tidal CO2 (ETCO2). Results In ultrasound we have detected peri-laryngeal tissue displacement in 18 patients (18%) out of which 10 patients have grade 3 or 4 on fiberoptic examination ([Figure 2]). Among these ten patients, eight patients have inadequate ventilation required reinsertion of I-gel. Conclusion Tissue displacement assessment by ultrasound can be used as a noninvasive alternative to predict leak following supraglottic device insertion (I-gel) placement with the added advantage of no interruption of ventilation. [ABSTRACT FROM AUTHOR]

Objective: To provide a critical overview of the effect of various orthodontic and/or dentofacial orthopedic interventions on three-dimensional volumetric changes in the upper airway. Materials and methods: Four databases were searched for clinical studies concerning 3D volumetric assessments based on CBCT before and after orthodontics interventions. The quality of the studies was assessed using the quality assessment tool of the National Heart, Lung and Blood Institute. After the use of inclusion and exclusion criteria, the pre-and post-treatment volumes were used to visualize the effect of various orthodontics interventions. Results: A total of 48 studies were included in this review and none of which were RCTs. The quality of all included studies was assessed as medium. Overall, there is a tendency for an increase in airway volumes after various orthodontic interventions, except for studies concerning extraction therapy with fixed appliances in adults, in which both increases and decreases in airway volumes have been reported. Conclusion: Orthodontic treatment by growth modification and non-extraction therapy with fixed appliances, regardless of the malocclusion, generally showed positive effects on the airway volume. Orthodontic treatment in combination with extractions does not provide an unambiguous insight. A consensus on the methodology of the airway measurement and nomenclature is urgently needed in order to gain insight into the effect of different interventions on three-dimensional airway changes. Clinical relevance: Various orthodontic treatments do not negatively influence the upper airway volume. However, extraction therapy in adults should be chosen with caution, especially in subjects belonging to a group susceptible to airway obstruction. [ABSTRACT FROM AUTHOR]

The EZ-Blocker (EZB) is a "Y-shaped," semirigid endobronchial blocker used for lung isolation and one-lung ventilation during thoracic surgery. Like many medical tools, initial efforts to use this endobronchial blocker may prove challenging for the uninitiated. However, some tips and tricks can be applied fairly rapidly to aid the clinician in properly placing the device, and, furthermore, may help the clinician get the most out of this innovative device. This article focuses on some of the technical aspects of its placement that the authors have developed over time. Additionally, other facets and potential pitfalls are discussed that relate to intraprocedural issues that may sometimes arise when using this device. The following aspects of the EZB as a lung-isolation device are discussed: standard positioning techniques, alternative positioning techniques, use in pediatric patients, approaches to achieving exceptional lung isolation, advanced uses, and limitations and potential issues. Although some information was taken from the authors' rather extensive experience with using this endobronchial blocker, some of the relevant literature are also reviewed, with the goal of being to improve the reader's knowledge of the device and improve the likelihood of its successful placement. The underlying design of the EZB remains unique among commercially available bronchial blockers in improving positional stability. The Y-shaped conformation, however, can lead to challenges when positioning the device in some patients. Therefore, some very practical tips and tricks are provided to assist the clinician in correctly positioning the device and other hints to improve the quality of lung isolation and surgical conditions. [ABSTRACT FROM AUTHOR]

Airway management is a critical component of the management of emergency department (ED) patients. The ED airway literature primarily focuses upon endotracheal intubation; relatively less is known about the ED use of extraglottic devices (EGDs). The goal of this study was to describe the frequency of use, success, and complications for EGDs among ED patients. The National Emergency Airway Registry (NEAR) is a prospective, multi-center, observational registry. It captures data on all ED patients at participating sites requiring airway management. Intubating clinicians entered all data into an online system as soon as practical after each encounter. We conducted a secondary analysis of these data for all ED encounters in which EGD placement occurred. We used descriptive statistics to characterize these encounters. Of 19,071 patients undergoing intubation attempts, 56 (0.3%) underwent EGD placement. Of 25 participating sites, 13 reported no cases undergoing EGD placement; the median number of EGDs placed per site was 2 (interquartile range 1–2.5, range 1–31). Twenty-nine (54%) patients had either hypotension or hypoxia prior to the start of airway management. Clinicians reported anticipation of a difficult airway in 55% and at least one difficult airway characteristic in 93% of these patients. Forty-one encounters entailed placement of a laryngeal mask airway (LMA®) Fastrach™, 33 of whom underwent subsequent successful intubation through the EGD and 7 of whom underwent intubation by alternative methods. An additional 10 encounters utilized a standard LMA® device. Providers placed 34 (61%) EGDs during the first intubation attempt. Seventeen EGD patients (30%) experienced peri-procedure adverse events, including 14 (25%) experiencing hypoxemia. None of these patients expired due to failed airways. EGD use was rare in this multi-center ED registry. EGD occurred predominantly in patients with difficult airway characteristics with favorable airway management outcomes. Clinicians should consider this emergency airway device for patients with a suspected difficult airway. [ABSTRACT FROM AUTHOR]

Tracheobronchial foreign bodies (TFBs) are pediatric airway emergencies frequently seen. We aimed to examine the changes in the clinical characteristics of pediatric TFB patients in a single institution within the past 36 years. We retrospectively reviewed the data of 85 patients aged 0-10 years with TFBs lodged in the trachea or bronchus admitted at the Department of Otolaryngology-Head and Neck Surgery at Tohoku University Hospital between 1986 and 2021. We also compared the characteristics, diagnostic methods, and treatments of the previous 64 cases (1986-2005) with those of the recent 21 cases (2006-2021). The number of TFB patients decreased later in this study (3.2 vs. 1.3 patients per year). The proportion of TFB patients aged > 3 years was significantly higher in the later period (6.3% vs. 23.8%, p = 0.038). Peanut was the most common cause of TFBs in both periods, and the overall incidence of peanut aspiration significantly decreased in the later period (68.8% vs. 38.1%, p = 0.019). No patient had an undetected TFB for more than 1 month after the onset of symptoms in the later period. Foreign body extraction using rigid bronchoscopy was performed in all patients earlier, whereas flexible bronchoscopy was used in 14.3% later. Our study revealed a recent trend in the clinical characteristics of pediatric TFB patients in a single institution in Northeast Japan. The prevention and treatment of pediatric TFBs should be considered following the recent trends. [ABSTRACT FROM AUTHOR]

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Background: Systemic and local profiles have each been associated with asthma, but parsing causal relationships between system-wide and airway-specific processes can be challenging. We sought to investigate systemic and airway processes in asthma and their causal relationships. Methods: Three hundred forty-one participants with persistent asthma and non-asthmatic controls were recruited and underwent peripheral blood mononuclear cell (PBMC) collection and nasal brushing. Transcriptome-wide RNA sequencing of the PBMC and nasal samples and a series of analyses were then performed using a discovery and independent test set approach at each step to ensure rigor. Analytic steps included differential expression analyses, coexpression and probabilistic causal (Bayesian) network constructions, key driver analyses, and causal mediation models. Results: Among the 341 participants, the median age was 13 years (IQR = 10–16), 164 (48%) were female, and 200 (58.7%) had persistent asthma with mean Asthma Control Test (ACT) score 16.6 (SD = 4.2). PBMC genes associated with asthma were enriched in co-expression modules for NK cell-mediated cytotoxicity (fold enrichment = 4.5, FDR = 6.47 × 10−32) and interleukin production (fold enrichment = 2.0, FDR = 1.01 × 10−15). Probabilistic causal network and key driver analyses identified NK cell granule protein (NKG7, fold change = 22.7, FDR = 1.02 × 10−31) and perforin (PRF1, fold change = 14.9, FDR = 1.31 × 10−22) as key drivers predicted to causally regulate PBMC asthma modules. Nasal genes associated with asthma were enriched in the tricarboxylic acid (TCA) cycle module (fold enrichment = 7.5 FDR = 5.09 × 10−107), with network analyses identifying G3BP stress granule assembly factor 1 (G3BP1, fold change = 9.1 FDR = 2.77 × 10−5) and InaD-like protein (INADL, fold change = 5.3 FDR = 2.98 × 10−9) as nasal key drivers. Causal mediation analyses revealed that associations between PBMC key drivers and asthma are causally mediated by nasal key drivers (FDR = 0.0076 to 0.015). Conclusions: Integrated study of the systemic and airway transcriptomes in a well-phenotyped asthma cohort identified causal key drivers of asthma among PBMC and nasal transcripts. Associations between PBMC key drivers and asthma are causally mediated by nasal key drivers. [ABSTRACT FROM AUTHOR]

Objective: The aim of this study was to evaluate the changes in the upper airway following mandibular setback surgery. Methods: The patients underwent mandibular setback surgery and cone‐beam computed tomography scan data obtained at four time points: before surgery, immediately after surgery, short‐ and long‐term follow‐up. Upper airway geometries were segmented and extracted at each time point. Time‐averaged airflow through the upper airway was evaluated at each time point. The measurements of airway volume and minimum cross‐sectional areas were obtained at four time points. Results: The airway volume and cross‐sectional areas of airway significantly decreased immediately after surgery (p = 0.013 for airway volume and 0.016 for cross‐sectional area). At short‐term follow‐up, the decreased airway volume and cross‐sectional areas still showed statistically significant difference to original dimension (p = 0.017 for airway volume and 0.006 for cross‐sectional area). At long‐term follow‐up, although there were no statistical significances (p = 0.859 for airway volume and 0.721 for cross‐sectional area), the airway volume and cross‐sectional areas had increased slightly compared to those at short‐term follow‐up. Conclusions: Although the airflow and dimensional parameters of the upper airway worsened following mandibular setback surgery, there was a tendency to gradually recover during long‐term follow‐up. [ABSTRACT FROM AUTHOR]

Background: Supraglottic airway devices (SGD) are indispensable for airway management. The successful placement of the laryngeal mask airway (LMA) supreme largely depends on the right size selection. Aims and Objectives: The study was undertaken to compare three LMA supreme insertion methods in short elective surgeries under general anesthesia. Materials and Methods: Atotal of 90 American Society of Anesthesiologists I and II patients (either gender, 18–55 years, Mallampati grade I and II) undergoing short surgeries were randomized into three equal groups (n=30 in each). Insertion of LMA was done after an adequate depth of anesthesia for jaw relaxation (Young’s criteria). The efficacy of controlled ventilation through LMA by each method, success rate, ease of insertion, insertion time, additional induction dose (propofol) required during insertion, hemodynamic stability (baseline vitals and 10 min after insertion), and adverse events after LMA removal were evaluated between groups. Results: Better ventilation (tidal volume at 10 cmH2O) was observed in the thyromental group (448±35) than in tongue width (440±46) and weight-based (409±33) groups. Minimum additional propofol requirement during insertion was in thyromental distance group. Thyromental distance group had the most easy LMA insertions (70%) with minimum insertion time (10±4) and minimum additional propofol requirement during insertion (P<0.05) than other groups. Overall hemodynamic stability and incidence of adverse events were comparable. Conclusion: Thyromental distance may be an alternative attractive choice for size determination of LMA supreme in female adults with normal airway anatomy in comparison to tongue width and conventional body weight-based methods. [ABSTRACT FROM AUTHOR]

Though asthma is a common and relatively easy to diagnose disease, attempts at primary or secondary prevention, and cure, have been disappointing. The widespread use of inhaled steroids has dramatically improved asthma control but has offered nothing in terms of altering long-term outcomes or reversing airway remodeling and impairment in lung function. The inability to cure asthma is unsurprising given our limited understanding of the factors that contribute to disease initiation and persistence. New data have focused on the airway epithelium as a potentially key factor orchestrating the different stages of asthma. In this review we summarize for the clinician the current evidence on the central role of the airway epithelium in asthma pathogenesis and the factors that may alter epithelial integrity and functionality. [ABSTRACT FROM AUTHOR]

Background: Training is required to achieve proficiency in airway management. Simulators are of utmost importance not only for the purpose of training novices, but also for evaluating newer airway devices and techniques. Growing evidence supports inadequate anatomic airway reproduction in adult and pediatric manikins. Methods: We conducted an observational study comparing 17 radiological anatomic airway measurements obtained via the computed tomography of three commercially available manikins with the same measurements obtained from a population of newborns/infant (range: 0–3 months) undergoing magnetic resonance imaging for diagnostic purposes. According to the reference (mean and standard deviation (SD) of the pediatric population), each manikin measurement was defined as adequate, partially adequate or inadequate (difference between means: ≤±1, 1.0–1.96 or >1.96 SD, respectively). The primary outcome was the number of measurements with an adequate reproduction of airways. Results: We included 27 pediatric patients (21 ± 19 days, 48% males, 46.6 ± 3.5 cm, 2.7 ± 0.5 Kg and 12.6 ± 2.9 kg/m2). All manikins had n = 11/17 measurements with inadequate airway anatomic reproduction. The three measurements with more adequate reproduction were the height of the soft palate, retropalatal airspace volume and tongue volume (adequate in two manikins, and partially adequate in the remaining one). Conclusions: In three manikins commonly used for training in pediatric airways, static dimensions do not seem anatomically correct in relation to those of pediatric patients. Such inaccuracies may introduce biases in airway device development as well as in training. [ABSTRACT FROM AUTHOR]

Obstructive sleep apnea is a common sleep related breathing disorder. The demand for sleep medicine services has increased exponentially since the recognition of sleep apnea as a disease in the 1960s. The involvement of dentists in the treatment of sleep apnea has increased. It is important that dentists are aware of the problem of sleep disorders and the potential they have to help in their management. [ABSTRACT FROM AUTHOR]

Implant dentistry is considered to be a safe and routine surgical procedure. However, cases of life-threatening hematoma of the floor of the mouth resulting in airway obstruction were previously reported as a complication of implant placement in the anterior mandible. Massive bleeding in this anatomical site may be caused by perforating the lingual cortex and/or damaging the lingual perimandibular vessels. In the long term, dental implants can fail, mainly due to peri-implantitis, and must be removed. Explantation procedure may occasionally become a complex challenge, with a risk for various complications. Case report: This report presents the first case of life-threatening hematoma of the floor of the mouth, as a complication secondary to a failed attempt of dental implant removal at the anterior mandible. The proximity of the implant to the lingual vascular canal might have served as a cause for vascular damage during explantation. Conclusions: Implant removal complications are scarcely described in the literature. Nonetheless, damaging blood vessels during explantation should not be underestimated. Computed tomography (CT) may be of value not only in preoperative implant planning but also before implant removal in jeopardized anatomical zones such as the anterior mandible. Lingual vascular canals should be looked for on computed tomography scans. [ABSTRACT FROM AUTHOR]

Abstract Background The diagnosis of congenital intrathoracic lesions still has limitations. The airway development was influenced by intrathoracic factors. Whether the diagnostic value of the upper airway parameters in congenital intrathoracic lesions has not been confirmed. Objectives We aimed to compare fetal upper airway parameters between normal fetuses and fetuses with intrathoracic lesions, and we tried to verify its diagnostic value in intrathoracic lesions. Methods This was an observational case–control study. In the control group, 77 women were screened at 20–24 weeks’ gestational age, 23 were screened at 24–28 weeks’ gestational age, and 27 were screened at 28–34 weeks’ gestational age. In the case group, 41 cases were enrolled (6 cases of intrathoracic bronchopulmonary sequestration, 22 of congenital pulmonary airway malformations, and 13 of congenital diaphragmatic hernia). Fetal upper airway parameters (tracheal width, the narrowest lumen width, and width of the subglottic cavity and laryngeal vestibule) were measured using ultrasound equipment. The correlations between fetal upper airway parameters and gestational age, and the differences in fetal upper airway parameters between cases and controls, were analyzed. The standardized airway paraments were acquired, and their potential diagnostic value for congenital intrathoracic lesions were analyzed. Results The fetal upper airway parameters of both groups were positively correlated with the gestational age: The control group, tracheal width (R 2 = 0.569, p

Abstract Objective To study the airway changes of edentulous patients with a magnitude of long centric (MLC) ≥ 1.5 mm during occlusal reconstruction at the centric relation position (CRP) and muscular position (MP). Methods The CRP and MP were determined by Gothic arch. The cephalometric analysis was taken at the two occlusal positions. The sagittal distance of each part of the upper airway was measured. The differences between two occlusal positions were compared. The difference values were calculated by subtracting the two. The correlation between the MLC and the difference value was analyzed. Results The sagittal diameters of palatopharynx and glossopharynx airway at MP were statistically larger than those at CRP (P

Introduction:This study aims to evaluate bronchoscopy’s indications and clinical results in patients who underwent bronchoscopy during their stay in the pediatric intensive care unit (PICU).Methods:This study was carried out retrospectively in PICU between April 2019, and October 2021. The diagnoses of the patients, the reasons for bronchoscopy, where and by whom bronchoscopy was performed, complications related to bronchoscopy, and the contribution of bronchoscopy to diagnosis and treatment were determined.Results:Thirty-seven patients underwent bronchoscopy. The median age was 20 (7-126) months. The children comprised 17 females (45.9%). We performed bronchoscopy in 17 (45.9%) patients in the PICU and in 20 (54.1%) patients in the operating room. Pediatric intensive care physicians, 13 (35.1%) performed fifteen (40.5%) of bronchoscopy procedures pediatric pulmonologists and 9 (24.3%) pediatric surgeons. Nine patients underwent rigid bronchoscopy, 28 patients underwent flexible bronchoscopy. The median bronchoscopy time was 10 minutes (7.5-15). Bronchomalacia was found in 5 of the patients and tracheomalacia in 2 of them. Three patients (8.1%) had extraluminal airway compression. Bronchoscopy was performed in six patients due to foreign body aspiration. In 13 patients, peak inspiratory pressure and positive end-expiratory pressure of mechanical ventilation were decreased after the bronchoscopy procedure. During the bronchoscopy procedure, desaturation showed in 19 patients, bleeding in 4 patients, bradycardia in 4 patients, and short-term cardiac arrest in 3 patients. Three patients with cardiac arrest were patients who underwent rigid bronchoscopy. The median PICU length of stay was 52 days. There were no bronchoscopy-related deaths, but 9 patients died due to their primary disease.Conclusion:Bronchoscopy is a method that can be performed in PICU, both at the bedside and the operating room, to identify pathological changes in the airway in critical patients and to remove foreign bodies and life-threatening plugs in the airway. Its use for emergency or diagnostic purposes is increasing in PICUs.

Objective: Bilateral Vocal Fold Paralysis (BVFP) is a rare but significant resource of respiratory distress in neonates and infants. The objective of this study was to evaluate the efficacy and functional outcomes of Endoscopic Percutaneous Suture Lateralization (EPSL) for the treatment of BVFP in neonates and infants. Methods: A case series study of nine patients undergoing EPSL for BVFP between January 2019 and June 2021 was conducted. All patients were candidates for tracheostomy prior to EPSL. Demographic features including gender, age at diagnosis and surgery, main symptoms, airway comorbidities, airway support, and etiology were collected preoperatively. Patients were evaluated for breathing, swallowing and phonation postoperatively. Surgical success was defined as the ability to avoid tracheostomy. Functional Endoscopic Evaluation of Swallowing (FEES) was conducted to identify aspiration. Voice evaluation was based on clinical observation. Results: Nine patients underwent ten EPSL procedures (one in the left vocal fold, and nine in the right vocal fold). Eight patients (8/9) were able to successfully avoid tracheostomy and feed orally without aspiration after the procedure. One patient experienced clinical improvement in respiratory support requirements and underwent laparoscopic nissen and gastrostomy tube placement. At the last follow-up, two patients regained normal voice, two patients had mild dysphonia, and five patients had moderate dysphonia. Five patients showed partial return of the contralateral vocal fold function. Conclusion: EPSL is an effective and safe treatment for neonatal and infantal BVFP, which enables patients free from tracheostomy without significant impact on swallowing function or phonation. Level of evidence: Level 4.

Abstract Background Ultrasound assessment of the airway recently integrates the point-of-care approach to patient evaluation since ultrasound measurements can predict a difficult laryngoscopy and tracheal intubation. Because ultrasonography is performer-dependent, a proper training and assessment tool is needed to increase diagnostic accuracy. An objective, structured assessment ultrasound skill (OSAUS) scale was recently developed to guide training and assess competence. This work aims to study the psychometric properties of OSAUS Scale when used to evaluate competence in ultrasound hyomental distance (HMD) measurement. Methods: Prospective and experimental study. Volunteers were recruited and enrolled in groups with different expertise. Each participant performed three ultrasonographic HMD evaluation. The performance was videorecorded and anonymized. Five assessors blindly rated participants’ performance using OSAUS scale and a Global Rating Scale (GRS). A psychometric study of OSAUS scale as assessment tool for ultrasound HMD competence was done. Results: Fifteen voluntaries participated on the study. Psychometric analysis of OSAUS showed strong internal consistency (Cronbach’s alpha 0.916) and inter-rater reliability (ICC 0.720; p