13 results on '"Tiago Antônio Tonietto"'
Search Results
2. Nutritional therapy and outcomes in underweight critically ill patients
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Vicente Lobato Costa, Ana Laura Jardim Tavares, Luiza de Azevedo Gross, Mirela Jobim de Azevedo, Luciana Verçoza Viana, Tiago Antônio Tonietto, Marina Verçoza Viana, and Rafael Barberena Moraes
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Male ,0301 basic medicine ,medicine.medical_specialty ,Critical Care ,Critical Illness ,030209 endocrinology & metabolism ,Desnutrição ,Critical Care and Intensive Care Medicine ,03 medical and health sciences ,0302 clinical medicine ,Thinness ,Nutrition support ,Internal medicine ,medicine ,Humans ,Prospective Studies ,Medical nutrition therapy ,Underweight ,Cuidados críticos ,030109 nutrition & dietetics ,Nutrition and Dietetics ,Nutritional Support ,business.industry ,Critically ill ,Malnutrition ,Middle Aged ,Clinical trial ,Critical care ,Treatment Outcome ,Cohort ,Female ,Observational study ,SOFA score ,medicine.symptom ,Terapia nutricional ,business ,Body mass index ,Malnourished - Abstract
Background & aims: Critically ill patients with body mass index (BMI) < 20 kg/m2 have worse outcomes than normal/overweight patients possibly because underweight is a marker of malnutrition. To assess the effects of nutrition therapy in this population during the first week of an ICU stay. Methods: Prospective, 2-centre, observational study. Nutritional evaluations were performed between days 2 and 3 (first) and between days 5 and 7 (second) of ICU admission. In the first evaluation, patients were divided into non-fed (without nutritional support) and early-fed (those already receiving nutritional support) groups. In the second evaluation, patients were divided according to caloric intake (≥or
- Published
- 2020
3. Is red blood cell distribution width a marker of severity in patients discharged from the ICU?
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Márcio Manozzo Boniatti, Gustavo Adolpho Moreira Faulhaber, Thiago Lisboa, Tiago Antônio Tonietto, and Marina Verçoza Viana
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medicine.medical_specialty ,Distribuição de glóbulos vermelhos ,Transferência de pacientes ,Critical Care and Intensive Care Medicine ,Eritrócitos ,law.invention ,Red blood cell distribution width ,law ,Internal medicine ,medicine ,RDW ,Intensive care unit ,In patient ,Mortality ,Epidemiologia ,Letter to the Editor ,Hematócrito ,business.industry ,lcsh:Medical emergencies. Critical care. Intensive care. First aid ,lcsh:RC86-88.9 ,Unidades de terapia intensiva ,Biomarcadores ,Unidade de Tratamento Intensivo ,Mortalidade ,business - Abstract
Submitted by DSpace Unilasalle (dspace@unilasalle.edu.br) on 2021-07-08T20:04:25Z No. of bitstreams: 1 Is red blood cell distribution_JIC.pdf: 506183 bytes, checksum: eabf86792138ee14e969d903f32abee8 (MD5) Made available in DSpace on 2021-07-08T20:04:25Z (GMT). No. of bitstreams: 1 Is red blood cell distribution_JIC.pdf: 506183 bytes, checksum: eabf86792138ee14e969d903f32abee8 (MD5) Previous issue date: 2019
- Published
- 2019
4. Elevated red blood cell distribution width at ICU discharge is associated with readmission to the intensive care unit
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Márcio Manozzo Boniatti, Tiago Antônio Tonietto, Moreno Calcagnotto dos Santos, Carla Silva Lincho, Josi Vidart, Jeruza Lavanholi Neyeloff, Gustavo Adolpho Moreira Faulhaber, Marina Verçoza Viana, Thiago Lisboa, and José Augusto Santos Pellegrini
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Erythrocyte Indices ,Male ,medicine.medical_specialty ,health care facilities, manpower, and services ,Critical Illness ,Clinical Biochemistry ,Discharged alive ,030204 cardiovascular system & hematology ,Patient Readmission ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,law ,medicine ,Humans ,Hospital Mortality ,Prospective Studies ,Mean corpuscular volume ,Aged ,Univariate analysis ,medicine.diagnostic_test ,Critically ill ,Proportional hazards model ,business.industry ,030208 emergency & critical care medicine ,Red blood cell distribution width ,General Medicine ,Middle Aged ,Intensive care unit ,Intensive Care Units ,Emergency medicine ,Female ,Icu discharge ,business - Abstract
Background Red blood cell distribution width (RDW) is a predictor of mortality in critically ill patients. Our objective was to investigate the association between the RDW at ICU discharge and the risk of ICU readmission or unexpected death in the ward. Methods A secondary analysis of prospectively collected data study was conducted including patients discharged alive from the ICU to the ward. The target variable was the RDW collected at ICU discharge. Elevated RDW was defined as an RDW > 16%. Outcomes of interest included readmission to the ICU, unexpected death in the ward and in-hospital death. Variables with a p -value univariate analysis or with biological plausibility for the occurrence of the outcome were included in the Cox proportional hazards model for adjustment. Results We included 813 patients. A total of 138 readmissions to the ICU and 44 unexpected deaths in the ward occurred. Elevated RDW at ICU discharge was independently associated with readmission to the ICU or unexpected death in the ward after multivariable adjustment (HR: 1.901; 95% CI 1.357–2.662). Other variables associated with this outcome included age, tracheostomy and mean corpuscular volume (MCV) at ICU discharge. Similar results were obtained after the exclusion of unexpected deaths in the ward (HR 1.940; CI 1.312–2.871) and for in-hospital deaths (HR 1.716; 95% CI 1.141–2.580). Conclusions Elevated RDW at ICU discharge is independently associated with ICU readmission and in-hospital death.
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- 2018
5. Influência da estratégia ventilatória no desempenho funcional de enxertos pulmonares em um modelo experimental de transplante pulmonar unilateral de doadores após parada cardiocirculatória
- Author
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Lucas Krieger Martins, Tiago Antônio Tonietto, Gabriela Cury Thiesen, Cristiano Feijó Andrade, Ana Carolina Pecanha Antonio, Paulo Francisco Guerreiro Cardoso, and Elaine Aparecida Felix
- Subjects
Pulmonary and Respiratory Medicine ,Gynecology ,medicine.medical_specialty ,Lung ,Cães ,business.industry ,Experimental model ,Respiration ,Organ preservation ,Single Lung Transplantation ,Ventilação pulmonar ,Respiração artificial ,Lung transplantation ,Dogs ,medicine.anatomical_structure ,Anesthesia ,Pulmonary ventilation ,Artificial ,medicine ,Breathing ,Transplante de pulmão ,Respiration, artificial ,business ,Pneumologia ,Preservação de órgãos - Abstract
OBJETIVO: Comparar a influência de duas estratégias ventilatórias - ventilação controlada a volume (VCV) e ventilação controlada a pressão (VCP) - no desempenho funcional de enxertos pulmonares em um modelo canino de transplante pulmonar unilateral esquerdo, utilizando-se doadores cujos pulmões foram captados após três horas de parada cardiocirculatória em temperatura ambiente e sob ventilação mecânica. MÉTODOS: O estudo incluiu 40 cães mestiços randomizados nos grupos VCV e VCP. Dos 20 receptores, 5 não sobreviveram ao transplante, e 5 não sobreviveram ao período de avaliação pós-transplante. Os 10 receptores sobreviventes (5 em cada grupo) foram avaliados durante 360 min após o término do transplante pulmonar. O desempenho funcional dos enxertos foi estudado através da avaliação da mecânica respiratória, trocas gasosas e histologia do enxerto. RESULTADOS: Não houve diferenças significativas entre os grupos quanto às variáveis de mecânica respiratória (pressão de pico inspiratória, pressão de platô, pressão média de vias aéreas, complacência dinâmica e complacência estática) e de trocas gasosas (PaO2, pressão venosa mista de oxigênio, PaCO2, pressão venosa mista de CO2 e diferença arteriovenosa de oxigênio). As alterações histopatológicas foram compatíveis com o padrão de lesão pulmonar aguda não específica e não diferiram entre os grupos. CONCLUSÕES: Este modelo de transplante pulmonar mostrou que o desempenho funcional do enxerto não foi influenciado pela estratégia ventilatória utilizada até seis horas após a reperfusão. OBJECTIVE: To compare the influence of two different ventilation strategies-volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV)-on the functional performance of lung grafts in a canine model of unilateral left lung transplantation using donor lungs harvested after three hours of normothermic cardiocirculatory arrest under mechanical ventilation. METHODS: The study comprised 40 mongrel dogs, randomized into two groups: VCV and PCV. Of the 20 recipients, 5 did not survive the transplant, and 5 died before the end of the post-transplant assessment period. The remaining 10 survivors (5 in each group) were evaluated for 360 min after lung transplantation. The functional performance of the grafts was evaluated regarding respiratory mechanics, gas exchange, and lung graft histology. RESULTS: There were no significant differences between the groups regarding respiratory mechanics (peak inspiratory pressure, plateau pressure, mean airway pressure, dynamic compliance, and static compliance) or gas exchange variables (PaO2, venous oxygen tension, PaCO2, venous carbon dioxide tension, and the arterial-venous oxygen content difference). The histopathological findings were consistent with nonspecific acute lung injury and did not differ between the groups. CONCLUSIONS: This model of lung transplantation showed that the functional performance of lung grafts was not influenced by the ventilation strategy employed during the first six hours after reperfusion.
- Published
- 2010
6. Early feeding and higher protein intake reduce mortality in malnourished critically ill patients
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Luiza de Azevedo Gross, Tiago Antônio Tonietto, Luciana Verçoza Viana, Rafael Barberena Moraes, Ana Laura Jardim Tavares, Marina Verçoza Viana, Mirela Jobim de Azevedo, and Vicente Lobato Costa
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medicine.medical_specialty ,business.industry ,Critically ill ,medicine ,Early feeding ,Critical Care and Intensive Care Medicine ,Intensive care medicine ,Protein intake ,business - Published
- 2017
7. Direct examination and cultures of bronchoalveolar lavage in pneumonia diagnosis: a comparative experimental study
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José Anflor, Nilton Brandão da Silva, Frederico Krieger Martins, Cristiano Koefender, Lucas Krieger Martins, Tiago Antônio Tonietto, José Cláudio Fonseca Moreira, and Paulo Francisco Guerreiro Cardoso
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Pathology ,medicine.medical_specialty ,Colony Count, Microbial ,Ceftazidime ,Critical Care and Intensive Care Medicine ,medicine.disease_cause ,Sensitivity and Specificity ,Microbiology ,Intensive care ,Streptococcus pneumoniae ,Pneumonia, Bacterial ,medicine ,Animals ,Pseudomonas Infections ,Rats, Wistar ,Lung ,Bacteriological Techniques ,medicine.diagnostic_test ,business.industry ,Pneumonia, Pneumococcal ,medicine.disease ,Anti-Bacterial Agents ,Rats ,respiratory tract diseases ,Penicillin ,Pneumonia ,Bronchoalveolar lavage ,Amikacin ,Pseudomonas aeruginosa ,Pneumococcal pneumonia ,business ,Bronchoalveolar Lavage Fluid ,medicine.drug - Abstract
To assess the accuracy of direct examination and quantitative cultures of BAL to diagnose pneumonia with or without antibiotic treatment.Experimental rat models.Pneumonia was induced by intratracheal inoculation of S. pneumoniae (10(9) cfu/ml) or P. aeruginosa (10(8)cfu/ml). Controls (n = 10) received sterile inoculum. Study animals received penicillin (n = 19) or saline (n = 18) (pneumococcal model); amikacin (n = 13), ceftazidime (n = 11), or saline (n = 13) (Pseudomonas model). BAL was assessed 48 h after infection. The animals were killed for histopathological analysis.All study animals developed pneumonia, which was more extensive in the pneumococcal than in the Pseudomonas model. In pneumococcal pneumonia the sensitivity of BAL cultures (10(3) cfu/ml or higher) was 77.8% with saline and 21.0% with penicillin. In the Pseudomonas ceftazidime group all specimens were negative, precluding diagnosis. The sensitivity of cultures with amikacin was 23.1% vs. 30.8% with saline. In the pneumococcal model intracellular organism (ICO) count of 2% or higher had a sensitivity of 100% for detecting pneumonia with saline and 57.9% with penicillin. In the Pseudomonas model the sensitivity of ICO was 69.2% with both amikacin and saline and 36.3% with ceftazidime. The sensitivity of neutrophil count above 50% in pneumococcal pneumonia was 77.8% and 64.7% with saline and penicillin, respectively, and 69.2%, 61.5%, and 81.8% with saline, amikacin, and ceftazidime, respectively, in Pseudomonas pneumonia.BAL-positive intracellular organisms were more accurate than cultures for the diagnosis of recent pneumonia, and were less affected by antibiotic treatment.
- Published
- 2007
8. OR64: Fasting is the Strongest Risk Factor for Hospital Mortality in Critically Ill Underweight Patients
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Mirela Jobim de Azevedo, Ana Laura Jardim Tavares, Tiago Antônio Tonietto, Vicente Lobato Costa, Marina Verçoza Viana, Luciana Verçoza Viana, Rafael Barberena Moraes, and Luiza de Azevedo Gross
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medicine.medical_specialty ,Nutrition and Dietetics ,Critically ill ,business.industry ,Emergency medicine ,medicine ,Hospital mortality ,Underweight ,medicine.symptom ,Risk factor ,Critical Care and Intensive Care Medicine ,business - Published
- 2017
9. Aldosterone secretion in patients with septic shock: a prospective study
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Henrique Saltz, Gilberto Friedman, Tiago Antônio Tonietto, Mauro Antonio Czepielewski, Marina Verçoza Viana, and Rafael Barberena Moraes
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Cortisol secretion ,Adult ,Male ,endocrine system ,medicine.medical_specialty ,Hypothalamo-Hypophyseal System ,Hydrocortisone ,Endocrinology, Diabetes and Metabolism ,Pituitary-Adrenal System ,Adrenocorticotropic hormone ,Kaplan-Meier Estimate ,Biology ,Insuficiência adrenal ,Renin-Angiotensin System ,Aldosterona ,chemistry.chemical_compound ,Zona fasciculata ,Adrenocorticotropic Hormone ,Internal medicine ,Renin ,medicine ,Adrenal insufficiency ,Humans ,hydrocortisone ,Prospective Studies ,Aldosterone ,Aged ,Adrenal gland ,Hidrocortisona ,General Medicine ,Middle Aged ,medicine.disease ,Shock, Septic ,medicine.anatomical_structure ,Endocrinology ,chemistry ,Zona glomerulosa ,Choque séptico ,septic shock ,Cosyntropin ,Female ,Zona Glomerulosa ,Zona Fasciculata ,adrenal insufficiency ,hormones, hormone substitutes, and hormone antagonists ,medicine.drug - Abstract
Objetivo: Avaliar os níveis séricos dos principais fatores que regulam a ativação da zona glomerulosa e a produção de aldosterona em pacientes com choque séptico, assim como sua resposta ao teste de cortrosina em alta dose (250 μg). Sujeitos e métodos: Em 27 portadores de choque séptico, foram aferidos níveis basais de aldosterona, cortisol, ACTH, renina, sódio, potássio e lactato, bem como realizado teste de cortrosina. Resultados: Renina se correlacionou com níveis basais de aldosterona e sua variação após teste de cortrosina. Cortisol basal e sua variação não se correlacionaram com ACTH. Apenas três pacientes apresentaram disfunção concomitante da secreção de aldosterona e cortisol. Conclusões: Ativação das zonas fasciculada e glomerulosa são independentes. Secreção de aldosterona é dependente da integridade do sistema renina-angiotensina-aldosterona, enquanto secreção de cortisol não parece predominantemente dependente do eixo hipotálamo-hipófise-adrenal. Esses resultados sugerem que a ativação da adrenal em pacientes críticos ocorre por múltiplos mecanismos. Objective: To assess serum levels of the main factors that regulate the activation of the zona glomerulosa and aldosterone production in patients with septic shock, as well as their response to a high-dose (250 μg) adrenocorticotropic hormone (ACTH) stimulation test. Subjects and methods: In 27 patients with septic shock, baseline levels of aldosterone, cortisol, ACTH, renin, sodium, potassium, and lactate were measured, followed by a cortrosyn test. Results: Renin correlated with baseline aldosterone and its variation after cortrosyn stimulation. Baseline cortisol and its variation did not correlate with ACTH. Only three patients had concomitant dysfunction of aldosterone and cortisol secretion. Conclusions: Activation of the zona glomerulosa and zona fasciculata are independent. Aldosterone secretion is dependent on the integrity of the renin-angiotensin-aldosterone system, whereas cortisol secretion does not appear to depend predominantly on the hypothalamic-pituitaryadrenal axis. These results suggest that activation of the adrenal gland in critically ill patients occurs by multiple mechanisms.
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- 2012
10. Prophylactic haloperidol: too early to lose hope
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Márcio Manozzo Boniatti, Marina Verçoza Viana, Tiago Antônio Tonietto, and Rafael Barberena Moraes
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Pulmonary and Respiratory Medicine ,Mechanical ventilation ,Coma ,medicine.medical_specialty ,business.industry ,Incidence (epidemiology) ,medicine.medical_treatment ,behavioral disciplines and activities ,nervous system diseases ,Intervention (counseling) ,mental disorders ,medicine ,Haloperidol ,Delirium ,In patient ,Cumulative incidence ,medicine.symptom ,Intensive care medicine ,business ,medicine.drug - Abstract
Delirium is a very prevalent syndrome and an important independent predictor of negative outcome in patients in the intensive-care unit (ICU), but there is no proven pharmacological intervention to prevent or treat this disorder. Therefore, the study by Valerie J Page and colleagues, which provided an assessment of the use of haloperidol in the ICU setting, was needed. However, the results of this trial should not be classed as defi nitive because the study has some limitations. First, haloperidol was used as both a prophylaxis and treatment, and the number of patients with delirium at enrolment was not stated. We would expect that the dose needed to treat a patient with delirium would be higher than the prophylactic dose. Also, the criteria for stopping the drug should be reconsidered, since although patients might be 2 days free of delirium, they still could be at risk of developing delirium. Second, regarding the statistical analysis, the primary outcome was the number of delirium-free and comafree days in the first 14 days after randomisation, but patients who died before day 14 were recorded as having zero days free of delirium and coma, restricting the analysis to survivors, and correcting the incidence of the main outcome (delirium) according to the competing event (death). When analysing time-to-event data and competing outcomes, a technique known as cumulative incidence analysis can be used to assess the actual incidence of delirium. This type of analysis would have provided more accurate results in Page and colleagues’ study, and should be used in future trials that intend to address delirium incidence. Last, the study authors conclude that their results do not support the use of haloperidol in patients needing mechanical ventilation, irrespective of whether patients screen positive for delirium or are in a coma. They believe that haloperidol should be reserved for short-term management of acute agitation; however, we think it is too soon to come to this conclusion.
- Published
- 2013
11. Partial liquid ventilation with perfluorodecalin following unilateral canine lung allotransplantation in non-heart-beating donors
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Lucas Krieger Martins, Tiago Antônio Tonietto, José Carlos Felicetti, Paulo Francisco Guerreiro Cardoso, Cristiano Feijó Andrade, Luis Carlos Anflor, Elaine Aparecida Felix Fortis, Cristiano Koefender, Nilton Brandão da Silva, and José de Jesus Peixoto Camargo
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Liquid Ventilation ,medicine.medical_treatment ,Hemodynamics ,chemistry.chemical_compound ,Dogs ,Blood Substitutes ,medicine ,Animals ,Transplantation, Homologous ,Mechanical ventilation ,Transplantation ,Fluorocarbons ,Lung ,business.industry ,Pulmonary Gas Exchange ,Respiration, Artificial ,Tissue Donors ,Surgery ,Perfluorodecalin ,medicine.anatomical_structure ,chemistry ,Anesthesia ,Case-Control Studies ,Breathing ,Respiratory Mechanics ,Partial liquid ventilation ,Cardiology and Cardiovascular Medicine ,business ,Allotransplantation ,Lung Transplantation - Abstract
The purpose of this study was to evaluate canine lungs obtained from non-heart-beating donors after unilateral lung transplantation subjected to partial liquid ventilation with perfluorodecalin.Twelve donor dogs were killed and kept under mechanical ventilation for 3 hours. Heart-lung blocks were harvested after retrograde pulmonary hypothermic flush with Perfadex. Left lung grafts were randomly transplanted into 12 weight-matched recipient animals. Animals were divided into 2 groups: control (standard mechanical ventilation, n = 6) and PLV (partial liquid ventilation, n = 6). Forty-five minutes after transplantation, the animals in the PLV group received perfluorodecalin (15 ml/kg) via orotracheal tube. All animals received volume-controlled ventilation (FIO2) 1.0, PEEP 5 cm H(2)O) over 6 consecutive hours. Thereafter, blood-gas analysis, ventilatory mechanics and hemodynamics were registered at 30-minute intervals. After 6 hours of reperfusion the animals were killed and the transplanted lungs were extracted to obtain the wet/dry weight ratio.There were significant differences in pulmonary arterial pressure, which were higher in control group animals (p0.009). The control animals also showed higher arterial PaO(2) than those in the PLV group (p0.00001), but lower PaCO(2) (p0.008). The peak and plateau pressures were higher in the PLV group (p0.00001). Neither static compliance nor wet/dry weight ratios were different in between groups.PLV with perfluorodecalin yields functional results compatible with life in this model. Nonetheless, pulmonary gas exchange and mechanics were superior after reperfusion in animals given conventional mechanical ventilation up to 6 hours after left lung allotransplantation.
- Published
- 2002
12. Is red blood cell distribution width a marker of severity in patients discharged from the ICU?
- Author
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Tiago Antonio Tonietto, Marcio Manozzo Boniatti, Thiago Costa Lisboa, Marina Verçoza Viana, and Gustavo Adolpho Moreira Faulhaber
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Red blood cell distribution width ,RDW ,Intensive care unit ,Mortality ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Abstract We have read the study about the association between high red blood cell distribution width and higher ward mortality after intensive care unit discharge. The study increases the evidence that RDW may be a marker of severity for patients discharged from the ICU. However, in this letter, we comment on issues that need further discussion.
- Published
- 2019
- Full Text
- View/download PDF
13. Influência da estratégia ventilatória no desempenho funcional de enxertos pulmonares em um modelo experimental de transplante pulmonar unilateral de doadores após parada cardiocirculatória Ventilation strategy and its influence on the functional performance of lung grafts in an experimental model of single lung transplantation using non-heart-beating donors
- Author
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Elaine Aparecida Felix, Cristiano Feijó Andrade, Paulo Francisco Guerreiro Cardoso, Gabriela Cury Thiesen, Ana Carolina Peçanha Antonio, Lucas Krieger Martins, and Tiago Antonio Tonietto
- Subjects
Ventilação pulmonar ,Respiração artificial ,Transplante de pulmão ,Cães ,Preservação de órgãos ,Pulmonary ventilation ,Respiration, artificial ,Lung transplantation ,Dogs ,Organ preservation ,Diseases of the respiratory system ,RC705-779 - Abstract
OBJETIVO: Comparar a influência de duas estratégias ventilatórias - ventilação controlada a volume (VCV) e ventilação controlada a pressão (VCP) - no desempenho funcional de enxertos pulmonares em um modelo canino de transplante pulmonar unilateral esquerdo, utilizando-se doadores cujos pulmões foram captados após três horas de parada cardiocirculatória em temperatura ambiente e sob ventilação mecânica. MÉTODOS: O estudo incluiu 40 cães mestiços randomizados nos grupos VCV e VCP. Dos 20 receptores, 5 não sobreviveram ao transplante, e 5 não sobreviveram ao período de avaliação pós-transplante. Os 10 receptores sobreviventes (5 em cada grupo) foram avaliados durante 360 min após o término do transplante pulmonar. O desempenho funcional dos enxertos foi estudado através da avaliação da mecânica respiratória, trocas gasosas e histologia do enxerto. RESULTADOS: Não houve diferenças significativas entre os grupos quanto às variáveis de mecânica respiratória (pressão de pico inspiratória, pressão de platô, pressão média de vias aéreas, complacência dinâmica e complacência estática) e de trocas gasosas (PaO2, pressão venosa mista de oxigênio, PaCO2, pressão venosa mista de CO2 e diferença arteriovenosa de oxigênio). As alterações histopatológicas foram compatíveis com o padrão de lesão pulmonar aguda não específica e não diferiram entre os grupos. CONCLUSÕES: Este modelo de transplante pulmonar mostrou que o desempenho funcional do enxerto não foi influenciado pela estratégia ventilatória utilizada até seis horas após a reperfusão.OBJECTIVE: To compare the influence of two different ventilation strategies-volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV)-on the functional performance of lung grafts in a canine model of unilateral left lung transplantation using donor lungs harvested after three hours of normothermic cardiocirculatory arrest under mechanical ventilation. METHODS: The study comprised 40 mongrel dogs, randomized into two groups: VCV and PCV. Of the 20 recipients, 5 did not survive the transplant, and 5 died before the end of the post-transplant assessment period. The remaining 10 survivors (5 in each group) were evaluated for 360 min after lung transplantation. The functional performance of the grafts was evaluated regarding respiratory mechanics, gas exchange, and lung graft histology. RESULTS: There were no significant differences between the groups regarding respiratory mechanics (peak inspiratory pressure, plateau pressure, mean airway pressure, dynamic compliance, and static compliance) or gas exchange variables (PaO2, venous oxygen tension, PaCO2, venous carbon dioxide tension, and the arterial-venous oxygen content difference). The histopathological findings were consistent with nonspecific acute lung injury and did not differ between the groups. CONCLUSIONS: This model of lung transplantation showed that the functional performance of lung grafts was not influenced by the ventilation strategy employed during the first six hours after reperfusion.
- Published
- 2010
- Full Text
- View/download PDF
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