Echocardiographic evaluation during weaning from mechanical ventilation
Clinics
; 66(1): 107-111, 2011. tab
Artigo
em Inglês
| LILACS
| ID: lil-578605
Biblioteca responsável:
BR1.1
ABSTRACT
INTRODUCTION:
Echocardiographic, electrocardiographic and other cardiorespiratory variables can change during weaning from mechanical ventilation.OBJECTIVES:
To analyze changes in cardiac function, using Doppler echocardiogram, in critical patients during weaning from mechanical ventilation, using two different weaningmethods:
pressure support ventilation and T-tube; and comparing patient subgroups success vs. failure in weaning.METHODS:
Randomized crossover clinical trial including patients under mechanical ventilation for more than 48 h and considered ready for weaning. Cardiorespiratory variables, oxygenation, electrocardiogram and Doppler echocardiogram findings were analyzed at baseline and after 30 min in pressure support ventilation and T-tube. Pressure support ventilation vs. T-tube and weaning success vs. failure were compared using ANOVA and Student's t-test. The level of significance was p<0.05.RESULTS:
Twenty-four adult patients were evaluated. Seven patients failed at the first weaning attempt. No echocardiographic or electrocardiographic differences were observed between pressure support ventilation and T-tube. Weaning failure patients presented increases in left atrium, intraventricular septum thickness, posterior wall thickness and diameter of left ventricle and shorter isovolumetric relaxation time. Successfully weaned patients had higher levels of oxygenation.CONCLUSION:
No differences were observed between Doppler echocardiographic variables and electrocardiographic and other cardiorespiratory variables during pressure support ventilation and T-tube. However cardiac structures were smaller, isovolumetric relaxation time was larger, and oxygenation level was greater in successfully weaned patients.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Respiração Artificial
/
Ecocardiografia Doppler
/
Desmame do Respirador
/
Coração
Tipo de estudo:
Ensaio clínico controlado
Limite:
Adulto
/
Idoso
/
Idoso, 80 anos ou mais
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Clinics
Assunto da revista:
Medicina
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Hospital de Caridade Dr. Astrogildo de Azevedo/BR
/
Hospital de Clínicas de Porto Alegre/BR