Avaliação da função pulmonar em pacientes submetidos à cirurgia cardíaca com circulação extracorpórea

Ricardo Antonio Guimarães Barbosa; Maria José Carvalho Carmona

doi:10.1590/S0034-70942002000600005

Scientific Article

Avaliação da função pulmonar em pacientes submetidos à cirurgia cardíaca com circulação extracorpórea

Evaluation of pulmonary function in patients undergoing cardiac surgery with cardiopulmonary bypass

Ricardo Antonio Guimarães Barbosa; Maria José Carvalho Carmona

http://dx.doi.org/10.1590/S0034-70942002000600005 Braz J Anesthesiol, vol.52, n6, p.689-699, 2002

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JUSTIFICATIVA E OBJETIVOS: As complicações pulmonares permanecem como um grande problema no pós-operatório de cirurgia cardíaca com circulação extracorpórea (CEC). O objetivo do presente estudo foi avaliar as alterações da função pulmonar ocorridas em pacientes submetidos à cirurgia cardíaca de revascularização miocárdica, comparando-os àqueles submetidos à cirurgia cardíaca de troca valvar. MÉTODO: Quinze pacientes submetidos à revascularização (Grupo RM) e 15 pacientes submetidos à troca valvar (Grupo TV) foram avaliados através da relação entre a pressão arterial de oxigênio e sua fração inspirada (PaO2/FiO2), do gradiente alvéolo-arterial de oxigênio (GA-aO2), do shunt pulmonar, da PEEP de melhor complacência e da complacência estática, avaliados no pré-operatório, após a indução da anestesia, 1, 3 e 6 horas de pós-operatório e no 1º e 2º dias de pós-operatório. Os dados foram analisados através da análise de variância para medidas repetidas (p < 0,05). RESULTADOS: Os resultados mostraram valores de gradiente alvéolo-arterial de oxigênio e shunt pulmonar significativamente maiores para o grupo RM em relação ao grupo TV. A relação PaO2/FiO2 foi significativamente maior no grupo TV. Os grupos não diferiram quanto à complacência estática. No grupo RM, a PEEP de melhor complacência obtida no pós-operatório foi significativamente maior que no grupo TV. CONCLUSÕES: No presente estudo observamos que os pacientes submetidos à cirurgia cardíaca de revascularização miocárdica apresentam alterações da função pulmonar diferentes daqueles submetidos à cirurgia cardíaca de troca valvar

Palavras-chave

CIRURGIA, CIRURGIA

Abstract

BACKGROUND AND OBJECTIVES: Pulmonary complications are still a major postoperative problem for cardiac surgeries with cardiopulmonary bypass (CPB). This study aimed at evaluating pulmonary function changes in patients undergoing myocardial revascularization, as compared to those submitted to valve replacement. METHODS: Participated in this study patients undergoing myocardial revascularization (MR Group, n=15) and valve replacement (VR Group, n=15) who were evaluated by the ratio between oxygen blood pressure and its inspired fraction (PaO2/FiO2), oxygen alveolar-arterial gradient (GA-aO2), pulmonary shunt, best compliance PEEP and static PEEP, evaluated in the preoperative period, after anesthetic induction, 1, 3 and 6 postoperative hours and 1st and 2nd postoperative days. Data were analyzed by analysis of variance for repeated measures (p < 0.05). RESULTS: Alveolar-arterial gradient and pulmonary shunt results were significantly higher for the MR group as compared to the VR group. PaO2/FiO2 ratio was significantly higher in the VR group. There were no differences between groups in static compliance. Postoperative best compliance PEEP was significantly higher in the MR group as compared to the VR group. CONCLUSIONS: Our study has shown that patients submitted to myocardial revascularization presented pulmonary function changes different from those submitted to valve replacement.

Keywords

SURGERY, SURGERY

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Avaliação da função pulmonar em pacientes submetidos à cirurgia cardíaca com circulação extracorpórea

Evaluation of pulmonary function in patients undergoing cardiac surgery with cardiopulmonary bypass

Ricardo Antonio Guimarães Barbosa; Maria José Carvalho Carmona

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