Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1016/j.bjane.2013.10.021
Brazilian Journal of Anesthesiology
Scientific Article

Use of positive pressure in preoperative and intraoperative of bariatric surgery and its effect on the time of extubation

Utilização da pressão positiva no pré e no intraoperatório de cirurgia bariátrica e seus efeitos sobre o tempo de extubação

Letícia Baltieri; Laisa Antonela dos Santos; Irineu Rasera-Junior; Maria Imaculada de Lima Montebelo; Eli Maria Pazzianotto-Forti

http://dx.doi.org/10.1016/j.bjane.2013.10.021 Braz J Anesthesiol, vol.65, n2, p.130-135, 2015
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Abstract

BACKGROUND AND OBJECTIVE: To investigate the influence of intraoperative and preoperative positive pressure in the time of extubation in patients undergoing bariatric surgery. METHOD: Randomized clinical trial, in which 40 individuals with a body mass index between 40 and 55 kg/m2, age between 25 and 55 years, nonsmokers, underwent bariatric surgery type Roux-en-Y gastric bypass by laparotomy and with normal preoperative pulmonary function were randomized into the following groups: G-pre (n = 10): individuals who received treatment with noninvasive positive pressure before surgery for 1 h; G-intra (n = 10): individuals who received positive end-expiratory pressure of 10 cm H2O throughout the surgical procedure; and G-control (n = 20): not received any preoperative or intraoperative intervention. Following were recorded: time between induction of anesthesia and extubation, between the end of anesthesia and extubation, duration of mechanical ventilation, and time between extubation and discharge from the post-anesthetic recovery. RESULTS: There was no statistical difference between groups. However, when applied to the Cohen coefficient, the use of positive end-expiratory pressure of 10 cm H2O during surgery showed a large effect on the time between the end of anesthesia and extubation. About this same time, the treatment performed preoperatively showed moderate effect. CONCLUSION: The use of positive end-expiratory pressure of 10 cm H2O in the intraoperative and positive pressure preoperatively, influenced the time of extubation of patients undergoing bariatric surgery.

Keywords

Diseases, Obesity, Bariatric surgery, Ventilation

Resumo

JUSTIFICATIVA E OBJETIVO: investigar a influência do uso da pressão positiva nas vias aéreas intraoperatória e pré-operatória no tempo de extubação de pacientes submetidos à cirurgia bariátrica. MÉTODO: Trata-se de ensaio clínico randomizado, no qual 40 indivíduos com índice de massa corporal entre 40 e 55 kg/m2, idade entre 25 e 55 anos, não tabagistas, submetidos à cirurgia bariátrica do tipo derivação gástrica em Y de Roux por laparotomia e com prova de função pulmonar pré-operatória dentro da normalidade foram randomizados nos seguintes grupos: G-pré (n = 10): indivíduos que receberam tratamento com pressão positiva não invasiva antes da cirurgia, durante uma hora, G-intra (n = 10): indivíduos que receberam Positive End-expiratory Pressure de 10 cm H2O durante todo o procedimento cirúrgico e G-controle (n = 20): não receberam qualquer tipo de intervenção pré ou intraoperatória. foram anotados os seguintes tempos: tempo decorrido entre a indução anestésica e a extubação, entre o término da anestesia e extubação, tempo de ventilação mecânica, e tempo entre a extubação e a alta da Recuperação Pós-Anestésica. RESULTADOS: Não houve diferença estatística entre os grupos, porém quando aplicado ao Coeficiente de Cohen, o uso da Positive End-expiratory Pressure de 10 cm H2O no intraoperatório mostrou um efeito grande sobre o tempo entre o término da anestesia e a extubação. Sobre este mesmo tempo, o tratamento realizado no pré-operatório apresentou efeito moderado. CONCLUSÃO: O uso da Positive End-expiratory Pressure de 10 cm H2O no intraoperatório e da pressão positiva no pré-operatório, pode influenciar o tempo de extubação de pacientes submetidos à cirurgia bariátrica.

Palavras-chave

Doenças, Obesidade, Cirurgia bariátrica, Ventilação mecânica, pressão positiva

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