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Comparison of volume-controlled and pressure-controlled ventilation on respiratory mechanics in laparoscopic bariatric surgery: randomized clinical trial
It is not clear which mechanical ventilation mode should be used in bariatric surgery, one of the treatment options for patients with obesity. To compare volume-controlled ventilation and pressure-controlled ventilation in terms of respiratory mechanics and arterial blood gas values in patients unde...
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Published in: | Brazilian journal of anesthesiology (Elsevier) 2019-11, Vol.69 (6), p.546-552 |
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Main Authors: | , , |
Format: | Article |
Language: | eng ; por |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | It is not clear which mechanical ventilation mode should be used in bariatric surgery, one of the treatment options for patients with obesity.
To compare volume-controlled ventilation and pressure-controlled ventilation in terms of respiratory mechanics and arterial blood gas values in patients undergoing laparoscopic bariatric surgery.
Sixty-two patients with morbid obesity scheduled for gastric bypass were included in this study. Their ideal body weights were calculated during preoperative visits, and patients were divided into two groups, volume-controlled ventilation and pressure-controlled ventilation. The patients were ventilated in accordance with a previously determined algorithm. Mechanical ventilation parameters and arterial blood gas analysis were recorded 5minutes after induction, 30minutes after pneumoperitoneum, and at the end of surgery. Also, the dynamic compliance, inspired O2 pressure/fractional O2 ratio, and alveolar-arterial oxygen gradient pressure were calculated.
Peak airway pressures were lower in patients ventilated in pressure-controlled ventilation mode at the end of surgery (p = 0.011). Otherwise, there was no difference between groups in terms of intraoperative respiratory parameters and arterial blood gas analyses.
Pressure-controlled ventilation mode is not superior to volume-controlled ventilation mode in patients with laparoscopic bariatric surgery.
O modo de ventilação mecânica que deve ser usado em cirurgia bariátrica, uma das opções de tratamento para pacientes com obesidade, ainda não foi definido.
Comparar as ventilações controladas por volume e por pressão em termos de mecânica respiratória e dos valores da gasometria arterial em pacientes submetidos à cirurgia bariátrica laparoscópica.
Foram inclu¡dos neste estudo 62 pacientes com obesidade mórbida programados para bypass gástrico. Seus pesos corporais ideais foram calculados durante as consultas pré-operatórias e os pacientes foram divididos em dois grupos: ventilação controlada por volume e ventilação controlada por pressão. Os pacientes foram ventilados de acordo com um algoritmo previamente determinado. Os parâmetros da ventilação mecânica e as análises da gasometria arterial foram registrados 5 minutos após a indução, 30 minutos após o pneumoperitônio e ao final da cirurgia. Além disso, a complacência dinâmica, a pressão e a fração de oxigênio inspirado e a pressão do gradiente alvéolo-arterial de oxigênio foram calculados.
As pressões de pico das vias aéreas fo |
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ISSN: | 0104-0014 1806-907X 0104-0014 1806-907X |
DOI: | 10.1016/j.bjane.2019.08.004 |