Lung-protective Mechanical Ventilation for Abdominal Laparoscopic Surgeries

This was a double-blind, randomized controlled clinical trial. 62 patients were randomly assigned to receive either lung-protective ventilation (LPV) with a tidal volume (Vt) of 7 ml/kg ideal body weight (IBW), 10 cmH2O positive end-expiratory pressure (PEEP) combined with regular recruitment maneuvers or conventional ventilation (CV) with a Vt of 10 ml/kg IBW, 0 cmH2O in PEEP and no recruitment maneuvers. The primary endpoints were the intraoperative fluctuation of Cdyn and Cstat, the intra- and postoperative changes in pulmonary oxygenation function including OI, A-aO2. The secondary endpoints were the alteration on chest x-ray, modified Clinical Pulmonary Infection Score (mCPIS), and the incidence of PPCs on the first postoperative day