Elderly Clinical Trial
Official title:
Effect of Individualized PEEP Titration on Postoperative Pulmonary Complications in Elderly Patients Undergoing Laparoscopic Surgery- A Multicenter Randomized Controlled Clinical Trial
This study aims to investigate the effectiveness and safety of implementing a personalized positive end-expiratory pressure (PEEP) management strategy guided by esophageal pressure (Pes), as well as its potential to reduce the occurrence of postoperative pulmonary complications (PPCs) in elderly patients undergoing laparoscopic surgery.
This trial is a single-blind, randomized, controlled, multicenter study. Elderly patients undergoing laparoscopic surgery under general anesthesia will be recruited according the inclusion and exclusion criteria. Participants in this study will be randomly assigned into two groups. The total sample size will be 232, with 116 participants in the experimental group and 116 participants in the control group. A stratified block randomization method will be employed, using the ARISCAT score for PPCs risk assessment and individual study centers as stratification factors. Anesthesia routine will be applied during pre-anesthetic preparation, anesthetic induction, maintenance and emergence except intraoperative respiratory management. In the control group (PEEP Group), fixed PEEP of 3 cmH2O is applied throughout the procedure without lung recruitment maneuvers. While in the experimental group (Pes-Guided PEEP Group), continuous monitoring of end-expiratory esophageal pressure (Pes_ee) is conducted. PEEP is chosen to maintain a positive transpulmonary pressure at end-expiration (Ptp_ee = PEEP - Pes_ee) after lung recruitment. PEEP titration following lung recruitment should be performed after endotracheal intubation or any procedure that may cause lung collapse, such as pneumoperitoneum, deflation or inflation of the endotracheal tube cuff, changes in position, or endotracheal suctioning. PEEP Titration is also required every hour after the establishment of pneumoperitoneum. Patients will be followed up within 7 days after surgery to assess basic vital signs, potential postoperative pulmonary complications (PPCs). Additionally, postoperative non-respiratory complications will be evaluated.Laboratory tests, the 15-item Quality of Recovery-15 (QoR-15) questionnaire, complications within 30 days after surgery, and 90-day survival rates will also be recorded. ;
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