This prospective cohort study aims to investigate the relationship between intraoperative mean arterial pressure (MAP) variability and postoperative fatigue syndrome (POFS) in elderly patients (≥18 years) undergoing laparoscopic abdominal surgery. The main research question is: Does the degree of intraoperative MAP fluctuation correlate with postoperative fatigue in elderly patients? Eligible patients scheduled for elective laparoscopic abdominal surgery under general anesthesia will have their intraoperative blood pressure variability recorded (generalized average real variability, G-ARV), and postoperative fatigue and recovery will be assessed on postoperative days 1, 3, and 7 using the Christensen fatigue scale.
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Postoperative Fatigue (Christensen Score)
Timeframe: Postoperative days 1, 3, and 7