BACKGROUND: Goal-directed haemodynamic therapy (GDHT) aims to optimize haemodynamic variables. However, its effectiveness in reducing postoperative complications in major abdominal surgery, particularly when targeting both arterial pressure and flow variables, remains unclear. This meta-analysis addresses this by evaluating GDHT using uncalibrated pulse contour (uPC) methods. METHODS: We conducted a systematic review and meta-analysis of randomized controlled trials (RCT) in adult patients undergoing major abdominal surgery who received GDHT using uncalibrated pulse contour (uPC) methods for cardiac output monitoring, with predefined targets for both blood flow and blood pressure. The primary outcome was postoperative complications
secondary outcomes included postoperative acute kidney injury (AKI), hospital length of stay (EH), intraoperative fluid administration and mortality. RESULTS: Initial search retrieved 860 reports, with 12 RCTs (1367 patients) meeting the inclusion criteria. Our meta-analysis showed a significant reduction in postoperative complications (RR 0.78, 95% CI 0.68-0.90), AKI (RR 0.7, 95% CI 0.51-0.97), and hospital LOS (SMD -0.30, 95% CI -0.54 to -0.06) with uPC-guided GDHT. No significant differences were observed in intraoperative fluid volume and mortality. CONCLUSIONS: Implementing GDHT in major abdominal surgery with predefined arterial pressure and blood flow targets significantly reduces postoperative morbidity and hospital EH without increasing intraoperative fluid administration.