Effectiveness of Hypotension Prediction Index (HPI) in Preventing Hypotension in the Post-Anesthesia Care Unit (PACU)

Postoperative hypotension in the post-anesthesia care unit (PACU) is common and linked to adverse outcomes. The Hypotension Prediction Index (HPI) predicts hypotensive events intraoperatively, but its PACU application is unexplored. This study aims to investigate the effectiveness of HPI-guided monitoring in preventing PACU hypotension.

Inclusion Criteria: * Age ≥ 19 years * Undergoing elective surgery under general anesthesia * Presence of intra-arterial catheter at the end of surgery * Expected PACU stay of ≥ 30 minutes * Provided written informed consent Exclusion Criteria: * Immediate postoperative ICU admission * Use of vasopressors during emergence from anesthesia * ASA physical status classification of V * Known contraindications to arterial line placement * Participation in another interventional study within 30 days