The aim of this study is to investigate the hypothesis that the use of the Hypotension Prediction Index algorithm (HPI) can reduce intraoperative hypotension (IOH) in adult patients undergoing spinal surgery in the prone position under general anesthesia, as well as to explore its effect on in-hospital postoperative morbidity and mortality.
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Time-weighted average (TWA) in hypotension
Timeframe: Up to 15 minutes after the end of operation