Intraoperative hypotension (IOH) is a common and serious complication during surgery, closely associated with poor postoperative outcomes. Traditionally, anesthesiologists rely on real-time physiological parameters and alarms to monitor blood pressure, but the low alarm thresholds may lead to delayed interventions. The Hypotension Prediction Index (HPI) is a novel predictive tool that uses arterial waveform signals and advanced algorithms to forecast hypotensive events in advance. Recent observational studies have shown that HPI's accuracy in predicting hypotension is highly consistent with setting the physiological monitor's alarm threshold to 73 mmHg. This study will compare the effectiveness of HPI and a raised alarm threshold of 73 mmHg in preventing IOH. While HPI is promising with its AI-assisted approach to patient care, its high cost due to the advanced technology raises concerns. If its accuracy is comparable to simply raising the traditional monitor threshold, it may not lead to substantial changes in clinical practice.
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Comparison of Time-Weighted Average (TWA) for MAP below 65 mmHg During Surgery
Timeframe: From the start of surgery to the end of surgery, approximately up to 12 hours, depending on the duration of the operation.
Comparison of Time-Weighted Average (TWA) for MAP above 100 mmHg During Surgery
Timeframe: From the start of surgery to the end of surgery, approximately up to 12 hours, depending on the duration of the operation.