Non-invasive Measurement of the Hypotension Prediction Index for the Reduction of Intraoperative Hypotension

When you have a major operation, your medical team works hard to keep you safe and well. One important aspect is maintaining a healthy blood pressure level throughout the surgery. Sometimes, blood pressure can drop too low, a condition doctors call 'intraoperative hypotension'. While your care team closely monitors you, a sudden drop in blood pressure can sometimes lead to complications such as kidney problems or even heart issues after your operation.

Traditionally, blood pressure monitoring during surgery might involve a small tube in an artery (which is invasive) or taking readings every few minutes, leaving short "blind spots" in between. This study is exploring a new, less invasive approach using a device called ClearSight. This device continuously monitors your blood pressure without needing a needle in your artery. What's even more advanced is that it has a special feature called the Hypotension Prediction Index (HPI). This HPI uses smart computer analysis to actually predict when your blood pressure might drop too low – up to 15 minutes before it happens! This early warning could allow doctors to adjust your treatment sooner.

The main goal of this research is to see if using this new monitoring system and following its guidance can help reduce the number of people who experience low blood pressure during surgery, and in turn, lower the risk of complications like kidney damage or heart injury afterwards. The study will compare this new method to the standard care patients usually receive when they have major operations like hip or knee surgery.