New oxygen monitor tested in spinal anesthesia study

This completed study looked at whether a new monitoring tool called Oxygen Reserve Index (ORi) can give earlier warning of low oxygen levels in patients having varicose vein surgery under spinal anesthesia. The study included 56 adults and compared standard oxygen monitoring with ORi monitoring. The goal was to see if ORi could help doctors adjust oxygen therapy more precisely and prevent both too little and too much oxygen.