Low BP During Surgery Associated With Increased Risk Of Post
A study revealed that patients who experience low blood pressure during surgery are at increased risk for postoperative delirium. The study included 316,717 patients who had non-cardiac surgery, 2,183 (0.7%) were diagnosed with delirium within 30 days after surgery. Of those patients, 41.7% had mean arterial pressure (an average of systolic and diastolic blood pressure) below 55 mmHg during surgery for fewer than 15 minutes and 2.6% had it for longer than 15 minutes. The researchers found that patients who experienced low blood pressure were up to 60% more likely to experience postoperative delirium, and the effect was magnified in patients who had longer surgeries. While postoperative delirium can affect anyone, elderly patients are at highest risk.

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https://www.asahq.org/about-asa/newsroom/news-releases/2021/10/treating-low-blood-pressure-during-surgery-may-decrease-risk-of-developing-postoperative-delirium
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