Intraoperative hypotension affects 30 to 80% of surgical patients.
Intraoperative hypotension is common among patients undergoing non-cardiac surgery and is associated with organ injury and death.
Even brief episodes of Intraoperative hypotension are associated with increased risk of postoperative complications.
Studies suggest that exposure to a mean arterial pressure lower than 60 mmHg to 65 mmHg increases the risk of postoperative myocardial and kidney injury.
Multiple studies associated with intraoperative MAP less than 65 mmHg sustained for 10 minutes or longer is associated with a relative increase in the risk of acute kidney injury by 60%, of myocardial. injury by 30%, and of mortality by 4%.
Current guidelines recommend maintaining main arterial pressure (MAP) at 60 mmHg or higher during surgery.
Among patient at high risk of postoperative complications involving major abdominal surgery, patient preoperative blood pressure management with MAP target based on preoperative mean nighttime MAP did not decrease the composite outcome of acute kidney injury, acute myocardial injury, non-fatal cardiac arrest, or death within the first seven postoperative days compared with routine blood pressure management with an MAP target 65 mmHg or higher. (IMPROVE multi trial group).