PACU-HPI study evaluates the use of a hemodynamic monitor in the post-anesthetic recovery room on patients undergoing colorectal, hepatobiliary, and vascular surgery, to determine the feasibility of recruiting this surgical population.

Postoperative vascular complications, including myocardial infarction (MI), myocardial injury after noncardiac surgery (MINS), stroke, and death occur in up to 18% of surgical patients.1 Hypotension is a frequent occurrence in the postoperative period and can increase the risk of postoperative vascular complications.2 Therefore, accurate prediction of postoperative hypotension can identify patients at risk for postoperative vascular complications who would benefit from early intervention. The investigators propose a feasibility study to determine the accuracy of the hypotension prediction index (HPI) parameter of the HemoSphere monitor and Acumen IQ sensor (Edwards Lifesciences, Irvine, CA) to predict postoperative hypotension in surgical patients.

Inclusion Criteria:

1. Patient ≥45 years old
2. Will undergo open colorectal, hepatobiliary, or vascular surgery;
3. Is expected to have an arterial cannula inserted intraoperatively;
4. Has an anticipated stay in PACU for at least 2 hours;
5. Able to provide written informed consent

Exclusion Criteria:

1. Planned admission to ICU;
2. Refusal to participate;
3. Previously enrolled in the study

Surgical patients with cardiovascular disease risk factors undergoing colorectal, hepatobiliary, or vascular surgery.