Continuous Finger-cuff Arterial Pressure Monitoring and Intraoperative Hypotension During Non-cardiac Surgery: the Randomized DETECT II Trial

This is a randomized trial (1) investigating whether continuous finger-cuff - compared to intermittent oscillometric - arterial pressure monitoring reduces the amount of intraoperative hypotension (specifically, from the start of induction of general anesthesia until the end of surgery) in low-to-moderate risk patients having elective non-cardiac surgery.

We will include three types of patients: 1. Patients scheduled for ambulatory (outpatient) elective non-cardiac surgery expected to last ≥30 minutes 2. Low-risk patients (ASA I+II) having inpatient elective non-cardiac surgery expected to last ≥60 minutes 3. Moderate-risk patients (ASA III) having inpatient elective non-cardiac surgery expected to last ≥60 minutes We will only include patients who are 18 years or older; who will have general anesthesia; and in whom intermittent arterial pressure monitoring with upper-arm cuff oscillometry is planned. Patients that meet one or more of the following exclusion criteria cannot participate in the trial: * Emergency surgery * Patients on renal replacement therapy * Contraindications for finger-cuff monitoring (e.g., Raynaud disease)