The goal of this prospective observational study is to externally validate the prediction algorithm using non-invasive monitoring device for intraoperative hypotension. The main question it aims to answer is: Does the prediction algorithm predict intraoperative hypotension effectively?
Adults patients aged 19 or more
Elective surgery under general anesthesia
American Society of Anesthesiologists physical status I - III
Vasopressor/Inotrope usage before surgery
Patients who needs invasive arterial cannulation
Emergency surgery
Pregnant or lactating women