Introduction
Monitored anesthesia care is an anesthetic method applied in relatively simple surgeries, especially in ambulatory surgeries that do not require hospitalization. For adequate sedation, anesthesiologists choose various combinations of sedatives and analgesics. Remifentanil, a µ-opioid, is widely used to induce anesthesia, sedation, and analgesia during anesthesia maintenance. Because of its ultra-short half-life, remifentanil does not exhibit a residual opioid effect after discontinuation of administration [The perfusion index (PI) is a device that measures the ratio between pulsatile and non-pulsatile blood flow [