3. Discussion
hypoxemia, airway obstruction, hypercapnia
AIRWAY OBSTRUCTION, RESPIRATORY DEPRESSION
The goal of using an NHF device, during an ERCP under intravenous anesthesia, is to prevent not only acute hypercapnia, but also hypoxemia. The clinical conditions resulting from a transient upper airway obstruction that can occur during intravenous anesthesia could be prevented or ameliorated by the use of an NHF device. It has been reported that the frequently used intravenous anesthesia during an ERCP is associated with the higher occurrence rate of respiratory depression.This is an verifiable study aims to test that there would be a difference in the total dose of pethidine hydrochloride, a concomitant analgesic, if the same SEDLINEThe primary endpoint of this study is; total dose of pethidine hydrochloride, an analgesic used in combination. In addition, occurrence rate of marked hypercapnia showing a maximum percutaneous carbon dioxide concentration of 60 mm Hg or more (corresponding to PaCO