A Trial Comparing High-flow Nasal Oxygen With Standard Management for Conscious Sedation During Endoscopic Retrograde Cholangiopancreatography in Prone Position

A Randomized Controlled Trial Comparing High-flow Nasal Oxygen With Standard Management for Conscious Sedation During Endoscopic Retrograde Cholangiopancreatography in Prone Position

Traditional conscious sedation for endoscopic retrograde cholangiopancreatography in prone position places patients at risk of desaturation, and high-flow nasal oxygen may reduce the risk. The aim of this study is to evaluate the role of high-flow nasal oxygen during endoscopic retrograde cholangiopancreatography. The investigators will compare the lowest SpO2 of standard nasal oxygen cannula group and that of high-flow humidified oxygen-delivery system group during the procedure.

Inclusion Criteria:

• 1. patients who will undergo endoscopic retrograde cholangiopancreatography under conscious sedation

Exclusion Criteria:

• 1. dementia or cognitive dysfunction
• 2. altered mental status
• 3. intubated patients or tracheostomy
• 4. pregnancy
• 5. recent history of nasal bleeding
• 6. illiteracy or foreigner