The aim of this study is to determine the effect of airway management (a set of medical procedures performed to prevent airway blockage and thus ensure an open path between a patient's lungs and the atmosphere) during endoscopic retrograde cholangiopancreatography [(ERCP), a procedure commonly used to treat conditions of the bile ducts and pancreas] and the effect on airway complications (problems), time to biliary cannulation (access into bile duct) and total procedure duration (length of time). Two methods are being compared and studied: 1) general endotracheal anesthesia: an inhalation anesthetic (substance that blocks pain) technique in which anesthetic and respiratory gases pass through a tube placed in the trachea (throat) via the mouth or nose vs 2) deep sedation without endotracheal intubation: local anesthesia together with sedation (drug that produces sleep) and analgesia (drug that treats pain) only.

Inclusion Criteria:

1. Patient undergoing ERCP without preceding endoscopic ultrasound (EUS)

2. At least one of the following risk factors for adverse events during sedation:

   1. STOP-BANG score of 3 or higher
   2. Abdominal ascites on either physical exam or imaging within the last 14 days
   3. BMI greater than or equal to 35
   4. Chronic lung disease
   5. ASA class 4
   6. Mallampati Class 4 airway (only hard palate visible)
   7. Concurrent moderate to heavy alcohol use (≥4 drinks/day for men and ≥3 drinks/day for women)

Exclusion Criteria:

1. EUS preceding the ERCP
2. Emergent indication for ERCP (eg cholangitis with septic shock)
3. Presence of a tracheostomy
4. Unstable airway
5. Gastric outlet obstruction
6. Altered foregut anatomy (eg Roux-en-Y gastric bypass, Billroth II)
7. Inability to give informed consent