High Flow Nasal Cannula Compared to Standard Oxygen for Endoscopic Ultrasound

The purpose of the study is to evaluate the use of high flow nasal cannula versus standard oxygen therapy for high-risk patients undergoing endoscopy procedures.

Inclusion Criteria: • All patients age 18 years and older who present to Gonda 2 procedural area for Endoscopic ultrasound (EUS) with or without endoscopy (EGD)/biopsy/tissue sampling. with BMI ≥ 35 kg/m2 (BMI within the past 6 months in electronic medical records or at current procedure) who are able to consent will be approached for potential enrollment. Exclusion Criteria: * Need for general anesthesia for the procedure instead of the standard monitored anesthesia care. * Patients undergoing combined procedure: Therapeutic EUS/combined procedures including EUS/ERCP, EUS/colonoscopy * Patients on home oxygen therapy, or the diagnosis of "severe COPD" * Patients with existing tracheostomy * Inpatients undergoing EUS * Inability to consent * Cognitive impairment * Blocked nasal passages * Trauma/previous surgery to the nasopharynx * Irregularities of the nose, face, or airway such that HFNC cannot be properly fitted