Feasibility and Safety of Supraglottic Oxygen Delivery Via an Endotracheal Tube for Non-intubated ERCP Anesthesia: A Two-Stage Phase II Clinical Study

Exclusion Criteria

• •Severe cardiac dysfunction (\<4 METs);
• •Severe renal insufficiency (requiring preoperative dialysis);
• •Diagnosed chronic obstructive pulmonary disease (COPD) or other acute/chronic pulmonary diseases requiring long-term/intermittent oxygen therapy;
• •Increased intracranial pressure;
• •Upper respiratory tract infections (oral/nasal/pharyngeal);
• •Fever (core temperature \>37.5°C);
• •Confirmed pregnancy or current breastfeeding;
• •Allergy to sedatives (e.g., propofol) or medical adhesives;
• •BMI \>30 kg/m²;
• •Current participation in other clinical trials;