HFNC Versus Conventional Oxygen Therapy in Prolonged Upper Gastrointestinal Endoscopy in the ICU

high flow cartridge and adult size nasal cannula: (flow range: 5-40L/minute, oxygen concentration (FiO2): 21-100%, temperature range: 33-39◦ C, humidity minimum of 12mg/liter)

Adult size, single use nasal cannula

Upper gastrointestinal endoscopy (UGE) will be either diagnostic and/or therapeutic including variceal band ligation, endoscopic hemostasis as injection of bleeding peptic ulcers with adrenaline or bleeders control via either argon plasma coagulation (APC) or heater probe coagulation.

Upper gastrointestinal endoscopy (UGE) will be diagnostic