Anesthesia Endoscope Mask is Applied to Sedation Upper Gastrointestinal Endoscopic Diagnosis and Treatment

The anaesthesia provider supplied oxygen via a nasal cannula at an oxygen flow rate of 8 Litres/minute supplied from an oxygen flowmeter as described in the guide

The study team applied the mask with a head strap to ensure a proper seal,simultaneously ensuring the same oxygen flow rate as the control group