Table 1.

Baseline characteristic of 3 patients receiving HFNC oxygen therapy during colonoscopy.

	Age	Gender	BMI	ASA Classification	Indication for colonoscopy
Patient 1	85	Female	32	II	Melena
Patient 2	30	Male	34	II	Rectal bleeding
Patient 3	71	Female	37	III	Abdominal pain Rectal bleeding

BMI: body mass index.

ASA: American Society of Anesthesiologists physical status classification system.