Prospective, randomized comparison of two supplemental oxygen methods during gastroscopy with propofol mono-sedation in obese patients

Table 2 The lowest pulse oxygen saturation, interventions related to hypoxemia and adverse events

	WNJT group, n = 49	Nasal cannula group, n = 52	P value
Lowest SpO2 during gastroscopy	95.5 ± 4.3	90.0 ± 7.0	0.000
Airway opening maneuvers	7 (14.3)	36 (69.2)	0.000
Facemask ventilation	0 (0)	4 (7.7)	0.118
Body movement	7 (14.3)	5 (9.6)	0.468
Cough	5 (10.2)	4 (7.7)	0.926
Epistaxis (0/1/2/3)	0/2/1/0 (6.1)	0/0/0/0 (0)	0.111
Sore throat	2 (4.1)	1 (1.9)	0.610

Data are presented as the mean ± SD or the number of patients (percent), as needed. SpO₂: Pulse oxygen saturation; WNJT: Wei nasal jet tube.