Table 4: SpO2 level reached according to the

oxygenation device used.

SpO2

(%)

BVM,

n (%)

Bain circuit,

n (%)

NIMV,

n (%)

p

After pre-oxygenation

≤ 60

1 (2.0)

0 (0.0)

1 (6.3)

61-70

2 (4.1)

2 (4.5)

0 (0.0)

71-80

10 (20.4)

8 (18.2)

0 (0.0)

0.473

81-90

15 (30.6)

15 (34.1)

5 (31.3)

91-100

21 (42.9)

19 (43.2)

10 (62.5)

Post induction

≤ 60

13 (26.5)

10 (22.7)

0 (0.0)

61-70

8 (16.4)

4 (9.1)

2 (12.5)

71-80

13 (26.5)

17 (38.7)

4 (25.0)

0.105

81-90

15 (30.6)

13 (29.5)

10 (62.5)

91-100

0 (0.0)

0 (0.0)

0 (0.0)

SpO2 = oxygen saturation by pulseoximetry. B

VM = bag-valve-mask.

NIMV = non-invasive mechanical ventilator.