Table 2 Comparison of the five devices

First-pass success

56 (70.8%)

77 (97.5%)

77 (97.5%)

77 (97.5%)

73 (92.4%)

< 0.001

Number of attempts before success

 1

56 (70.8%)

77 (97.5%)

77 (97.5%)

77 (97.5%)

73 (92.4%)

< 0.001

 2

11 (14.0%)

0 (0%)

2 (2.5%)

2 (2.5%)

1 (1.3%)

 3

11 (14.0%)

1 (1.3%)

0 (0%)

0 (0%)

4 (6.3%)

 4

1 (1.2%)

0 (0%)

0 (0%)

0 (0%)

0 (0%)

Time to intubation, s, mean  ±  SD

92.7  ±  59.8

67.7  ±  30.7

66.4  ±  24.1

62.8  ±  33.9

82.9  ±  42.8

< 0.001

Lowest SpO₂, median [IQR]

86 [81–89]

88 [87–90]

88 [86–89]

89 [87–90]

86 [85–89]

^$

Bougie use

32 (40.5%)

0 (0%)

0 (0%)

0 (0%)

0 (0%)

< 0.001

BURP manoeuvre

18 (22.8%)

0 (0%)

0 (0%)

0 (0%)

1 (1.3%)

*

Percentage glottic opening, mean  ±  SD

57.1  ±  25.9%

85.5  ±  15.2%

91.0  ±  13.3%

89.7  ±  13.5%

79.3  ±  20.9%

< 0.001

Cormack–Lehane grade

 1

23 (30%)

69 (90%)

72 (95%)

71 (91%)

62 (80%)

< 0.001

 2

39 (51%)

8 (10%)

4 (5%)

7 (9%)

15 (19%)

 3

13 (16%)

0 (0%)

0 (0%)

0 (0%)

0 (0%)

 4

2 (3%)

0 (0%)

0 (0%)

0 (0%)

1 (1%)

Ease of device use^a

6.35  ±  2.20

7.09  ±  1.59

7.41  ±  1.59

7.93  ±  1.47

6.20  ±  2.05

< 0.001

Oesophageal intubation

10 (12.66%)

1 (1.27%)

1 (1.28%)

0 (0%)

0 (0%)

*

Selective intubation

6 (7.59%)

2 (2.53%)

3 (3.8%)

5 (6.3%)

5 (6.3%)

*

Blade placed under the epiglottis

8 (10%)

56 (71%)

29 (37%)

79 (100%)

64 (81%)

< 0.001