Table 2.
Comparison of the five devices
| Macintosh n = 79 | AirTraq n = 79 | KingVision n = 79 | Pentax AWS200 n = 79 | VividTrac n = 79 | p value | |
|---|---|---|---|---|---|---|
| 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 usea | 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 |
The data are the mean ± SD or number (%)
BURP backwards, upwards, and rightwards pressure applied to the larynx
aRated by the participants on a scale from 0 to 10
*The number of events was too small to allow a meaningful analysis
$Not compared as SpO2 correlates with intubation time in a mannikin study