Research Article
Comparing McGRATH® MAC, C-MAC®, and Macintosh Laryngoscopes Operated by Medical Students: A Randomized, Crossover, Manikin Study
Table 2
Intubation time, intubation success rate, Cormack-Lehane grade, and subjective difficulty in the simulated difficult airway (tongue edema).
| | | Macintosh () | McGRATH® MAC () | C-MAC® () | value |
| | Intubation time (s) | | | | | | First attempt (s) | 28.9 (23.8–31.1) | 30.9 (26.3–35.4) | 32.7 (28.2–37.2) | 0.311 | | Second attempt (s) | 31.7 (26.1–37.3) | 27.6 (23.1–32.2) | 30.5 (26.0–34.9) | 0.367 | | Third attempt (s) | 30.8 (26.1–35.6) | 28.9 (24.8–33.2) | 28.2 (23.8–32.5) | 0.402 | | Overall attempts (s) | 34.3 (29.3–39.3) | 31.7 (27.1–36.3) | 32.8 (28.1–37.5) | 0.354 | | Success rate of intubation | | | | | | First attempt | 25 (64) | 35 (90) | 36 (92) | <0.001 | | Second attempt | 22 (56) | 35 (90) | 35 (90) | <0.001 | | Third attempt | 24 (62) | 37 (95) | 36 (92) | <0.001 | | Overall attempts | 27 (69) | 38 (97) | 37 (95) | <0.001 | | Number of intubation attempts, 1/2/3 | 25/2/0 | 35/1/2 | 35/1/1 | 0.663 | | Cormack-Lehane grade, 1/2/3/4 | | | | | | First attempt | 2/17/5/15 | 9/29/1/0 | 7/30/0/2 | <0.001 | | Second attempt | 2/20/4/13 | 9/28/1/1 | 6/30/2/1 | <0.001 | | Third attempt | 2/20/4/13 | 11/28/0/0 | 9/28/0/2 | <0.001 | | Subjective difficulty, VAS (0–10) | 7.8 (7.2–8.4) | 4.5 (3.9–5.1) | 4.8 (4.2–5.4) | <0.001 |
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Data are presented as the median (interquartile range) or number (percentage). value <0.001 compared to the Macintosh blade.
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