Comparison of McGrath, Pentax, and Macintosh laryngoscope in normal and cervical immobilized manikin by novices: a randomized crossover trial

Table 1 Intubation parameters in the normal manikin

	McGrath (n = 105)	Pentax (n = 105)	Macintosh (n = 105)	p value
Total success rate	105 (100)	104 (99)	104 (99)	1.000
1st attempt success	104 (99)	105 (100)	101 (96)	0.376
Intubation time	19 [15–26]	19 [14–25]	19 [16–27]	0.497
Incidence of dental click	20 (19)	31 (30)	38 (36)^a	0.022
Difficulty grade	3.0 [2.0–4.0]	3.0 [2.0–3.5]	3.0 [2.0–5.0]	0.013
Glottic grade				< 0.001
I	83 (79)	86 (82)	27 (26)
IIa	7 (7)	1 (1)	17 (16)
IIb	15 (14)	18 (17)	48 (46)
III	0 (0)	0 (0)	10 (9)
IV	0 (0)	0 (0)	3 (3)

Values are number of patients (%) or median [interquartile range]. Intubation success, tracheal intubation performed within three attempts during 120 s; Intubation time, defined as the time from passage of the laryngoscope blade past the manikin teeth to successful ventilation using an Ambu bag; Dental click, when a click sound from the manikin teeth was heard during intubation; Difficulty grade, graded using a 11-point numeric rating scale (0; extremely easy–10; extremely difficult); Glottic grade, graded using the Cormack Lehane grading system
^ap < 0.05/3, vs. McGrath group

ISSN: 2047-783X