A comparison of two hyperangulated video laryngoscope blades to direct laryngoscopy in a simulated infant airway: a bicentric, comparative, randomized manikin study

Table 2 Study results by laryngoscope blades in the NA scenario

p-values of Pairwise Differences
Outcomes	MaB	DB	MiB	KV	DB vs. MaB	DB vs. MiB	KV vs. MaB	KV vs. MiB	KV vs. DB
Time ^a Sequences (s)
TTBV	5.5 [5–7]	5 [4–6.5]	7 [5–8]	5 [3.5–6]	0.01	< 0.001	< 0.001	< 0.001	0.02
TTP	10.25 [9–11.5]	10 [9–11.5]	12 [10–14.5]	9.5 [8.5–11]	0.85	< 0.001	0.02	< 0.001	0.002
TTV	14.5 [13–16]	14.5 [13–16]	16 [14–19]	13 [12–15]	0.75	0.001	0.002	< 0.001	< 0.001
No. attempts^b
1st	80/80 (100%)	79/80 (98%)	78/80 (97%)	80/80 (100%)	0.31	0.56	> 0.99	0.15	0.31
2nd	0	1/80 (2%)	2/80 (3%)	0		0.56
Failed	0	0	0	0
Glottic view
C&L 1/2/3^b	67/13/0	78/2/0	57/23/0	79/1/0	0.007	< 0.001	0.001	< 0.001	> 0.99
POGO (%)^a	90 [90–100]	100 [100]	95 [80–100]	100 [100]	< 0.001	< 0.001	< 0.001	< 0.001	0.84
ELM^b	5/80 (6%)	0/80 (0%)	11/80 (14%)	1/80 (1%)	0.02	< 0.001	0.09	0.002	0.32
BURP	0	0	6/11 (54%)	1/1 (100%)
Neck extension	5/5 (100%)	0	7/11 (63%)	0
Degree of ^a difficulty (1–5)	1 [1–2]	1 [1–1]	1 [1–2]	1 [1–2]	0.44	< 0.001	< 0.001	0.9	< 0.001

^aMedians and [IQR] are shown. Pairwise differences among devices were evaluated using the signed-rank test
^bAbsolute numbers (proportion) are shown. Pairwise differences among devices were evaluated using the chi-square test

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