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

Table 3 Study results by laryngoscope blades in the DA 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	11 [8.5–14]	8 [6.5–9]	13.5 [9–15.5]	6.5 [5–7]	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
TTP	17.5 [15–20]	14 [11–15]	20.5 [16.5–24]	10 [9.5–12]	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
TTV	23 20–26]	19 [16–21]	27 [22–31]	14 [13–16]	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
No. attempts^b
1st	61/80 (76%)	74/80 (92%)	52/80 (65%)	80/80 (100%)	0.004	< 0.001	< 0.001	< 0.001	0.01
2nd	16/80 (20%)	6/80 (8%)	23/80 (29%)	0	0.29	0.26
Failed	3/80 (4%)	0	5/80 (6%)	0
Glottic view
C&L 1/2/3^b	19/60/1	61/19/0	7/70/3	77/3/0	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
POGO (%)^a	40 [30–60]	90 [90–100]	40 [30–60]	100 [90–100]	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
ELM^b	3/80 (4%)	1/80 (1%)	4/80 (5%)	0/80 (0%)	0.31	0.17	0.08	0.04	0.32
BURP	0	0	0	0
Neck extension	3/3 (100%)	1/1 (100%)	4/4 (100%)
Degree of^a difficulty (1–5)	2 [2–3]	1 [1–2]	3 [3–3]	1 [1–1]	< 0.001	< 0.001	< 0.001	< 0.001	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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