From: A prospective randomized study of different height of operation table for tracheal intubation with videolaryngoscopy in ramped position
Nipple group
(n = 72)
Umbilical group
P value
Laryngoscopy time (s)
16 ± 4
10 ± 3
< 0.001
Tube insertion time (s)
24 ± 6
18 ± 4
Total intubation time (s)
40 ± 7
28 ± 5