Kempley et al reported equations for predicting the endotracheal tube length needed to intubate a neonate. The authors are from Barts and the London School of Medicine and Dentistry in London.
Patient selection: neonate
Parameters:
(1) body weight in kilograms
(2) week of gestation
endotracheal tube length in cm by weight =
= (1.822 * LN(weight)) + 6.632
endotracheal tube length in cm by gestational age =
= (0.188 * (gestation)) + 1.198
A table of expected values is also given.
Corrected Gestational Age in Weeks
Weight in Kilograms
Tube Length at Lips
23-24
0.5 to 0.6
5.5
25-26
0.7 to 0.8
6.0
27-29
0.9 to 1.0
6.5
30-32
1.1 to 1.4
7.0
33-34
1.5 to 1.8
7.5
35-37
1.9 to 2.4
8.0
38-40
2.5 to 3.1
8.5
41-43
3.2 to 4.2
9.0
To read more or access our algorithms and calculators, please log in or register.
