Appropriate endotracheal tube sizes and approximate depths.



    


    Endotracheal tube sizing:


Group
ETT size (mm)
Children
(4 + age)/4
Adult women
7.0–8.0
Pregnant women
6.5–7.5
Adult men
8.0–9.0

Appropriate endotracheal tube depths:
Group
ETT depth
(cm from alveolar ridge)
Children
(12 + age)/2
Adult women
20–22
Pregnant women
20–22
Adult men
22–24


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