Patient selection: child up through 7 years of age
Parameters:
(1) age in years (represented as a decimal)
(2) height in cm
(3) weight in kilograms
tracheal tube diameter in mm =
= (0.1 * (age in years)) + (0.02 * (height in cm)) + (0.016 * (weight in kg)) + 2.44
tracheal tube diameter in mm if age < 1 year =
= (0.6 * (age in years)) + (0.009 * (height in cm)) + (0.05 * (weight in kg)) + 2.45
tracheal tube diameter in mm if age 1 to 7 years =
= (0.15 * (age in years)) + (0.008 * (height in cm)) + (0.018 * (weight in kg)) + 3.25
Other formulae given for age < 1 year:
tracheal tube diameter =
= (age in years) + 3.2
= ((weight in kilograms) / 8.8) + 3
= ((height in cm) / 27) + 1.4
Other formulae given for age 1 - 7 years:
tracheal tube diameter =
= ((weight in kilograms) / 12) + 3.6
= ((height in cm) / 27) + 1.85
