Goal: placement of tip between T7 and T9
Parameters:
(1) birth weight in kg
(2) distance from suprasternal notch to pubic symphysis in cm
(3) total body length in cm
(4) sagittal distance between a horizontal line through the shoulders and a horizontal line through the umbilicus
length of the arterial catheter in cm =
= (7 * (birthweight)) + 2
= distance from the suprasternal notch to the pubic symphysis in cm
= (0.333 * (total body length)) + 0.5
= (sagittal distance between shoulder and umbilicus) + 1
If an umbilical stump is present then its length needs to be included in the calculation.
NOTE: The estimate from the birthweight equation does not match the other equations. Performance may be better at low birthweights. Alternatively there was a mistranslation from the Chinese and a different multiplication factor is needed.
