Lindahl and Okmian developed two equations for predicting the body surface area of infants and children. The authors are from University Hospital in Lund, Sweden.
NOTE: This algorithm is slightly confusing because of its use of expressing body surface area in square decimeters, or (dm)^2. Since a decimeter is 0.1 meters, a square decimeter should be 0.01 of a square meter.
Patient groups:
(1) body weight between 2.5 and 20 kilograms
(2) body weight between 20.01 and 40 kilograms
For a body weight between 2.5 and 20 kilograms:
body surface area in square decimeters =
= (3.6 * (body weight in kilograms)) + 9
body surface area in square meters =
= (0.036 * (body weight in kilograms)) + 0.09
For a body weight between 20.01 and 40 kilograms:
body surface area in square decimeters =
= (2.5 * (body weight in kilograms)) + 33
body surface area in square meters =
= (0.025 * (body weight in kilograms)) + 0.33
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