# Schwartz formulae

From: Samtani, Mahesh [PRDUS] <MSamtani>
Date: Tue, 31 Mar 2009 16:09:15 -0400

Dear NMusers,
I am having difficulty with the Schwartz formulae for computing GFR in =
kids. Some references state that the formula gives GFR in mL/min while =
others say it is mL/min/1.73 mý. Also the value of k varies between =
references. This is what I plan on using. Are these formulas in the =
right units with the correct constants.

Mahesh

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Schwartz formula:
GFR (mL/min/1.73 mý) = k*Height(cm) / Serum Creatinine (mg/dL)

k = 0.33 in Preterm Infants
k = 0.45 in Term infants to 1 year old
k = 0.55 for children aged 2 to 12 years
k = 0.55 for girls 13 to 21 years, and
k = 0.70 for boys 13 to 21 years

GFR corrected for the child's actual BSA, which can be obtained using =
the DuBois and DuBois formula
GFR corrected = [GFR * 1.73] / BSA

The DuBois and DuBois formula:
BSA (mý) = (Weight^0.425 x Height^0.725) x 0.007184
where the weight is in kilograms and the height is in centimeters.

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Received on Tue Mar 31 2009 - 16:09:15 EDT

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