Enter the serum creatinine level and the height of the child into the calculator to estimate the glomerular filtration rate (GFR) using the Schwartz formula.
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Schwartz Formula
The Schwartz formula is used to estimate the glomerular filtration rate (GFR) in children. The formula is as follows:
eGFR = (k * Height) / Serum Creatinine
Where:
- eGFR is the estimated glomerular filtration rate (mL/min/1.73 m²)
- k is a constant (0.413 for children and adolescents)
- Height is the height of the child in centimeters (cm)
- Serum Creatinine is the level of creatinine in the blood (mg/dL)
To calculate the estimated GFR, multiply the constant k by the height of the child and divide by the serum creatinine level.
What is the Schwartz Formula?
The Schwartz formula is a simple and widely used method to estimate the kidney function in children. It is particularly useful because it accounts for the growth of the child, providing a more accurate assessment of kidney function than serum creatinine alone. The formula is named after Dr. Schwartz, who developed it in 1976.
How to Calculate GFR using the Schwartz Formula?
The following steps outline how to calculate the estimated GFR using the Schwartz Formula.
- First, measure the height of the child in centimeters (cm).
- Next, obtain the serum creatinine level from a blood test (mg/dL).
- Use the constant k value of 0.413 for children and adolescents.
- Insert the values into the Schwartz formula: eGFR = (0.413 * Height) / Serum Creatinine.
- Calculate the estimated GFR (eGFR) in mL/min/1.73 m².
- Compare the result with the calculator above to verify your calculation.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Height of the child = 120 cm
Serum Creatinine level = 0.6 mg/dL
