GFR Calculator For Pediatric

Pediatric GFR Equation:

\[ eGFR = 0.413 \times \frac{Height}{Scr} \]

Estimated GFR (eGFR):

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1. What is the Pediatric GFR Equation?

The Pediatric GFR equation estimates glomerular filtration rate (GFR) specifically for children using height and serum creatinine. This simplified formula provides a quick and reliable assessment of kidney function in pediatric populations.

2. How Does the Calculator Work?

The calculator uses the Pediatric GFR equation:

\[ eGFR = 0.413 \times \frac{Height}{Scr} \]

Where:

\( Height \) — Child's height in centimeters (cm)
\( Scr \) — Serum creatinine in milligrams per deciliter (mg/dL)
\( 0.413 \) — Empirical constant derived from pediatric population studies

Explanation: This equation leverages the strong correlation between height and muscle mass in children, providing a more accurate GFR estimation than adult formulas.

3. Importance of Pediatric GFR Calculation

Details: Accurate GFR estimation in children is essential for detecting congenital kidney abnormalities, monitoring chronic kidney disease progression, and adjusting medication dosages for pediatric patients.

4. Using the Calculator

Tips: Enter height in centimeters and serum creatinine in mg/dL. Ensure accurate height measurement and use fasting creatinine values when possible for optimal results.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this equation suitable for?
A: This equation is typically used for children aged 1-18 years. For infants under 1 year, specialized neonatal equations may be more appropriate.

Q2: How does this compare to Schwartz formula?
A: This simplified equation provides comparable accuracy to the Schwartz formula while being easier to calculate manually.

Q3: What are normal eGFR values for children?
A: Normal pediatric eGFR values vary by age and body size, but generally range from 90-140 mL/min/1.73m², with higher values in younger children.

Q4: When should creatinine be measured in children?
A: Morning samples are preferred. Avoid testing after recent illness, dehydration, or high-protein meals which can temporarily affect creatinine levels.

Q5: Are there limitations to this equation?
A: This equation may be less accurate in children with extreme body habitus, muscle wasting conditions, or rapidly changing kidney function.