GFR Calculator Pediatric Calculator

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) in children using height and serum creatinine. This simplified formula provides a quick 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:

\( Height \) — Height in centimeters (cm)
\( Scr \) — Serum creatinine in mg/dL
0.413 — Conversion constant for pediatric population

Explanation: This equation accounts for the relationship between body size (height) and creatinine clearance in children, providing age-appropriate GFR estimation.

3. Importance of Pediatric GFR Calculation

Details: Accurate GFR estimation in children is essential for detecting kidney dysfunction early, monitoring growth-related changes in kidney function, and guiding appropriate medication dosing in pediatric patients.

4. Using the Calculator

Tips: Enter height in centimeters and serum creatinine in mg/dL. Ensure both values are positive and valid for accurate calculation. This calculator is specifically designed for pediatric use.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this calculator suitable for?
A: This equation is primarily designed for children and adolescents. For adults, other equations like CKD-EPI are more appropriate.

Q2: Why use height instead of weight in pediatric GFR calculation?
A: Height is a more stable growth parameter and better correlates with kidney size and function in growing children.

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

Q4: Are there limitations to this equation?
A: This simplified equation may be less accurate in children with extreme body habitus, malnutrition, or rapidly changing kidney function.

Q5: When should this calculator not be used?
A: Avoid using for neonates, children with muscle wasting diseases, or when precise GFR measurement is required for critical medical decisions.