GFR Calculator Peds

Peds GFR Equation:

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

Estimated GFR (eGFR):

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1. What is the Peds GFR Equation?

The Peds GFR equation estimates glomerular filtration rate (GFR) in pediatric patients using height and serum creatinine. This simplified formula provides a quick assessment of kidney function in children and adolescents.

2. How Does the Calculator Work?

The calculator uses the Peds GFR equation:

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

Where:

\( Height \) — Patient height in centimeters (cm)
\( Scr \) — Serum creatinine in milligrams per deciliter (mg/dL)
0.413 — Empirical coefficient for pediatric population

Explanation: The equation utilizes the relationship between height, creatinine, and kidney function, specifically calibrated for pediatric patients where muscle mass correlates with height.

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 both values are positive and measured accurately. Use recent measurements for most accurate results.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this equation suitable for?
A: This equation is primarily designed for children and adolescents, typically from 1 to 18 years of age.

Q2: How does this differ from adult GFR equations?
A: Pediatric equations account for the relationship between height and muscle mass development, which differs from adult physiology where age and gender are more significant factors.

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

Q5: When should this calculation be used?
A: Use for routine screening, monitoring known kidney conditions, or when adjusting nephrotoxic medications in pediatric patients.