eGFR Calculator Children UK

Children UK eGFR Equation:

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

Estimated GFR (eGFR):

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1. What is the Children UK eGFR Equation?

The Children UK eGFR equation (Bedside Schwartz formula) estimates glomerular filtration rate (GFR) in children using serum creatinine and height. It provides a simple and accurate assessment of kidney function specifically designed for pediatric populations.

2. How Does the Calculator Work?

The calculator uses the Children UK eGFR equation:

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

Where:

\( Height \) — Height in centimeters (cm)
\( Scr \) — Serum creatinine in milligrams per deciliter (mg/dL)
\( 0.413 \) — Constant coefficient for the equation

Explanation: This simplified version of the Schwartz formula uses height as a surrogate for muscle mass and creatinine production, providing reliable GFR estimates in children.

3. Importance of eGFR Calculation in Children

Details: Accurate GFR estimation in children is essential for diagnosing kidney disease, monitoring kidney function growth, and adjusting medication dosages appropriate for pediatric patients.

4. Using the Calculator

Tips: Enter height in centimeters and serum creatinine in mg/dL. Ensure both values are positive numbers. The calculator is specifically validated for pediatric use.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this calculator suitable for?
A: This equation is validated for children from 1 to 18 years old. For infants under 1 year, different equations may be more appropriate.

Q2: Why is height used in pediatric eGFR calculations?
A: Height serves as a better indicator of muscle mass and creatinine production in growing children than weight or body surface area.

Q3: What are normal eGFR values in children?
A: Normal eGFR in children varies by age but is generally higher than adults, often ranging from 90-140 mL/min/1.73m² depending on age and body size.

Q4: Are there limitations to this equation?
A: This equation may be less accurate in children with extreme body habitus, malnutrition, or muscle wasting conditions.

Q5: Can this calculator be used for drug dosing in children?
A: While useful for estimating kidney function, consult pediatric nephrology for precise drug dosing decisions in children with kidney impairment.