1. What is the Bedside Schwartz Equation?

The Bedside Schwartz equation estimates glomerular filtration rate (GFR) in children using serum creatinine and height. It is specifically designed for pediatric patients and provides a reliable assessment of kidney function in this population.

2. How Does the Calculator Work?

The calculator uses the Bedside Schwartz equation:

Where:

• \( Height \) — Height in centimeters (cm)
• \( Scr \) — Serum creatinine in milligrams per deciliter (mg/dL)
• 0.413 — Constant coefficient derived from pediatric population studies

Explanation: The equation accounts for the relationship between height (as a surrogate for muscle mass) and creatinine production in children, providing age-appropriate GFR estimation.

3. Importance of Pediatric eGFR Calculation

Details: Accurate GFR estimation in children is essential for diagnosing and monitoring chronic kidney disease, guiding medication dosing, and assessing growth and development impacts of renal impairment.

4. Using the Calculator

Tips: Enter height in centimeters and serum creatinine in mg/dL. Ensure both values are positive and measured accurately for reliable results.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this equation appropriate for?
A: The Bedside Schwartz equation is validated for children and adolescents aged 1-18 years.

Q2: Why is height used instead of age in this equation?
A: Height serves as a better surrogate for muscle mass in growing children, which correlates with creatinine production.

Q3: What are normal eGFR values for children?
A: Normal eGFR varies by age and body size, but generally ranges from 90-140 mL/min/1.73m² in healthy children.

Q4: Are there limitations to this equation?
A: Less accurate in children with extreme body habitus, muscle wasting, or rapidly changing kidney function.

Q5: When should this equation not be used?
A: Not recommended for neonates, infants under 1 year, or children with unusual muscle mass (e.g., athletes, neuromuscular disorders).