1. What is the GFR With Creatinine Range?

The GFR (Glomerular Filtration Rate) with creatinine range estimates kidney function based on serum creatinine levels, adjusted for age, weight, and gender. It provides a practical assessment of kidney function across different creatinine ranges.

2. How Does the Calculator Work?

The calculator uses the GFR equation adjusted for creatinine range:

Where:

• \( Scr \) — Serum creatinine (mg/dL)
• \( age \) — Age in years
• \( weight \) — Weight in kilograms
• 0.85 — Female adjustment factor

Explanation: The equation accounts for the relationship between creatinine production (affected by muscle mass) and kidney filtration capacity.

3. Importance of GFR Calculation

Details: GFR estimation is essential for assessing kidney function, detecting early kidney disease, and monitoring disease progression.

4. Using the Calculator

Tips: Enter serum creatinine in mg/dL, age in years, weight in kg, and select gender. All values must be valid (creatinine > 0, age between 1-120, weight > 0).

5. Frequently Asked Questions (FAQ)

Q1: What creatinine ranges does this work for?
A: This equation works across the full range of creatinine values, but is most accurate for stable, ambulatory patients.

Q2: How does weight affect GFR calculation?
A: Weight is a proxy for muscle mass, which affects creatinine production. Heavier individuals typically produce more creatinine.

Q3: When is this equation not appropriate?
A: Not recommended for amputees, very obese/muscular individuals, or those with rapidly changing kidney function.

Q4: How often should GFR be calculated?
A: For monitoring kidney disease, GFR should be calculated with each new creatinine measurement.

Q5: What are normal GFR values?
A: Normal GFR is typically >90 mL/min/1.73m², though values decrease with normal aging.