1. What is GFR Calculation in Blood Test?

GFR (Glomerular Filtration Rate) calculation from blood test estimates how well your kidneys are filtering waste from your blood. It's a crucial measure of kidney function and helps in diagnosing and monitoring kidney disease.

2. How Does the Calculator Work?

The calculator uses the GFR equation:

Where:

• \( Scr \) — Serum creatinine (mg/dL)
• \( \kappa \) — 0.7 (female) or 0.9 (male)
• \( \alpha \) — -0.241 (female) or -0.302 (male)
• \( age \) — Age in years
• 1.012 — Female multiplier

Explanation: This equation calculates estimated glomerular filtration rate based on serum creatinine levels, adjusted for age and gender differences in muscle mass and creatinine production.

3. Importance of GFR Calculation

Details: GFR calculation is essential for early detection of kidney dysfunction, monitoring kidney disease progression, adjusting medication dosages, and assessing overall kidney health.

4. Using the Calculator

Tips: Enter serum creatinine in mg/dL, age in years, and select gender. Ensure creatinine value is from a recent blood test and age is accurate for precise results.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal GFR value?
A: Normal GFR is typically 90-120 mL/min/1.73m² for young adults, gradually decreasing with age.

Q2: How often should GFR be tested?
A: Frequency depends on individual risk factors, but annual testing is recommended for those with diabetes, hypertension, or family history of kidney disease.

Q3: Can GFR improve if it's low?
A: Depending on the cause, GFR may stabilize or improve with proper treatment of underlying conditions and lifestyle modifications.

Q4: What affects GFR accuracy?
A: Factors include recent meat consumption, exercise, muscle mass, certain medications, and hydration status.

Q5: When is GFR most accurate?
A: GFR calculations are most reliable when using stable serum creatinine levels from fasting blood samples.