Glomerular Filtration Rate Calculator CKD EPI

CKD-EPI Equation:

\[ eGFR = 142 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.200} \times 0.9938^{age} \times (1.012 \text{ if female}) \]

Estimated GFR (eGFR):

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1. What Is The Glomerular Filtration Rate Calculator CKD EPI?

The Glomerular Filtration Rate Calculator using CKD-EPI equation estimates kidney function from serum creatinine, age, and gender. This calculator provides accurate assessment of glomerular filtration rate for clinical evaluation of kidney health.

2. How Does The Calculator Work?

The calculator uses the CKD-EPI equation:

\[ eGFR = 142 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.200} \times 0.9938^{age} \times (1.012 \text{ if female}) \]

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 provides a more precise estimation of glomerular filtration rate by accounting for the non-linear relationship between serum creatinine levels and actual kidney function.

3. Importance Of eGFR Calculation

Details: Accurate glomerular filtration rate estimation is essential for diagnosing kidney disease stages, monitoring kidney function over time, and making informed clinical decisions regarding patient care and treatment.

4. Using The Calculator

Tips: Enter serum creatinine in mg/dL, age in years, and select gender. Ensure all values are valid with creatinine greater than 0 and age between 1-120 years for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: What Is The Difference Between This Calculator And Other GFR Calculators?
A: This calculator uses the specific CKD-EPI equation coefficients (142, -1.200, 0.9938) which may provide different results compared to other versions of the CKD-EPI equation.

Q2: What Are The Normal GFR Ranges?
A: Normal GFR is typically above 90 mL/min/1.73m². Values between 60-89 may indicate mild kidney impairment, while values below 60 for three months or more suggest chronic kidney disease.

Q3: How Often Should GFR Be Calculated?
A: Frequency depends on individual risk factors and existing conditions. Patients with known kidney disease may need quarterly monitoring, while others may require annual screening.

Q4: Are There Limitations To This Calculation Method?
A: This equation may be less accurate in elderly patients, those with extreme body mass indices, amputees, pregnant women, or individuals with rapidly changing kidney function.

Q5: Can This Calculator Be Used For Medication Dosing?
A: While useful for general assessment, specific medication dosing decisions should be made by healthcare professionals who may consider additional factors and potentially measured GFR values.