eGFR Calculator Kidney Health Australia

CKD-EPI Equation:

\[ eGFR = 141 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.209} \times 0.993^{age} \times (1.018 \text{ if female}) \times (1.159 \text{ if black}) \]

Serum Creatinine (Scr):

mg/dL

Age:

years

Gender:

Race:

Estimated GFR (eGFR):

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1. What Is The eGFR Calculator Kidney Health Australia?

The eGFR Calculator Kidney Health Australia uses the CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) equation to estimate glomerular filtration rate (GFR) from serum creatinine, age, sex, and race. This calculator follows the Kidney Health Australia guidelines and provides accurate assessment of kidney function.

2. How Does The Calculator Work?

The calculator uses the CKD-EPI equation:

\[ eGFR = 141 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.209} \times 0.993^{age} \times (1.018 \text{ if female}) \times (1.159 \text{ if black}) \]

Where:

\( Scr \) — Serum creatinine (mg/dL)
\( \kappa \) — 0.7 (female) or 0.9 (male)
\( \alpha \) — -0.329 (female) or -0.411 (male)
\( age \) — Age in years
1.018 — Female multiplier
1.159 — Black race multiplier

Explanation: This equation accounts for non-linear relationship between creatinine and GFR, with different coefficients for different demographic groups as recommended by Kidney Health Australia.

3. Importance Of eGFR Calculation

Details: Accurate GFR estimation is crucial for diagnosing chronic kidney disease, determining disease stage, and guiding medication dosing according to Kidney Health Australia standards.

4. Using The Calculator

Tips: Enter serum creatinine in mg/dL, age in years, select gender and race. All values must be valid (creatinine > 0, age between 1-120) for accurate Kidney Health Australia eGFR calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why Use CKD-EPI Equation In Australia?
A: The CKD-EPI equation is recommended by Kidney Health Australia as it provides more accurate GFR estimation across different population groups and kidney function levels.

Q2: What Are Normal eGFR Values According To Kidney Health Australia?
A: Normal eGFR is generally ≥90 mL/min/1.73m². Values below 60 mL/min/1.73m² for three months or more indicate chronic kidney disease according to Australian guidelines.

Q3: When Should Creatinine Be Measured For eGFR Calculation?
A: Morning fasting sample is ideal, but random samples are acceptable. Avoid testing after meat-heavy meals or vigorous exercise as per Kidney Health Australia recommendations.

Q4: Are There Limitations To This Equation In Australian Population?
A: The equation performs well in most Australian populations but may be less accurate in Indigenous Australians, extremes of age/weight, and those with rapidly changing kidney function.

Q5: Should This Calculator Be Used For Drug Dosing In Australia?
A: For precise drug dosing, especially with narrow therapeutic index drugs, measured GFR or clinical consultation is recommended in accordance with Australian therapeutic guidelines.