Ckd Epi Calculadora

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CKD-EPI GFR Calculator (2021)

Estimated GFR: mL/min/1.73m²

CKD Stage:

function calculateCkdEpi() { var creatinine = parseFloat(document.getElementById('creatinine').value); var age = parseInt(document.getElementById('age').value); var sex = document.querySelector('input[name="sex"]:checked').value; if (isNaN(creatinine) || creatinine <= 0 || isNaN(age) || age = 90) { ckdStage = 'G1 (Normal or High)'; } else if (gfr >= 60) { ckdStage = 'G2 (Mildly Decreased)'; } else if (gfr >= 45) { ckdStage = 'G3a (Mildly to Moderately Decreased)'; } else if (gfr >= 30) { ckdStage = 'G3b (Moderately to Severely Decreased)'; } else if (gfr >= 15) { ckdStage = 'G4 (Severely Decreased)'; } else { ckdStage = 'G5 (Kidney Failure)'; } document.getElementById('gfrResult').innerText = gfr.toFixed(2); document.getElementById('ckdStageResult').innerText = ckdStage; document.getElementById('result').style.display = 'block'; document.getElementById('result').style.backgroundColor = '#e9f7ef'; document.getElementById('result').style.borderColor = '#d4edda'; document.getElementById('result').style.color = '#155724'; }

Understanding the CKD-EPI GFR Calculator (2021)

The CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) GFR Calculator is a vital tool used by healthcare professionals to estimate Glomerular Filtration Rate (GFR). GFR is considered the best overall measure of kidney function. This calculator uses the 2021 CKD-EPI equation, which is an updated formula that no longer includes race as a variable, aiming for more equitable and accurate assessments of kidney function across all populations.

What is GFR and Why is it Important?

GFR measures how much blood your kidneys filter per minute. Healthy kidneys filter waste products and excess water from your blood, producing urine. A lower GFR indicates that your kidneys are not functioning as well as they should, which can be a sign of chronic kidney disease (CKD).

  • Early Detection: Estimating GFR helps in the early detection of kidney disease, allowing for timely intervention and management.
  • Monitoring Progression: Regular GFR measurements help track the progression of kidney disease over time.
  • Medication Dosing: GFR is crucial for adjusting dosages of medications that are cleared by the kidneys.

How the CKD-EPI Equation Works

The 2021 CKD-EPI equation estimates GFR based on three key factors:

  1. Serum Creatinine (mg/dL): Creatinine is a waste product from muscle metabolism. Healthy kidneys filter creatinine efficiently, so higher levels in the blood can indicate reduced kidney function.
  2. Age (Years): Kidney function naturally declines with age, so age is an important factor in the calculation.
  3. Sex: Biological differences between males and females, particularly in muscle mass, influence creatinine levels and are accounted for in the formula.

Unlike older equations, the 2021 CKD-EPI formula provides a more accurate and universally applicable estimate of GFR by removing the race coefficient, which was found to contribute to health disparities.

Interpreting Your GFR Results and CKD Stages

The estimated GFR is reported in milliliters per minute per 1.73 square meters (mL/min/1.73m²), which normalizes the result to an average body surface area. The result is then categorized into stages of CKD:

  • G1: GFR ≥ 90 mL/min/1.73m² – Normal or high kidney function.
  • G2: GFR 60-89 mL/min/1.73m² – Mildly decreased kidney function.
  • G3a: GFR 45-59 mL/min/1.73m² – Mildly to moderately decreased kidney function.
  • G3b: GFR 30-44 mL/min/1.73m² – Moderately to severely decreased kidney function.
  • G4: GFR 15-29 mL/min/1.73m² – Severely decreased kidney function.
  • G5: GFR < 15 mL/min/1.73m² – Kidney failure (requiring dialysis or transplant).

Examples of CKD-EPI Calculation

Let's look at a few realistic scenarios:

  1. Example 1: Healthy Adult Male
    • Serum Creatinine: 1.0 mg/dL
    • Age: 40 years
    • Sex: Male
    • Estimated GFR: Approximately 95 mL/min/1.73m² (CKD Stage G1) – Indicating normal kidney function.
  2. Example 2: Adult Female with Mildly Decreased Function
    • Serum Creatinine: 1.2 mg/dL
    • Age: 65 years
    • Sex: Female
    • Estimated GFR: Approximately 58 mL/min/1.73m² (CKD Stage G3a) – Suggesting mildly to moderately decreased kidney function.
  3. Example 3: Older Adult Male with Moderately Decreased Function
    • Serum Creatinine: 1.8 mg/dL
    • Age: 75 years
    • Sex: Male
    • Estimated GFR: Approximately 38 mL/min/1.73m² (CKD Stage G3b) – Indicating moderately to severely decreased kidney function.

Disclaimer: This calculator provides an estimate of GFR based on the 2021 CKD-EPI equation. It is intended for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for any health concerns or before making any decisions related to your health or treatment.

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