The MELD Calculator (Model for End-Stage Liver Disease) is a vital tool for assessing the severity of chronic liver disease and predicting 3-month survival. It's critical for liver transplant allocation, utilizing bilirubin, creatinine, INR, and sodium levels. Use our MELD-Na calculator for a quick, accurate assessment of liver function and disease prognosis.
Formula:
The MELD-Na score is calculated in two steps:
Step 1: Calculate the MELD Score
MELD = 3.78 × ln(Bilirubin) + 11.2 × ln(INR) + 9.57 × ln(Creatinine) + 6.43
Step 2: Adjust for Sodium (MELD-Na)
MELDNa = MELD - [0.025 × MELD × (140 - Sodium)] + 140
Where:
- Bilirubin: Total bilirubin (mg/dL). Values less than 1.0 are treated as 1.0.
- INR: International Normalized Ratio. Values less than 1.0 are treated as 1.0.
- Creatinine: Serum creatinine (mg/dL). Values less than 1.0 are treated as 1.0, and values greater than 4.0 are treated as 4.0. If the patient has received two or more dialysis treatments within the last 7 days, creatinine is set to 4.0.
- Sodium: Serum Sodium (mEq/L). Values less than 120 are treated as 120, and values greater than 140 are treated as 140.
- ln: Natural logarithm.