MELD-Na score

Enter the most recent laboratory values.

MELD-Na: enter all values

How the score is calculated

Bilirubin, creatinine and INR below 1.0 are set to 1.0.
Creatinine above 4.0 mg/dL (354 µmol/L) is set to 4.0 mg/dL. With dialysis as above, creatinine is set to 4.0 mg/dL.
Sodium is bounded between 125 and 137 mmol/L.
MELD = 10 × (0.957 × ln creatinine + 0.378 × ln bilirubin + 1.120 × ln INR + 0.643), rounded to the nearest whole number. Laboratory values are in mg/dL.
If MELD is above 11: MELD-Na = MELD + 1.32 × (137 − Na) − 0.033 × MELD × (137 − Na).
The final score is rounded to a whole number and capped at 40.

Conversions: bilirubin µmol/L ÷ 17.1 = mg/dL; creatinine µmol/L ÷ 88.4 = mg/dL.

Reference

Kim WR, Biggins SW, Kremers WK, et al. Hyponatremia and mortality among patients on the liver-transplant waiting list. N Engl J Med. 2008;359(10):1018-1026.