MELD-Na Calculator

MELD Calculation Form

Creatinine (µmol/L):

Bilirubin (µmol/L):

INR:

Sodium (mmol/L):

Had dialysis twice, or 24 hours of CVVHD, within a week prior to the serum creatinine test?

Yes

Reset

Calculation Results

MELD:

MELD-Na SRTR:

Calculation Date:

About

MELD-Na score is used to predict mortality pre liver transplant, for patients who are 12 years of age and older. The SRTR calculation is used to derive the score.

The Model for End-Stage Liver Disease (MELD-Na) calculator is a numerical scale used to estimate relative disease severity and likely survival of patients awaiting liver transplantation for patients 12 and up. It is based on the MELD-Na calculator developed by the Organ Procurement and Transplantation Network. This calculator is intended for use by health care professionals. The results of this tool should never be used alone to determine a patient’s medical treatment. It is not a substitute for an individual treatment plan developed by a doctor with personal knowledge of a specific patient.

Version: 2.0

Formula

MELD-Na SRTR = MELD + 1.32 * (137 – sodium mmol/L) – [0.033 * MELD * (137 – sodium mmol/L)]

If sodium is less than 125 mmol/L then sodium level will be 125 mmol/L.

If sodium is greater than 137 mmol/L then sodium level will be 137 mmol/L.

MELD = (0.957 x ln(creatinine mg/dL) + 0.378 x ln(bilirubin mg/dL) + 1.120 x ln(INR) + 0.6431) * 10

Laboratory values less than 1.0 are set to 1.0 for the purposes of the MELD score calculation.

If “Had dialysis twice, or 24 hours of CVVHD, within a week prior to the serum creatinine test?” = Yes then creatinine level will be 4.0 mg/dL.

If serum creatinine is greater than 4.0 mg/dL then serum creatinine level will be 4.0 mg/dL.

Creatinine levels in µmol/L will be converted to mg/dL by dividing them by 88.4.

Bilirubin levels in µmol/L will be converted to mg/dL by dividing them by 17.1.

References