MELD-Na Score Calculator — free guideline decision tool
Calculate the MELD-Na score (UNOS) to estimate 90-day mortality and transplant priority in end-stage liver disease.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Bilirubin | 2.0 mg/dL |
|---|---|
| INR | 1.5 |
| Creatinine | 1.2 mg/dL |
| Sodium | 135 mmol/L |
| Dialysis ≥ 2× in past week | No |
→MELD-Na17
- MELD (pre-Na)：15
- Higher score：= greater 90-day mortality / transplant priority
| Bilirubin | 2.0 mg/dL |
|---|---|
| INR | 1.5 |
| Creatinine | 1.2 mg/dL |
| Sodium | 135 mmol/L |
| Dialysis ≥ 2× in past week | Yes |
→MELD-Na28
- MELD (pre-Na)：27
- Higher score：= greater 90-day mortality / transplant priority
Common questions
What is MELD-Na Score Calculator?
Calculate the MELD-Na score (UNOS) to estimate 90-day mortality and transplant priority in end-stage liver disease.
How is MELD-Na Score Calculator calculated? What is the core formula?
MELD = 3.78·ln(bilirubin) + 11.2·ln(INR) + 9.57·ln(creatinine) + 6.43; labs floored at 1.0, creatinine capped at 4.0 (or with dialysis). MELD-Na adds a sodium term when MELD > 11.
When is MELD-Na Score Calculator used?
Prognosis and liver-transplant prioritisation.
What are the key clinical points for MELD-Na Score Calculator?
Higher score = higher 90-day mortality and transplant priority. Creatinine is set to 4.0 with dialysis ≥ 2×/week. Sodium is bounded to 125–137 in the formula.
What are the limits and cautions when using MELD-Na Score Calculator?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
How is MELD-Na Score Calculator calculated in practice? Can you show a worked example?
Inputs: Bilirubin 2.0 mg/dL, INR 1.5, Creatinine 1.2 mg/dL, Sodium 135 mmol/L, Dialysis ≥ 2× in past week No → Result: MELD-Na 17（MELD (pre-Na): 15, Higher score: = greater 90-day mortality / transplant priority） Inputs: Bilirubin 2.0 mg/dL, INR 1.5, Creatinine 1.2 mg/dL, Sodium 135 mmol/L, Dialysis ≥ 2× in past week Yes → Result: MELD-Na 28（MELD (pre-Na): 27, Higher score: = greater 90-day mortality / transplant priority）
Run MELD-Na Score Calculator now
Calculate the MELD-Na score (UNOS) to estimate 90-day mortality and transplant priority in end-stage liver disease.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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