🫀 MELD-Na Score Calculator
Calculate the MELD-Na score (UNOS) to estimate 90-day mortality and transplant priority in end-stage liver disease.
Higher score = higher 90-day mortality and transplant priority.
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When to use
Prognosis and liver-transplant prioritisation.
How it works
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.
Key points
- 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.
References
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
Frequently asked 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）