Calculadora de Escore MELD
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
MELD = 3,78·ln(bil) + 11,2·ln(INR) + 9,57·ln(cr) + 6,43
About this calculator
The MELD Score Calculator is a clinical tool that estimates the severity of end-stage liver disease. It uses three lab tests: bilirubin (bile function), INR (blood clotting), and creatinine (kidney function). The result is a number from 6 to 40, used to prioritize patients on the liver transplant waiting list.
The calculation follows the formula MELD = 3.78 × ln(bilirubin) + 11.2 × ln(INR) + 9.57 × ln(creatinine) + 6.43. The natural logarithm (ln) of each variable normalizes the data. A higher score indicates greater transplant urgency. Scores above 30 suggest high three-month mortality risk.
This calculator is used by hepatologists and surgeons for fair organ allocation. Patients with higher MELD scores receive priority. It also aids in prognosis for cirrhosis, alcoholic hepatitis, and acute liver failure. It does not replace a complete medical evaluation.
Important caveats: extreme creatinine or bilirubin values can skew the score. Dialysis patients have adjusted creatinine. MELD does not consider complications like ascites or encephalopathy, which also affect prognosis. Always interpret results alongside clinical context.
Frequently asked questions
What is the difference between MELD and MELD-Na?
MELD-Na includes serum sodium in the formula, improving prognostic accuracy in patients with ascites. Traditional MELD does not consider sodium.
Can the MELD score be used in children?
No, for children the PELD (Pediatric End-Stage Liver Disease) is used, which includes albumin and age.
What does a MELD of 15 mean?
A score of 15 indicates moderate three-month mortality risk. It is often the cutoff for starting transplant evaluation.
Do I need to fast for the lab tests?
No specific fasting is required, but follow your doctor's instructions for blood collection.
Can MELD change from day to day?
Yes, because it depends on lab values that can fluctuate with hydration, medications, and clinical status. It is reassessed periodically.