Legacy/Original MELD Score Calculator
Calculate the legacy/original three-variable MELD score
How to Use
- Enter serum bilirubin level in mg/dL
- Enter INR (International Normalized Ratio) value
- Enter serum creatinine level in mg/dL
- Click calculate to see the legacy/original MELD score and its severity range
What is the Legacy/Original MELD Score?
The legacy/original MELD score is a historical numerical scale developed for patients undergoing TIPS. This calculator implements that original three-variable formula; it is not MELD 3.0 and must not be used as a current allocation score.
The score ranges from 6 (less ill) to 40 (gravely ill) and is calculated using three laboratory values: serum bilirubin, serum creatinine, and INR (international normalized ratio for prothrombin time).
Original MELD Score Formula
The legacy/original MELD score is calculated using the following formula:
MELD = 3.78×ln(bilirubin mg/dL) + 11.2×ln(INR) + 9.57×ln(creatinine mg/dL) + 6.43
Bilirubin and INR are floored at 1.0, and creatinine is limited to 1.0-4.0 mg/dL. The final score is rounded to the nearest whole number and limited to 6-40. Dialysis handling is not included because dialysis status is not collected.
Limitations of MELD Score
While the MELD score is a valuable tool, it has several limitations:
- Does not capture all complications of liver disease (ascites, encephalopathy, variceal bleeding)
- May underestimate disease severity in patients with hepatocellular carcinoma
- Not validated for acute liver failure
- Dialysis status is not an input, so the original formula's dialysis handling is not included
- Does not account for quality of life or functional status
Frequently Asked Questions
- What does the original MELD score range mean?
- The original MELD score is bounded from 6 to 40. Lower and higher severity ranges should be interpreted by a qualified healthcare professional in the context of the full clinical picture.
- Can MELD scores improve over time?
- Yes, MELD scores can improve if liver function improves through treatment, lifestyle changes, or resolution of acute complications. Conversely, scores can worsen with disease progression.