Calculator Inputs
Enter admission values and 48-hour changes. Results appear above this form after submission.
Formula Used
Each positive criterion scores one point. The calculator sums admission points and 48-hour points to produce the total Ranson score.
Nonbiliary model: 5 admission criteria + 6 post-48-hour criteria = maximum 11 points.
Biliary model: 5 admission criteria + 5 post-48-hour criteria = maximum 10 points.
Common interpretation: 0–2 lower predicted severity, 3–4 severe likely, 5–6 high predicted severity, 7+ very high predicted severity.
| Model | Admission thresholds | 48-hour thresholds |
|---|---|---|
| Nonbiliary | Age >55, WBC >16,000, glucose >200, LDH >350, AST >250 | Hct fall >10%, BUN rise ≥5, calcium <8, PaO₂ <60, base deficit >4, fluids >6 L |
| Biliary | Age >70, WBC >18,000, glucose >220, LDH >400, AST >250 | Hct fall >10%, BUN rise ≥2, calcium <8, base deficit >5, fluids >4 L |
How to Use This Calculator
- Select the clinical model that matches the pancreatitis etiology.
- Enter the five admission variables in the input grid.
- Enter the measured changes and labs from the first 48 hours.
- Click the calculate button to generate the score and risk band.
- Review the criteria table to see which findings added points.
- Use the chart and export buttons for case review or documentation.
- Do not rely on this score alone for treatment decisions.
Example Data Table
| Case | Model | Age | WBC | Glucose | LDH | AST | 48-hour positives | Total score | Interpretation |
|---|---|---|---|---|---|---|---|---|---|
| Example A | Nonbiliary | 62 | 17,800 | 214 | 380 | 220 | Hct fall, BUN rise, calcium, PaO₂, base deficit, fluids | 9 / 11 | Very high predicted severity |
| Example B | Biliary | 74 | 19,200 | 228 | 420 | 275 | Hct fall, BUN rise, calcium | 8 / 10 | Very high predicted severity |
Frequently Asked Questions
1. What does this calculator estimate?
It estimates the historic severity risk of acute pancreatitis using Ranson admission findings and 48-hour follow-up findings.
2. Why are there biliary and nonbiliary options?
Thresholds differ by pancreatitis etiology. The biliary version uses modified cutoffs and one fewer 48-hour criterion.
3. When should the score be finalized?
The score is finalized after 48 hours because several criteria depend on changes that occur during early inpatient monitoring.
4. What score suggests severe pancreatitis?
A score of 3 or more suggests severe acute pancreatitis is more likely and closer monitoring is usually warranted.
5. Does this score diagnose pancreatitis?
No. It estimates severity after diagnosis. Clinical history, examination, imaging, and laboratory evaluation remain essential.
6. Can this tool guide treatment by itself?
No. It should support, not replace, physician judgment, local protocols, hemodynamic assessment, and broader severity evaluation.
7. Why is PaO₂ excluded in biliary mode here?
This page uses the common modified biliary model with five 48-hour criteria. Always confirm the preferred local reference.
8. Can I save the result for chart review?
Yes. Use the built-in CSV and PDF buttons to export the summary, chart inputs, and criteria breakdown.