Ranson Criteria (Acute Pancreatitis, Non-Gallstone)

Ranson Criteria (Acute Pancreatitis, Non-Gallstone) | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Health
Input types: checkbox
Output type: json
Sample coverage: 4
API ready: Yes

Overview

The Ranson Criteria calculator scores the classic non-gallstone form of acute pancreatitis using five admission findings and six findings at 48 hours. It returns a total score from 0 to 11, the admission and 48-hour subscores, and a severity category with an estimated mortality range. It is not medical advice.

When to use

Use it to calculate the classic Ranson score for suspected acute pancreatitis that is not gallstone-related.
Use it when admission findings and 48-hour clinical or laboratory criteria are available.
Use it as a structured severity reference alongside clinical assessment, not as a standalone treatment or diagnostic decision.

How it works

1Select each admission criterion that is present: age over 55, WBC over 16,000/µL, glucose over 200 mg/dL, AST over 250 IU/L, or LDH over 350 IU/L.
2Select each 48-hour criterion that is present: hematocrit fall over 10%, BUN rise over 5 mg/dL, calcium below 8 mg/dL, PaO₂ below 60 mmHg, base deficit over 4 mEq/L, or fluid sequestration over 6 L.
3Each selected criterion adds one point, producing separate admission and 48-hour scores.
4The tool returns the total score and category: mild, moderate, severe, or very severe.

Use cases

Clinicians can organize admission and 48-hour pancreatitis findings into a single severity score.
Medical students can review how each Ranson criterion contributes to the total.
Clinical documentation and case discussions can use the separate admission, 48-hour, and total scores as a structured reference.

Examples

1. Severe pancreatitis with five positive criteria

Emergency clinician

Background

A patient with acute non-gallstone pancreatitis meets three admission criteria and two criteria at 48 hours.

Problem

Calculate the total Ranson score and identify the corresponding severity category.

How to use

Select age over 55, WBC over 16,000/µL, and LDH over 350 IU/L at admission. At 48 hours, select calcium below 8 mg/dL and PaO₂ below 60 mmHg.

Admission criteria selected: age, WBC, LDH. 48-hour criteria selected: calcium, PaO₂.

Outcome

The tool returns a total score of 5, with an admission score of 3 and a 48-hour score of 2. This is categorized as severe, with an estimated mortality of about 40%.

2. Mild pancreatitis with one admission factor

Medical student

Background

A patient meets only the age criterion at admission, while all other listed criteria are absent.

Problem

Confirm the score when no additional admission or 48-hour criteria are present.

How to use

Select age over 55 and leave the other ten criteria unselected.

FAQ

What form of pancreatitis does this calculator assess?

It assesses the classic non-gallstone, or non-biliary, Ranson criteria.

How many points can the Ranson score include?

The score ranges from 0 to 11, with five admission criteria and six 48-hour criteria.

When are the 48-hour criteria evaluated?

They are evaluated at 48 hours, including changes compared with admission when specified.

How is the total score interpreted?

Scores of 0-2 are mild, 3-4 moderate, 5-6 severe, and 7 or higher very severe.

Does this calculator provide medical advice?

No. It provides a historical scoring result and should not replace clinical judgment or medical care.

Selected criterion: age. All WBC, glucose, AST, LDH, hematocrit, BUN, calcium, PaO₂, base deficit, and fluid sequestration criteria are unselected.

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Continue with connected tools and hubs

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Severe pancreatitis with five positive criteria

2. Mild pancreatitis with one admission factor

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