What Modified Marshall Score indicates organ failure?

Modified Marshall Score: respiratory (PaO2/FiO2), renal (creatinine), cardiovascular (BP response) each scored 0-4; score ≥2 in any system = organ failure; persistent organ failure (>48h) = severe AP with 30-40% mortality.

What is the BISAP score for early acute pancreatitis severity?

BISAP = BUN >25 + Impaired mental status (GCS 60 + Pleural effusion; score 0-5; BISAP 0-1: <1% mortality; BISAP 2: 3.6%; BISAP 3: 5.3%; BISAP ≥4: 9.5-22% mortality.

What is the Revised Atlanta Classification of AP severity?

Mild: no organ failure, no local complications; Moderately severe: transient organ failure (<48h) or local complications; Severe: persistent organ failure (≥48h in single or multiple organs); associated with 30-50% mortality.

When is CT necessary in acute pancreatitis?

CECT not needed in mild AP; indicated when diagnosis uncertain, no improvement after 48-72h, or suspected complications; modified CT Severity Index (CTSI) adds local complication score to organ failure score for overall severity.

When should antibiotics be given for necrotizing pancreatitis?

Antibiotics NOT recommended prophylactically for necrotizing pancreatitis; indicated only if infected necrosis suspected (fever + rising CRP + CT showing gas in necrosis) or extrapancreatic infection; imipenem or meropenem for infected necrosis.

Acute Pancreatitis Severity (Modified Marshall/BISAP/Atlanta) Score

Calculates acute pancreatitis severity using Modified Marshall Score (respiratory/renal/cardiovascular), BISAP bedside index, and Revised Atlanta Classification to predict necrotizing pancreatitis and mortality.

Weight

Height

Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How It Works

Each component has a specific meaning:

BISAP bedside index — The bisap bedside index recorded for the patient or scenario being assessed.
Revised Atlanta Classification — The revised atlanta classification recorded for the patient or scenario being assessed.

Note: Interpret the pancreatitis severity result against the clinical thresholds and context described above.

How to Use

Enter the BISAP bedside index, Revised Atlanta Classification for the patient or scenario you are assessing. Calculates acute pancreatitis severity using Modified Marshall Score (respiratory/renal/cardiovascular), BISAP bedside index, and Revised Atlanta Classification to predict necrotizing pancreatitis and mortality. Use the pancreatitis severity result to inform your clinical assessment.

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