Glasgow (Imrie) Pancreatitis Score Calculator — Severity at 48 Hours

How to Use This Calculator

1. Collect all 8 laboratory values at 48 hours from symptom onset.
2. Select each criterion that is positive.
3. Glasgow score and severity display instantly.
4. Use the vs Ranson tab to compare with Ranson severity classification.

Formula

Example

Frequently Asked Questions

• What is the Glasgow pancreatitis score? ▼
  The Glasgow pancreatitis score, also called the Imrie score or Glasgow-Imrie score, is a validated clinical scoring system for predicting the severity of acute pancreatitis using eight laboratory criteria assessed at 48 hours after admission. It was originally described by Imrie and colleagues at the Glasgow Royal Infirmary, published in the British Journal of Surgery in 1978, and subsequently modified by Blamey et al. in 1984. The eight criteria are remembered using the mnemonic PANCREAS: PaO₂ (arterial oxygen below 60 mmHg), Age (greater than 55 years), Neutrophils/WBC (white blood cell count above 15,000/mm³), Calcium (serum calcium below 8 mg/dL or 2 mmol/L), Renal/Urea (BUN/urea above 44.8 mg/dL or 16 mmol/L), Enzymes/LDH (LDH above 600 IU/L), Albumin (below 3.2 g/dL or 32 g/L), and Sugar/Glucose (above 180 mg/dL or 10 mmol/L). Each criterion scores 1 point when present. A total score of 3 or more at 48 hours defines severe acute pancreatitis. The Glasgow score is widely used in the United Kingdom, Australia, and parts of Europe as the primary bedside pancreatitis severity tool.
• How does Glasgow compare to Ranson criteria for pancreatitis? ▼
  Glasgow and Ranson are the two most widely used pancreatitis severity scores worldwide, and they have broadly comparable predictive performance for identifying severe pancreatitis, with AUROCs in the 0.7–0.8 range in most comparative studies. The key practical differences are in assessment structure and geographic adoption. Glasgow uses 8 criteria all assessed at a single 48-hour timepoint, making it simpler to complete as a unit — if values are checked at 48 hours, all components are available simultaneously. Ranson uses 11 criteria split between admission (5) and 48-hour (6) timepoints, requiring two separate assessments but providing earlier information from the admission criteria. Glasgow thresholds differ slightly from Ranson: LDH >600 vs >350, WBC >15k vs >16k, and Glasgow does not include haematocrit drop, BUN rise, or fluid sequestration. Glasgow does include albumin (absent from Ranson). In practice, both scores have limitations — neither captures the clinical dynamics after 48 hours, and both have been partially supplanted by newer scores (BISAP for early 24h assessment, CTSI for morphological staging). Glasgow is preferred in the UK and much of Europe; Ranson remains dominant in North America.
• When is Glasgow score preferred over Ranson? ▼
  Glasgow score is preferred over Ranson in several practical scenarios. First, in settings where a complete single-timepoint 48-hour assessment is operationally easier than tracking admission and follow-up criteria separately — this is common in ward environments where nursing handoffs may interrupt multi-step scoring protocols. Second, in UK, Australian, and European clinical practice where Glasgow is the institutionally embedded standard, meaning staff training and electronic order sets are configured around it. Third, when albumin is available as part of the 48-hour panel — Glasgow's inclusion of albumin as a marker of systemic inflammatory response severity and nutritional status provides pathophysiological information that Ranson's strictly haematological 48-hour criteria do not. Fourth, when using published European and UK pancreatitis guidelines, which reference Glasgow severity thresholds throughout. The British Society of Gastroenterology guidelines recommend Glasgow ≥3 as the threshold for severe pancreatitis requiring ICU-level care and specialist management. There is no clinically meaningful head-to-head superiority of Glasgow over Ranson or vice versa; institutional familiarity is a reasonable basis for choosing between them.
• What defines "severe" pancreatitis by Glasgow score? ▼
  A Glasgow score of 3 or more at 48 hours defines severe acute pancreatitis in the original Blamey et al. 1984 validation study and in current British Society of Gastroenterology guidelines. Severe pancreatitis carries substantial morbidity and mortality, primarily from: pancreatic necrosis (sterile or infected), which occurs in approximately 20% of severe cases and is associated with 20–30% mortality when infected; organ failure (respiratory failure requiring mechanical ventilation, acute kidney injury, cardiovascular instability); and local complications including walled-off necrosis, pancreatic pseudocysts, and splenic vein thrombosis. It is important to distinguish the Glasgow scoring threshold from the revised Atlanta classification of acute pancreatitis severity (2012), which defines severe pancreatitis by the presence of persistent organ failure (>48 hours) regardless of any scoring system, and moderately severe pancreatitis by transient organ failure or local complications without persistent organ failure. A Glasgow score ≥3 identifies patients likely to develop severe disease in the revised Atlanta sense, but severity classification should ultimately be based on clinical evolution, not solely on the initial scoring tool.
• Why are Glasgow and Imrie used interchangeably for this score? ▼
  The terms "Glasgow score," "Imrie score," and "Glasgow-Imrie score" are used interchangeably in the medical literature and refer to the same scoring system. The original paper was published by Clement W. Imrie and colleagues at the Glasgow Royal Infirmary (a major teaching hospital in Glasgow, Scotland) — hence both eponyms are applied. The 1978 original paper by Imrie et al. described a simpler precursor score; Blamey et al. published the modified 8-criterion version in the journal Gut in 1984, which is the form in universal use today. The modification changed some thresholds, added albumin, and refined the criterion definitions. Some references in the UK literature specifically cite the "modified Glasgow criteria" or "Blamey score" to acknowledge this refinement. Internationally, "Glasgow" tends to be used in educational materials and bedside tools, while "Imrie" appears more frequently in older British literature. In clinical practice, these naming differences have no impact on scoring or interpretation — all versions use the same 8-criterion PANCREAS mnemonic with the Blamey 1984 thresholds.

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