CT Severity Index (CTSI/Balthazar) for Acute Pancreatitis
CT-based severity scoring for acute pancreatitis. Combines Balthazar Grade (A-E, based on pancreatic/peripancreatic inflammation) and necrosis percentage. CTSI range 0-10. Score 7-10 = severe; associated with 17% complication rate and 17% mortality. Developed by Balthazar et al. 1990. Used alongside clinical scores (BISAP, APACHE II) for severity stratification.
Score interpretation
CTSI 0-3 -- low severity acute pancreatitis; morbidity approximately 8%
→ IV fluid resuscitation (Ringer's lactate preferred -- reduces SIRS vs normal saline); nil by mouth initially; analgesia (IV morphine or ketamine); regular observations; monitor: FBC, CRP (peak at 48-72h), urine output; early enteral nutrition (within 24-48h of admission if tolerating) -- reduces complications; no antibiotics unless infection suspected; repeat clinical assessment at 48-72h; early discharge possible if pain controlled and tolerating diet; most will not need repeat CT at this severity.
CTSI 4-6 -- moderate severity; morbidity approximately 35%
→ HDU or close monitoring; aggressive IV fluid resuscitation (250-500 mL/hr initially, titrate to urine output above 0.5 mL/kg/hr); early enteral nutrition via NG tube if not tolerating orally (reduces complications and infection risk vs TPN); daily CRP, FBC, renal and liver function; ERCP within 24-48 hours if biliary pancreatitis with cholangitis (not for uncomplicated biliary pancreatitis); consultant gastroenterologist or HPB surgeon input; repeat CT at 5-7 days or sooner if deterioration; gastroenterology/HPB MDT review; consider catheter drainage of symptomatic fluid collections (avoid in first 4 weeks -- WOPN preferred).
CTSI 7-10 -- severe; morbidity approximately 92%, mortality up to 17%
→ ICU admission; aggressive resuscitation and organ support; early enteral nutrition via NJ tube within 24-48h (reduces infectious complications vs TPN); antibiotics only if infected necrosis suspected (meropenem or imipenem if culture/sensitivity unavailable -- note: prophylactic antibiotics not recommended routinely); CT-guided FNA of necrosis if sepsis without source (Gram stain and culture); infected necrotising pancreatitis: step-up approach (percutaneous drain first, then minimally invasive necrosectomy, open only if needed); endoscopic ultrasound-guided drainage for walled-off pancreatic necrosis (WOPN) after 4 weeks; ERCP if gallstone pancreatitis with cholangitis; hepatopancreatobiliary (HPB) surgeon involvement; ITU monitoring of SIRS, organ failure (SOFA score); cholecystectomy before discharge for biliary aetiology (or within 4 weeks for severe) to prevent recurrence.
Interpretation bands for the CTSI Pancreatitis. Apply clinical judgement and local guidance.
References
- Balthazar EJ et al. Acute pancreatitis: value of CT in establishing prognosis. Radiology. 1990;174(2):331-336.
- IAP/APA Working Group. IAP/APA evidence-based guidelines for the management of acute pancreatitis. Pancreatology. 2013;13(4 Suppl 2):e1-e15.
Related
Curated clinical cross-links plus same-class fallbacks.
- Glyceryl Trinitrate (Sublingual / IV) · Nitrate / Acute Angina
- Dobutamine (Acute HF / Stress Echo) · Inotrope / Acute Heart Failure
- Milrinone · Inodilator / Acute Heart Failure
- Prednisolone (Systemic) · Systemic Corticosteroid — Acute Dermatoses
- Methoxyflurane · Inhaled Analgesic — Acute Pain
- Orlistat · Pancreatic lipase inhibitor
Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.