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Table 2 Definition of severity in acute pancreatitis

From: 2019 WSES guidelines for the management of severe acute pancreatitis

Revised Atlanta Classification (RAC) Determinant-based classification (DBC
Mild acute pancreatitis (AP) Mild AP
 No organ failure  No organ failure AND
 No local or systemic complications  No (peri)pancreatic necrosis
Moderately severe AP Moderate AP
 Transient organ failure (< 48 h)  Transient organ failure AND/OR
 Local or systemic complications without persistent organ failure  Sterile (peri)pancreatic necrosis
Severe AP Severe AP
 Persistent single or multiple organ  Persistent organ failure OR
 failure (> 48 h)  Infected (peri)pancreatic necrosis
  Critical AP
   Persistent organ failure AND
 Infected (peri)pancreatic necrosis