Pancreatitis can be classified by severity according to the Revised ATLANTA criteria 2012

Mild
  • No organ failure
  • No local complications
Moderate
  • Transient organ failure (<48 hours)
Severe
  • Local complications +/-
  • Persistent organ failure

*Local complications include:
Acute peripancreatic fluid collection
Pancreatic pseudocyst
Acute necrotic collection
Pleural effusion