title: A comparison of the consensus and clinical definitions of pancreatitis with a proposal to redefine post-endoscopic retrograde cholangiopancreatography pancreatitis.
abstract: OBJECTIVE
  We evaluated the correlation between the consensus and clinical definitions of pancreatitis following endoscopic retrograde cholangiopancreatography (ERCP), with the objective of updating and revising the definition of post-ERCP pancreatitis (PEP).
  
  
  METHODS
  Three hundred patients were subjected to serial serum amylase & lipase levels testing and abdominal computed tomography scan for abdominal pain after ERCP. Main outcome measures included the correlation between consensus and clinical definitions.
  
  
  RESULTS
  Using consensus criteria, 25 patients had acute pancreatitis (11 of mild and 14 of moderate severity). Forty-three patients had acute pancreatitis using the clinical definitions (18 of mild and 25 of moderate severity). At 4 hours, serum hyperamylasemia of under 1.5-fold and at 12 hours a serum hyperamylasemia of under 2-fold had a negative predictive value of 0.94 for development of PEP. Serum hyperamylasemia following ERCP had a poor positive predictive value for PEP.
  
  
  CONCLUSIONS
  Clinical and consensus definitions are poorly correlated; use of the latter leads to significant underrecognition of PEP. The adoption of clinical definition results in uniformity of diagnosis of pancreatitis for clinical care and research. Serum amylase levels at 4 and 12 hours after ERCP have a high negative predictive value for PEP.
authors.affiliation: University of São Paulo Medical School, São Paulo, Brazil.
authors.forename: Everson L A
authors.initials: EL
authors.lastname: Artifon
authors.forename: Adrienne
authors.initials: A
authors.lastname: Chu
authors.forename: Martin
authors.initials: M
authors.lastname: Freeman
authors.forename: Paulo
authors.initials: P
authors.lastname: Sakai
authors.forename: Ashar
authors.initials: A
authors.lastname: Usmani
authors.forename: Atul
authors.initials: A
authors.lastname: Kumar
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000681:Amylases / Q000097:blood; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010195:Pancreatitis / Q000097:blood / Q000175:diagnosis*; D011237:Predictive Value of Tests
chemical_list: D000681:Amylases