title: Resolution of pneumobilia as a predictor of biliary stent occlusion.
abstract: OBJECTIVE
  To predict biliary stent occlusion on computed tomography (CT) from the loss of pneumobilia.
  
  
  METHODS
  A total of 66 patients with common bile duct stents with pneumobilia after initial stent placement had a follow-up CT and diagnostic endoscopic retrograde cholangiopancreatography (ERCP). Two readers evaluated all CT exams for pneumobilia. Resolution or decrease of pneumobilia on CT was compared with ERCP findings.
  
  
  RESULTS
  Sensitivity and specificity was 60-64% and 95% with a positive predictive value of 97% and a negative predictive value of 49-51%.
  
  
  CONCLUSIONS
  Resolution or reduction of pneumobilia after stent placement is specific (95%) and is moderately accurate (70-73%) for predicting biliary stent occlusion.
authors.affiliation: University of Chicago Medical Center Department of Radiology, 5841 South Maryland Avenue, MC 2026, Chicago, IL 60637. Electronic address: sthomas@hotmail.com.
authors.forename: Stephen
authors.initials: S
authors.lastname: Thomas
authors.affiliation: University of Chicago Medical Center Department of Radiology, 5841 South Maryland Avenue, MC 2026, Chicago, IL 60637. Electronic address: rinappatel@gmail.com.
authors.forename: Rina P
authors.initials: RP
authors.lastname: Patel
authors.affiliation: University of Chicago Medical Center Department of Radiology, 5841 South Maryland Avenue, MC 2026, Chicago, IL 60637. Electronic address: aoto@radiology.bsd.uchicago.edu.
authors.forename: Aytekin
authors.initials: A
authors.lastname: Oto
mesh_terms: D000328:Adult; D000368:Aged; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003135:Common Bile Duct / Q000000981:diagnostic imaging* / Q000601:surgery; D003137:Common Bile Duct Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D015607:Stents; D016896:Treatment Outcome
keywords: Biliary stent; Computed tomography; Endoscopic retrograde cholangiopancreatography; Pneumobilia