title: Endoscopic biliary sphincterotomy is not required for transpapillary SEMS placement for biliary obstruction.
abstract: BACKGROUND
  Endoscopic retrograde cholangiopancreatography with biliary self-expanding metal stent placement is the preferred method of providing biliary drainage for pancreaticobiliary malignancies. Some endoscopists routinely perform biliary sphincterotomy to facilitate biliary stent placement and potentially minimize pancreatitis with transpapillary self-expanding metal stent placement.
  
  
  OBJECTIVE
  Our hypothesis was that biliary sphincterotomy has no effect on the success rate of transpapillary self-expanding metal stent placement and increases procedure-related complications.
  
  
  METHODS
  In a retrospective analysis, outcomes of two groups were compared: (1) self-expanding metal stent placement without biliary sphincterotomy, (2) self-expanding metal stent placement with biliary sphincterotomy during the same procedure. Complications and stent patency rates were evaluated.
  
  
  RESULTS
  There were 104 subjects included in the study. Post-sphincterotomy bleeding (p = 0.001) was associated with biliary sphincterotomy performed immediately prior to self-expanding metal stent placement. Importantly, self-expanding metal stent placement without biliary sphincterotomy was always technically successful and self-expanding metal stent placement without biliary sphincterotomy was not associated with pancreatitis.
  
  
  CONCLUSIONS
  Patients who undergo biliary sphincterotomy during transpapillary self-expanding metal stent placement experience more immediate complications than those who do not. Biliary sphincterotomy was not associated with longer stent patency. Self-expanding metal stent placement without a biliary sphincterotomy was not associated with pancreatitis regardless of the type of self-expanding metal stent used (covered or uncovered). Of the patients without a biliary sphincterotomy, 100% had successful stent placement, further arguing against its use in this setting.
authors.affiliation: Division of Gastroenterology and Hepatology, Huntsman Cancer Center, University of Utah School of Medicine, Salt Lake City, UT, USA.
authors.forename: Nikhil
authors.initials: N
authors.lastname: Banerjee
authors.forename: Kristen
authors.initials: K
authors.lastname: Hilden
authors.forename: Todd H
authors.initials: TH
authors.lastname: Baron
authors.forename: Douglas G
authors.initials: DG
authors.lastname: Adler
mesh_terms: D000368:Aged; D005260:Female; D006470:Hemorrhage / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010195:Pancreatitis / Q000209:etiology; D012189:Retrospective Studies; D016717:Sphincterotomy, Endoscopic / Q000009:adverse effects / Q000379:methods*; D015607:Stents