title: The Loop-Tip Wire for Selective Cannulation during ERCP in Patients with Billroth II Anastomosis: A Preliminary Feasibility Study.
abstract: OBJECTIVE
  Selective cannulation of common bile duct remains technically challenging in patients with Billroth II anastomosis due to an altered anatomy. We aimed to determine the feasibility of performing wire-assisted cannulation using a loop-tip wire during ERCP in patients with Billroth II anastomosis.
  
  
  METHODS
  We retrospectively analyzed a database of nine patients with Billroth II anastomosis who underwent ERCP using a loop-tip wire from January 2009 to July 2013 in the Hallym University Sacred Heart Hospital. Clinical characteristics and procedure-associated clinical outcomes were analyzed.
  
  
  RESULTS
  The mean age of the patients was 73.7 years, and the male/female ratio was 2:1. The success rate of selective biliary cannulation was 77.8%. The mean cannulation time was 3.6 minutes (range, 1-9 minutes). Two patients who had failed in selective cannulation underwent infundibulotomy using a needle-knife papillotome, but one of the two patients had failed in biliary stone removal and finally underwent surgery. Six patients underwent endoscopic sphincterotomy. Complete clearance of bile duct stones was achieved in seven patients in one session. There was one case of mild post-ERCP pancreatitis (11.1%).
  
  
  CONCLUSIONS
  The loop-tip wire can be an alternative instrument for wire-assisted selective cannulation in patients with Billroth II anastomosis.
authors.forename: Seung Yeon
authors.initials: SY
authors.lastname: Chun
authors.forename: Jong Hyeok
authors.initials: JH
authors.lastname: Kim
authors.forename: Sung-Hoon
authors.initials: SH
authors.lastname: Moon
authors.forename: Su Jin
authors.initials: SJ
authors.lastname: Lee
authors.forename: Sookyung
authors.initials: S
authors.lastname: Lim
authors.forename: Ji Won
authors.initials: JW
authors.lastname: Park
authors.forename: Ho Suk
authors.initials: HS
authors.lastname: Kang
authors.forename: Sung Eun
authors.initials: SE
authors.lastname: Kim
authors.forename: Ki Joo
authors.initials: KJ
authors.lastname: Kang
authors.forename: Choong Kee
authors.initials: CK
authors.lastname: Park
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002404:Catheterization / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D057785:Catheters; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000009:adverse effects / Q000379:methods*; D042883:Choledocholithiasis / Q000175:diagnosis / Q000628:therapy*; D003135:Common Bile Duct; D004322:Drainage; D004867:Equipment Design; D005240:Feasibility Studies; D005260:Female; D005763:Gastroenterostomy; D006801:Humans; D008297:Male; D008875:Middle Aged; D056910:Republic of Korea; D012189:Retrospective Studies; D016717:Sphincterotomy, Endoscopic; D016896:Treatment Outcome