title: Effectiveness of the J-Tip Guidewire for Selective Biliary Cannulation Compared to Conventional Guidewires (The JANGLE Study).
abstract: BACKGROUND
  Wire-guided cannulation has become a common biliary cannulation technique worldwide. Different guidewires with various tip shapes and materials have been reportedly used for wire-guided cannulation. However, there are apparently no studies reporting changes in the biliary cannulation rate according to the type of guidewire used.
  
  
  OBJECTIVE
  We evaluated the effectiveness of the J-tip guidewire for biliary cannulation.
  
  
  METHODS
  We conducted a prospective, multicenter, controlled study involving patients with a native papilla who required biliary cannulation. We allocated the patients to the J-tip guidewire or angled-tip guidewire groups (groups J and A, respectively). If biliary cannulation was not achieved within 10 min, the GW was changed and cannulation was continued.
  
  
  RESULTS
  Groups J and A consisted of 66 and 65 enrolled patients, respectively. The biliary cannulation rate with a single guidewire for the first 10 min was 84.8 % (56/66) for group J and 80.0 % (52/65) for group A. The final success rate for biliary cannulation was 100 % in both groups. The mean times necessary for biliary cannulation were 285.8 and 267.6 s in group J and group A, respectively. The incidence rates of complications (i.e., all mild pancreatitis) were 3.0 % (2/66) and 6.2 % (4/65) in group J and group A, respectively. The mean amylase concentrations were 168.0 and 297.7 IU/L in group J and group A, respectively. There were no significant differences in any results between both groups.
  
  
  CONCLUSIONS
  The biliary cannulation rate of the J-tip guidewire was not significantly different from those of standard guidewires.
authors.affiliation: Department of Gastroenterology and Hepatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan, tsuchiya@tokyo-med.ac.jp.
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Tsuchiya
authors.forename: Takao
authors.initials: T
authors.lastname: Itoi
authors.forename: Iruru
authors.initials: I
authors.lastname: Maetani
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Shigoka
authors.forename: Nobuhito
authors.initials: N
authors.lastname: Ikeuchi
authors.forename: Junko
authors.initials: J
authors.lastname: Umeda
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sofuni
authors.forename: Fumihide
authors.initials: F
authors.lastname: Itokawa
authors.forename: Kentaro
authors.initials: K
authors.lastname: Ishii
authors.forename: Toshio
authors.initials: T
authors.lastname: Kurihara
authors.forename: Shujiro
authors.initials: S
authors.lastname: Tsuji
authors.forename: Reina
authors.initials: R
authors.lastname: Tanaka
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Tonozuka
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Honjyo
authors.forename: Shuntaro
authors.initials: S
authors.lastname: Mukai
authors.forename: Fuminori
authors.initials: F
authors.lastname: Moriyasu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001660:Biliary Tract Diseases / Q000175:diagnosis; D002404:Catheterization / Q000295:instrumentation*; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies