title: Preservation of papillary relaxation after endoscopic papillary balloon dilation.
abstract: OBJECTIVE
  Endoscopic papillary balloon dilation has been accepted as a less hazardous alternative to endoscopic sphincterotomy for removal of bile duct stones in patients with impaired hemostasis. Several manometric studies have suggested that endoscopic papillary balloon dilation can be expected to preserve papillary function. However, the aspect of the preservation of postprandial relaxation has not been addressed.
  
  
  METHODS
  Seven, 7 and 6 patients underwent fatty-meal magnetic resonance cholangiography before endoscopic papillary balloon dilation for the treatment of common bile duct stones, and then 12 and 24 months after the procedure. Seven patients were employed as controls. Magnetic resonance cholangiography images were obtained on a 1.5-Tesla scanner (Signa Horizon, GE Medical Systems, Milwaukee, WI) with a phased-array torso coil. After an overnight fast, magnetic resonance cholangiography was performed before and after fatty-meal ingestion.
  
  
  RESULTS
  No patients showed significant postprandial increase of the bile duct diameter except one patient with stone impaction during the examination.
  
  
  CONCLUSIONS
  Endoscopic papillary balloon dilation may preserve the papillary function of postprandial relaxation.
authors.affiliation: Department of Gastroenterology University of Tokyo, Bunkyo-ku, Tokyo, 113-8655, Japan. shintaro1972jp@yahoo.co.jp
authors.forename: Shintaro
authors.initials: S
authors.lastname: Kondo
authors.forename: Natsuyo
authors.initials: N
authors.lastname: Yamamoto
authors.forename: Yousuke
authors.initials: Y
authors.lastname: Nakai
authors.forename: Naoki
authors.initials: N
authors.lastname: Sasahira
authors.forename: Kenji
authors.initials: K
authors.lastname: Hirano
authors.forename: Takeshi
authors.initials: T
authors.lastname: Tsujino
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Isayama
authors.forename: Nobuo
authors.initials: N
authors.lastname: Toda
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Komatsu
authors.forename: Minoru
authors.initials: M
authors.lastname: Tada
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Yoshida
authors.forename: Takao
authors.initials: T
authors.lastname: Kawabe
authors.forename: Kuni
authors.initials: K
authors.lastname: Otomo
authors.forename: Masao
authors.initials: M
authors.lastname: Omata
mesh_terms: D000328:Adult; D000368:Aged; D014670:Ampulla of Vater / Q000473:pathology; D002404:Catheterization / Q000379:methods*; D049448:Cholangiopancreatography, Magnetic Resonance; D003135:Common Bile Duct / Q000473:pathology; D005260:Female; D042882:Gallstones / Q000175:diagnosis / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D016717:Sphincterotomy, Endoscopic / Q000379:methods*