title: Utility of narrow band imaging for identification of the orifice of the bile duct during ERCP.
abstract: Exact identification of the orifice of the bile duct in the major duodenal papilla is required for selective cannulation during endoscopic retrograde cholangiopancreatography (ERCP). However, there are some cases in which the orifice is unclear. The narrow band imaging (NBI) system is an endoscopic imaging technique based on modification of spectral features that enhances visualization of the vascular network. On NBI, bile appears as a bright red fluid, and it is enhanced in the digestive tract. We report two cases in which the NBI was useful for identification of the orifice of the bile duct during ERCP. We recommend the NBI technique before cannulation in cases where the orifice is unclear on the standard image.
authors.affiliation: Department of Internal Medicine, Tokyo Metropolitan Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, Japan. anjiki@cick.jp
authors.forename: Hajime
authors.initials: H
authors.lastname: Anjiki
authors.forename: Terumi
authors.initials: T
authors.lastname: Kamisawa
authors.forename: Naoto
authors.initials: N
authors.lastname: Egawa
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001652:Bile Ducts; D002404:Catheterization / Q000379:methods; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000379:methods*; D042882:Gallstones / Q000175:diagnosis*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male