title: Stent selection and tips on placement technique of EUS-guided biliary drainage: transduodenal and transgastric stenting.
abstract: Endoscopic ultrasonography-guided biliary drainage (EUS-BD) has been carried out as an alternative to the percutaneous or surgical approach when endoscopic retrograde cholangiopancreatography fails. However, there is no standard technique or device for EUS-BD. In this review, we focus on how we choose the stents and described our tips on this EUS-BD technique. The plastic stent (PS) and the self-expandable metallic stent (SEMS) are used for EUS-BD. The latter is further divided into the fully covered SEMS (FCSEMS), partially covered SEMS (PCSEMS), and uncovered SEMS (UCSEMS) types. Although PS is not expensive, the duration of stent patency is short. SEMS is expensive but the duration of stent patency is long. With UCSEMS, basically there is no stent malpositioning; however, if the gap between the bile duct and the GI tract becomes displaced, bile leakage from the mesh of the stent is likely to occur. Though there is no bile leakage with FCSEMS, the side branch of the bile duct may become occluded, and migration and dislocation sometimes occur. PCSEMS is basically similar to FCSEMS. When EUS-BD was first developed, drainage by PS was common, although reports on drainage by SEMS have increased recently.
authors.affiliation: Department of Gastroenterology and Hepatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjukuku, Tokyo, Japan. itoi@tokyo-med.ac.jp
authors.forename: Takao
authors.initials: T
authors.lastname: Itoi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Isayama
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sofuni
authors.forename: Fumihide
authors.initials: F
authors.lastname: Itokawa
authors.forename: Toshio
authors.initials: T
authors.lastname: Kurihara
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Tsuchiya
authors.forename: Shujiro
authors.initials: S
authors.lastname: Tsuji
authors.forename: Kentaro
authors.initials: K
authors.lastname: Ishii
authors.forename: Nobuhito
authors.initials: N
authors.lastname: Ikeuchi
authors.forename: Reina
authors.initials: R
authors.lastname: Tanaka
authors.forename: Junko
authors.initials: J
authors.lastname: Umeda
authors.forename: Fuminori
authors.initials: F
authors.lastname: Moriyasu
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawakami
mesh_terms: D002779:Cholestasis / Q000000981:diagnostic imaging / Q000601:surgery*; D004322:Drainage / Q000379:methods*; D004384:Duodenoscopy / Q000379:methods*; D019160:Endosonography / Q000379:methods*; D005773:Gastroscopy / Q000379:methods*; D006801:Humans; D017410:Practice Guidelines as Topic; D011474:Prosthesis Design; D015607:Stents