Display Settings:


Send to:

Choose Destination
We are sorry, but NCBI web applications do not support your browser and may not function properly. More information
Gastrointest Endosc. 2011 Jan;73(1):64-70. doi: 10.1016/j.gie.2010.09.039.

Anchoring flap versus flared end, fully covered self-expandable metal stents to prevent migration in patients with benign biliary strictures: a multicenter, prospective, comparative pilot study (with videos).

Author information

  • 1Division of Gastroenterology, Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea. dhpark@amc.seoul.kr



Recently, placement of fully covered self-expandable metal stents (FCSEMSs) has been proposed as an alternative treatment for the management of benign biliary strictures. However, the major limitations of FCSEMSs are frequent migration and removal complications.


We conducted this study to compare the antimigration effects, complication rates, and short-term efficacy of 2 FCSEMSs with either an anchoring flap (AF) or a flared end (FE) at the proximal end of the stent.


A multicenter, prospective comparative pilot study.


Two tertiary referral centers.


A total of 43 patients with benign biliary stricture who were candidates for placement of FCSEMSs were assigned to the AF (n = 22) or the FE group (n = 21).


Predefined duration of placement and removal of FCSEMSs.


After a median period of placement of 6 months (interquartile range 4-6), no patients in the AF group and 33% of patients (7 of 21, 1 in proximal and 6 in distal) in the FE group had stent migration (P = .004). The removal rate of the FCSEMSs was 100% in both groups (per protocol, n = 22 in the AF group and n = 17 in the FE group). Immediate improvement of biliary stricture was 91% (20/22, per protocol) in the AF group and 88% (15/17, per protocol) in the FE group. All stents were removed without difficulty.


Short-term follow-up after the removal of FCSEMSs.


With regard to the antimigration effect of FCSEMSs for benign biliary stricture, the AF design may be superior to the FE. For up to 6 months, both FCSEMSs can be endoscopically removed without complications. (Clinical trial registration number: NCT00945516.).

Copyright © 2011 American Society for Gastrointestinal Endoscopy. Published by Mosby, Inc. All rights reserved.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk