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Review
. 2011 Sep;18(5):646-52.
doi: 10.1007/s00534-011-0406-5.

Comparison of axial force and cell width of self-expandable metallic stents: which type of stent is better suited for hilar biliary strictures?

Tsuyoshi Mukai  1 , Ichiro Yasuda, Hiroyuki Isayama, Masanori Nakashima, Shinpei Doi, Takuji Iwashita, Keisuke Iwata, Tomohiro Kato, Eiichi Tomita, Hisataka Moriwaki
Affiliations
Review

Comparison of axial force and cell width of self-expandable metallic stents: which type of stent is better suited for hilar biliary strictures?

Tsuyoshi Mukai et al. J Hepatobiliary Pancreat Sci. 2011 Sep.

Abstract

Background: Various types of self-expandable metallic stents (SEMSs) are commercially available. However, few reports have compared the performance of the various SEMSs. In addition to long-term patency, maneuverability during initial placement and feasibility of re-intervention for the stent occlusion are also very important.

Methods: In this retrospective analysis, we compared the duration of stent patency and frequency of re-interventions in 96 patients diagnosed with unresectable hilar biliary strictures in whom initial 10-mm SEMSs were inserted between June 1999 and November 2008.

Results: Based on Kaplan-Meier curves, significantly shorter patency duration was noted for SEMSs with moderate axial force (AF) than for other groups of SEMSs with low AF. Endoscopic re-interventions for SEMS occlusion were easier in a group of SEMSs with low AF and large cell width than in other groups of SEMSs.

Conclusions: With respect to patency duration and the frequency of re-intervention required, we consider that SEMSs with low AF and large cell width are favorable for hilar biliary strictures.

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