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

作者：Mukai Tsuyoshi^*; Yasuda Ichiro; Isayama Hiroyuki; Nakashima Masanori; Doi Shinpei; Iwashita Takuji; Iwata Keisuke; Kato Tomohiro; Tomita Eiichi; Moriwaki Hisataka

来源：Journal of Hepato-Biliary-Pancreatic Sciences, 2011, 18(5): 646-652.

DOI：10.1007/s00534-011-0406-5

• Self-expandable metallic stent (SEMS)
• Hilar biliary strictures
• Partial stent-in-stent
• Axial force
• Cell width

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.

• 出版日期2011-9