Evaluation of the mechanical properties of current biliary self-expandable metallic stents: axial and radial force, and axial force zero border.

Background/aims: Mechanical properties (MPs) and axial and radial force (AF and RF) may influence the efficacy and complications of self-expandable metallic stent (SEMS) placement. We measured the MPs of various SEMSs and examined their influence on the SEMS clinical ability.

Methods: We evaluated the MPs of 29 types of 10-mm SEMSs.