Test methods for evaluation of balloon expandable vascular stents – measurement of radial strength and stiffness

Abstract

The radial strength of balloon expandable stents represents a key property for a successful recanalization of sclerotic blood vessels. This study focuses on the most commonly used method for investigation of radial strength and radial stiffness via segmented head test setup. A custom made user software was used for evaluation of the radial force curves considering requirements of international standards such as ASTM F3067. Contributing factors during measurement such as friction and test setup deformation as well as the single cycle and multi cycle approach were addressed and discussed.

Keywords

• vascular stents
• radial strength
• radial stiffness
• iso
• fda
• astm