Analysis of Polymeric Braided Tubular Structures Intended for Medical Applications

Abstract

In this study, monofilament tubular braided structures were fabricated and their performances were analyzed. The braided tubes are in three-dimensional form, made of polyester monofilaments intended for use in medical applications. This type of structure, called a stent, is used to open clogged arteries and veins by exerting radial forces. The radial force of a braided tube basically depends on three variables: braid angle, helical length, and braid diameter. The mandrel diameter influences the axial and radial forces obtained from the braid tube. In order to assure a stable structure, the braided fabrics were heat-set. Analysis of variances showed that heat-setting temperatures and heat-setting times of braided fabrics exhibited no significant effects in the range in which the tests were performed.