The Development of In Vitro Abrasion Test Method for Textile and Metal Components of Endovascular Stent Grafts

摘要

In conclusion, this test method was useful in testing abrasion resistance of the components in endovascular stent grafts. The abrasion resistance of both fabrics was lower in a wet environment compared to being tested dry. Additionally, the multifilament polyester fabric had better abrasion resistance than the monofilament polyester fabrics. The laser cut nitinol stent was more aggressive in creating holes and broken yams in both fabrics, while the regular nitinol stent wire caused more fabric strength loss. These conclusion have led to the recommendation of a new in vitro stent-graft abrasion test method for endovascular devices which include the use of this abrasion tester operating for 7,200 cycles (1 hour) under wet conditions and using the three endpoints described above.