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What can we learn from explanted endovascular devices?
Publikationstyp
Journal Article
Date Issued
2002
Sprache
English
Author(s)
Riepe, Gunnar
Heintz, Carsten
Kaiser, Edelgard
Chakfé, Nabil
Delling, M.
Imig, Herbert
Volume
24
Issue
2
Start Page
117
End Page
122
Citation
European Journal of Vascular and Endovascular Surgery 24 (2): 117-122 (2002)
Publisher DOI
Scopus ID
Publisher
Elsevier
Objective: to examine the durability of the Stentor® and Vanguard® endovascular devices in human implants. Methods: the textile covering, the polypropylene ligatures and the stent metal of 34 devices (25 Stentor®, 9 Vanguard®) with a mean duration of implantation of 28.8 ± 16 months was examined by means of stereomicroscopy and scanning electron microscopy. Results: the polyester textile covering showed gaps along the sutured seam and isolated holes in the fabric. All of the examined polypropylene ligatures were worn, some ruptured, four different types of stent corrosion were classified - pits (100%), bizarre craters (68%), large deficiencies (14%) and fractures (32%). Conclusion: holes in the polyester fabric and frame dislocations are specific for the design of Stentor® and Vanguard® grafts. The early corrosion of the stent metal Nitinol® in these devices is surprising. Until more experience is gained with other devices, we have to be reminded, that the "gold standard" for the long-term durability of artificial vascular grafts is still "today's" conventional graft.
Subjects
Corrosion
Endovascular graft
Long-term durability
Nitinol
DDC Class
610: Medicine, Health