Evaluation of cover effects on bare stent mechanical response. (August 2016)

• Record Type: Journal Article
• Authors: McGrath, D.J.; O'Brien, B.; Bruzzi, M.; Kelly, N.; Clauser, J.; Steinseifer, U.; McHugh, P.E.
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 61(2016)
• Page Start: 567
• Page End: 580
• Publication Date: 2016-08
• Subjects: Nitinol -- Stent -- Cover -- Tracheobronchial -- Finite element method -- Stent testing; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2016.04.023
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: Covered tracheobronchial stents are used to prevent tumour growth from reoccluding the airways. In the present work a combination of experimental and computational methods are used to present the mechanical effects that adhered covers can have on stent performance. A prototype tracheobronchial stent is characterised in bare and covered configurations using radial force, flat plate and a novel non-uniform radial force test, while computational modelling is performed in parallel to extensively inform the physical testing. Results of the study show that cover configuration can have a significant structural effect on stent performance, and that stent response (bare or covered) is especially loading specific, highlighting that the loading configuration that a stent is about to be subjected to should be considered before stent implantation.