| Experimental assessment of proximal stent-graft (InterVascular) fixation in human cadaveric infrarenal aortas. | |
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MedLine Citation:
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PMID: 10071619 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: This paper investigates the radial deformation load of an aortic endoluminal prosthesis and determines the longitudinal load required to cause migration in a human cadaveric aorta of the endoprosthesis. DESIGN AND METHODS: The endovascular prosthesis under investigation was a 24 mm diameter, nitinol, self-expanding aortoaortic device (InterVascular, Clearwater, Florida, U.S.A.). Initially, a motorised digital force gauge developed an incremental load which was applied to the ends of five stent-grafts, to a maximum of 10 mm (42%) compression. Secondly, using a simple bench model, each ends of four stent-grafts were deployed into 10 cadaveric experimental aneurysm necks and a longitudinal load applied to effect distraction. RESULTS: Increasing load produced increasing percentage deformation of the stent-grafts. The mean longitudinal distraction load for an aneurysm neck of 20 mm was 409 g (200-480 g), for 15 mm was 277 g (130-410 g) and for 10 mm was 218 g (130-340 g). The aneurysm diameter and aortic calcification had p values of 0.002 and 0.047, respectively, while the p value for aneurysm neck length was less than 0.00001. CONCLUSIONS: These results suggest that there is a theoretical advantage of oversizing an aortic prosthesis and that sufficient anchorage is achieved in an aortic neck of 10 mm to prevent migration when fully deployed. |
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Authors:
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A W Lambert; D J Williams; J S Budd; M Horrocks |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery Volume: 17 ISSN: 1078-5884 ISO Abbreviation: Eur J Vasc Endovasc Surg Publication Date: 1999 Jan |
Date Detail:
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Created Date: 1999-03-22 Completed Date: 1999-03-22 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9512728 Medline TA: Eur J Vasc Endovasc Surg Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 60-5 Citation Subset: IM |
Affiliation:
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University Department of Surgery, Royal United Hospital, Bath, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aorta, Abdominal
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physiopathology,
surgery* Aortic Aneurysm, Abdominal / physiopathology, surgery Biomechanics Blood Vessel Prosthesis Implantation* Equipment Failure Analysis Humans Models, Cardiovascular Prosthesis Design Stents* Tensile Strength Weight-Bearing |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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