Journal
JOURNAL OF VASCULAR ACCESS
Volume 12, Issue 3, Pages 231-238Publisher
SAGE PUBLICATIONS LTD
DOI: 10.5301/JVA.2010.6048
Keywords
Arteriovenous; Bypass graft; Vascular graft; Synthetic access graft
Categories
Funding
- National Institutes of Health [R44 HL09610-02]
- NanoVasc, Inc.
- National Institutes of Health, National Heart Lung and Blood Institute
- Small Business Innovation Research Grant [R44 HL096170-02]
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Purpose: The purpose of this study was to evaluate the NanoVasc Vascular Graft in comparison with a marketed expanded polytetrafluoroethylene (ePTFE) graft, both in vitro and in vivo. The graft was evaluated for use as both a bypass and arteriovenous (AV) access graft. Early-stick capabilities and patency were the primary end points evaluated. Methods: Third party, independent laboratories completed mechanical testing, biocompatibility, and preclinical data collection. An ovine carotid artery interposition model and a canine femoral AV access model were used to evaluate 5-mm and 6-mm internal diameter sizes, respectively. Results: There was no statistical difference in either model between the NanoVasc and ePTFE grafts with respect to patency. Time to hemostasis after cannulation with a 16-gauge needle was achieved similar to 10 times faster with the NanoVasc graft (mean time 27 seconds) compared with ePTFE. Histological analysis demonstrated functional endothelialization (nitric oxide expression), positive wound healing (cellular infiltration into the wall of the graft), and hemocompatibility of the NanoVasc graft. Conclusions: The NanoVasc Vascular Graft is a strong candidate as a bypass and AV access graft. Its early-stick capabilities and patency rates are an attractive feature in comparison with current AV access grafts.
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