Title

Thrombogenic potential of innovia polymer valves versus Carpentier-Edwards Perimount Magna Sortic Bioprosthetic Valves

Document Type

Article

Publication Date

1-1-2011

Department

Mechanical Engineering

Abstract

Trileaflet polymeric prosthetic aortic valves (AVs) produce hemodynamic characteristics akin to the natural AV and may be most suitable for applications such as transcatheter implantation and mechanical circulatory support (MCS) devices. Their success has not yet been realized due to problems of calcification, durability, and thrombosis. We address the latter by comparing the platelet activation rates (PARs) of an improved polymer valve design (Innovia LLC) made from poly(styrene-block-isobutylene-block-styrene) (SIBS) with the commercially available Carpentier-Edwards Perimount Magna Aortic Bioprosthetic Valve. We used our modified prothrombinase platelet activity state (PAS) assay and flow cytometry methods to measure platelet activation of a pair of 19 mm valves mounted inside a pulsatile Berlin left ventricular assist device (LVAD). The PAR of the polymer valve measured with the PAS assay was fivefold lower than that of the tissue valve (p = 0.005) and fourfold lower with flow cytometry measurements (p = 0.007). In vitro hydrodynamic tests showed clinically similar performance of the Innovia and Magna valves. These results demonstrate a significant improvement in thrombogenic performance of the polymer valve compared with our previous study of the former valve design and encourage further development of SIBS for use in heart valve prostheses. Copyright © American Society of Artificial Internal Organs.

DOI

10.1097/MAT.0b013e3181fcbd86

First Page

26

Last Page

31

Publication Title

ASAIO Journal

Comments

At the time of publication, Richard T. Schoephoerster was affiliated with The University of Texas at El Paso.

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