In-vitro investigation of endothelial monolayer retention on an inflow VAD cannula inside a beating heart phantom
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Date
2023-09
Publication Type
Journal Article
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Abstract
Ventricular assist devices (VADs) provide an alternative solution to heart transplantation for patients with end-stage heart failure. Insufficient hemocompatibility of VAD components can result in severe adverse events, such as thromboembolic stroke, and readmissions. To enhance VAD hemocompatibility, and avoid thrombus formation, surface modification techniques and endothelialization strategies are employed.
In this work, a free form patterning topography is selected to facilitate the endothelialization of the outer surface of the inflow cannula (IC) of a commercial VAD. An endothelialization protocol for convoluted surfaces such as the IC is produced, and the retainment of the endothelial cell (EC) monolayer is evaluated. To allow this evaluation, a dedicated experimental setup is developed to simulate realistic flow phenomena inside an artificial, beating heart phantom with a VAD implanted on its apex. The procedural steps of mounting the system result to the impairment of the EC monolayer, which is further compromised by the developed flow and pressure conditions, as well as by the contact with the moving inner structures of the heart phantom. Importantly, the EC monolayer is better maintained in the lower part of the IC, which is more susceptible to thrombus formation and may therefore aid in minimizing the hemocompatibility related adverse events after the VAD implantation.
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published
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Journal / series
Volume
152
Pages / Article No.
213485
Publisher
Elsevier
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Subject
Ventricular assist device; Endothelialization; Endothelial monolayer; Thrombosis; Heart phantom; Dynamic testing
Organisational unit
03462 - Poulikakos, Dimos (emeritus) / Poulikakos, Dimos (emeritus)
09563 - Zeilinger, Melanie / Zeilinger, Melanie
03943 - Meboldt, Mirko / Meboldt, Mirko
03605 - Mazza, Edoardo / Mazza, Edoardo
09667 - Falk, Volkmar (ehemalig) / Falk, Volkmar (former)
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Related publications and datasets
Is supplemented by: https://doi.org/10.3929/ethz-b-000729900