Pulse Duplicator Hydrodynamic Testing of Bioengineered Biological Heart Valves

There are many heart valve replacements currently available on the market; however, these devices are not ideal for pediatric patients with congenital heart valve defects. Decellularized valve substitutes offer potential for improved clinical outcomes and require pre-clinical testing guidelines and...

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Bibliographic Details
Published in:Cardiovascular engineering and technology 2016-12, Vol.7 (4), p.352-362
Main Authors: Buse, Eric E., Hilbert, Stephen L., Hopkins, Richard A., Converse, Gabriel L.
Format: Article
Language:English
Subjects:
Animals
Biaxial loads
Bioengineering
Biomedical Engineering and Bioengineering
Biomedicine
Bioprosthesis
Cardiology
Conditioning
Crosslinking
Engineering
Equipment Failure Analysis - methods
Glutaraldehyde
Heart
Heart Valve Prosthesis
Heart valves
Hydrodynamics
Mechanical properties
Modulus of elasticity
Pressure gradients
Reproduction (copying)
Scaffolds
Swine
Tissue Engineering
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Summary:There are many heart valve replacements currently available on the market; however, these devices are not ideal for pediatric patients with congenital heart valve defects. Decellularized valve substitutes offer potential for improved clinical outcomes and require pre-clinical testing guidelines and testing systems suitable for non-crosslinked, biological heart valves. The objective of this study was to assess the hydrodynamic performance of intact, bioengineered pulmonary valves using a custom pulse duplicator capable of testing intact biological valved conduits. The mechanical behavior of valve associated sinus and arterial tissue was also evaluated under biaxial loading. Cryopreserved, decellularized, extracellular matrix (ECM) conditioned and glutaraldehyde fixed valves showed reduced pressure gradients and increased effective orifice area for decellularized and ECM conditioned valves. ECM conditioning resulted in increased elastic modulus but decreased stretch in circumferential and longitudinal directions under biaxial loading. Overall, decellularization and ECM conditioning did not compromise the scaffolds, which exhibited satisfactory bench top performance.
ISSN:1869-408X
1869-4098
DOI:10.1007/s13239-016-0275-9