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Cryopreservation of porcine urethral tissue: storage at − 20◦C preserves the mechanical, failure and geometrical properties

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dc.contributor.author Cunnane, Connor V.
dc.contributor.author Croghan, Stephanie M.
dc.contributor.author Walsh, Michael T.
dc.contributor.author Cunnane, Eoghan M.
dc.contributor.author Davis, Niall Francis
dc.contributor.author Flood, Hugh D.
dc.contributor.author Mulvihill, John J.E.
dc.date.accessioned 2021-05-21T11:53:21Z
dc.date.available 2021-05-21T11:53:21Z
dc.date.issued 2021
dc.identifier.uri http://hdl.handle.net/10344/10101
dc.description peer-reviewed en_US
dc.description.abstract Cryopreservation is required to preserve the native properties of tissue for prolonged periods of time. In this study, we evaluate the impact that 4 different cryopreservation protocols have on porcine urethral tissue, to identify a protocol that best preserves the native properties of the tissue. The cryopreservation protocols include storage in cryoprotective agents at − 20 ◦C and − 80 ◦C with a slow, gradual, and fast reduction in temperature. To evaluate the effects of cryopreservation, the tissue is mechanically characterised in uniaxial tension and the mechanical properties, failure mechanics, and tissue dimensions are compared fresh and following cryopreservation. The mechanical response of the tissue is altered following cryopreservation, yet the elastic modulus from the high stress, linear region of the Cauchy stress – stretch curves is unaffected by the freezing process. To further investigate the change in mechanical response following cryopreservation, the stretch at different tensile stress values was evaluated, which revealed that storage at − 20 ◦C is the only protocol that does not significantly alter the mechanical properties of the tissue compared to the fresh samples. Conversely, the ultimate tensile strength and the stretch at failure were relatively unaffected by the freezing process, regardless of the cryopreservation protocol. However, there were alterations to the tissue dimensions following cryopreservation that were significantly different from the fresh samples for the tissue stored at − 80 ◦C. Therefore, any study intent on preserving the mechanical, failure, and geometric properties of urethral tissue during cryopreservation should do so by freezing samples at − 20 ◦C, as storage at − 80 ◦C is shown here to significantly alter the tissue properties. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Journal of the Mechanical Behavior of Biomedical Materials;119, 104516
dc.relation.uri https://doi.org/10.1016/j.jmbbm.2021.104516
dc.subject soft biological tissue en_US
dc.subject mechanical characterisation en_US
dc.subject urology en_US
dc.subject urethral catheterisation en_US
dc.subject urethra properties en_US
dc.subject urethral trauma en_US
dc.title Cryopreservation of porcine urethral tissue: storage at − 20◦C preserves the mechanical, failure and geometrical properties en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.jmbbm.2021.104516
dc.contributor.sponsor EI en_US
dc.relation.projectid IP-2019-0798 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US


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