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Related Experiment Videos

Structural changes arising from different thawing protocols on cryopreserved human allograft's aortic valve leaflets.

Robert Novotný1,2,3, Dáša Slížová4, Jaroslav Hlubocký1,2

  • 12nd Department of Cardiovascular Surgery, General University Hospital, Prague, Czech Republic.

Advances in Clinical and Experimental Medicine : Official Organ Wroclaw Medical University
|July 6, 2018
PubMed
Summary

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Thawing cryopreserved aortic valve leaflets at room temperature or 37°C causes similar endothelial damage. Both methods resulted in loss of endothelial covering, with a higher incidence of basal membrane damage at 37°C.

Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Cardiovascular Research

Background:

  • Cryopreserved aortic root allografts (CARAs) are used in cardiovascular surgery.
  • Understanding the impact of thawing protocols on CARA integrity is crucial for clinical application.

Purpose of the Study:

  • To evaluate the morphological changes in human aortic valve (AV) leaflets after different thawing protocols.
  • To compare the effects of room temperature (23°C) versus 37°C water bath thawing on AV leaflet structure.

Main Methods:

  • Human aortic valve leaflets were obtained from CARAs.
  • Two thawing protocols were applied: 23°C room temperature and 37°C water bath.
  • Morphological analysis was performed using scanning electron microscopy after sample preparation.
Keywords:
allograftaortic valvecryopreservedstructural changesthawing

Related Experiment Videos

Main Results:

  • Thawing at 23°C resulted in endothelial covering loss in 100% of samples, with no basal lamina damage.
  • Thawing at 37°C caused endothelial covering loss in 83% of samples and basal lamina damage in 17% of samples.
  • Both protocols led to similar structural changes, primarily endothelial damage.

Conclusions:

  • Cryopreserved AV leaflet allografts exhibit comparable structural changes regardless of thawing rate.
  • Thawing protocols impact the endothelial layer of AV leaflets, with a potential for increased basal membrane damage at higher temperatures.