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Etude expérimentale sur le comportement mécanique des artères congelées à basses températures.

An experimental study of the mechanical behaviour of frozen arteries at low temperatures.

Auteurs : ZHANG A., CHENG S., LEI D., et al.

Type d'article : Article

Résumé

The authors present an experimental study of the mechanical response of frozen arteries to tensile stresses at low temperatures. A dynamic mechanical analyser was used to perform the mechanical experiments. It was found that the frozen artery shows a kind of elastic-plasticity when the temperature is between -20 °C and -40°C, and with a decrease in the temperature, the plasticity deformation decreases. Thus, at a temperature of -120 °C, no plasticity deformation is observed before the artery's fracture and the tissue shows perfect elastic brittleness, both peripherally and axially. These mechanical characteristics help explain the fracture phenomena occurring during cryopreservation of arteries. The mechanical properties, including elastic modulus and fracture strength, are also given. It is known that a cryoprotectant used in cryopreservation is necessary in order to maintain the tissue's biological functions. This investigation of its effect on the artery's mechanical properties found that the presence of a cryoprotectant can soften the tissue at low temperatures, thus perhaps decreasing the possibility of fractures during cryopreservation.

Détails

  • Titre original : An experimental study of the mechanical behaviour of frozen arteries at low temperatures.
  • Identifiant de la fiche : 2003-3023
  • Langues : Anglais
  • Source : CryoLetters - vol. 23 - n. 6
  • Date d'édition : 11/2002
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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