Improved blood contact surfaces employing natural...

A - Human Necessities – 61 – L

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A61L 27/00 (2006.01) A61L 27/50 (2006.01) A61L 33/00 (2006.01)

Patent

CA 2186374

This invention relates to improved vascular prostheses derived from mammalian blood ves- sels. The prostheses are fabricated from arterial segments from which the donor endothelium has been removed. A key aspect of this invention is the preservation of the subendothelial extracellu- lar matrix that will serve as the blood interface of the vascular prostheses. The vessel segments are treated to reduce the likelihood of calcification and fixed with a tissue preservative. This invention results in vascular prostheses that are particularly useful for small diameter applications, such as ar- terial replacement requiring a diameter of 6 mm or less.

L'invention concerne des prothèses vasculaires améliorées dérivées de vaisseaux sanguins de mammifères. Ces prothèses sont fabriquées à partir de segments artériels desquels l'endothélium des donneurs a été enlevé. Un aspect majeur de la présente invention est la préservation de la matrice extracellulaire sous-endothéliale qui servira d'interface avec le sang pour les prothèses vasculaires. Les segments de vaisseaux sont traités pour réduire le risque de calcification et fixés avec un agent de préservation de tissus. La présente invention se traduit par des prothèses vasculaires qui sont particulièrement utiles pour des applications de faible diamètre, tels que le remplacement d'artères nécessitant un diamètre inférieur ou égal à 6 mm.

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