Method of manufacturing pliable biological grafts materials
First Claim
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1. A method of preparing a flexible collagenous biological graft material comprising a network of collagen fibers, said method comprising the step of:
- (a) longitudinally compressing the network of collagen fibers while exposing the collagen fibers to a collagen cross-linking reagent.
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Abstract
Preparing chemically cross-linked collagenous biological graft material by preparation processes which include the step of altering the locations and/or orientations of chemical cross-linkages formed during the collagen cross-linking process. Embodiments of the method include various processes whereby physical force, stress or movement is applied to alter the relative positioning of the collagen fibers within the graft materials during at least the initial period of exposure to the collagen cross-linking reagent.
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8 Claims
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1. A method of preparing a flexible collagenous biological graft material comprising a network of collagen fibers, said method comprising the step of:
(a) longitudinally compressing the network of collagen fibers while exposing the collagen fibers to a collagen cross-linking reagent. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A collagenous biological vascular graft prepared by a method which comprises the steps of:
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(a) harvesting a segment of blood vessel having a luminal surface and a network of collagen fibers from a mammalian source; (b) placing the segment of blood vessel on a cylindrical support member having an outer surface such that the luminal surface of the blood vessel is in contact with the outer surface of the cylindrical support member; (c) longitudinally compressing the segment of blood vessel to a compressed length so that the segment of blood vessel is shortened by an amount equal to 1% to 50% of its original relaxed length; (d) immersing the longitudinally compressed segment of blood vessel in a collagen cross-linking reagent for a period of time sufficient to achieve adequate cross-linking of the collagen fibers contained in the segment of blood vessel; (e) removing the segment of blood vessel from the collagen cross-linking reagent; (f) releasing the segment of blood vessel from said longitudinally compressed state and removing the segment of blood vessel from the outer surface of said cylindrical support member. - View Dependent Claims (8)
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Specification