Three-layer vascular prostheses
First Claim
1. An implantable three-layer vascular prosthesis comprising:
- a tanned, physically self-supporting, physiologically resorbable internal layer (1),a physiologically non-resorbable, porous middle layer (2),a tanned, physically self-supporting, physiologically resorbable external layer (3),wherein the internal layer and the external layer are made from a biological material and the tanning of the internal layer is to a greater extent than the tanning of the external layer whereby the external layer is resorbed faster than the internal layer after implantation into an organism.
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Abstract
The invention relates to three-layer vascular prostheses comprising an internal layer 1, a middle layer 2 and an external layer 3 which is characterized in that the middle layer 2 is made from a physiologically non-resorbable, porous material, and the internal layer 1 and the external layer 3 are self-supporting and are made from a physiologically resorbable, fibrillar material, and are tanned. The internal layer 1 and the external layer 3 preferably consist of collagen, but have different resorbability. The middle layer 2 is preferably made from inert fibers, preferably synthetic fibers, by means of textile technology. The biologically resorbable layers preferably comprise chemically or physically bonded or incorporated pharmacologically active substances.
169 Citations
22 Claims
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1. An implantable three-layer vascular prosthesis comprising:
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a tanned, physically self-supporting, physiologically resorbable internal layer (1), a physiologically non-resorbable, porous middle layer (2), a tanned, physically self-supporting, physiologically resorbable external layer (3), wherein the internal layer and the external layer are made from a biological material and the tanning of the internal layer is to a greater extent than the tanning of the external layer whereby the external layer is resorbed faster than the internal layer after implantation into an organism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for manufacturing the prosthesis according to claim 25, comprising the following steps:
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(A) Preparing a self-supporting internal layer (1) from a physiologically resorbable fibrillar material, (B) tanning the internal layer (1) by means of a biologically acceptable tanning agent to reduce swelling capacity, (C) providing a middle layer (2) by applying a layer of a physiologically non-resorbable, porous material onto the internal layer (1), (D) providing an external layer (3) by applying a self-supporting layer of a physiologically resorbable fibrillar material onto the middle layer (2), and (E) tanning the external layer (3) by means of a biologically acceptable tanning agent to reduce swelling capacity. - View Dependent Claims (21, 22)
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Specification