Vascular grafts with cross-weave patterns
First Claim
1. A vascular graft prosthesis comprising a tube formed of fabric insertable into the vascular system for the conveyance of blood therethrough, the fabric being a weave having a plurality of warp threads running the longitudinal direction and weft thread means running the circumferential direction, at least a portion of said warp threads at substantially regular intervals comprising pairs of warp threads that cross over each other with said weft thread means running between cross-over points of said crossed warp thread pairs, said weft thread means being restrained at each passage between said cross-over points against axial displacement, preventing unravelling of said weft thread means at ends of said prosthesis, the fabric being woven of a low porosity to promote retention of blood within said fabric prosthesis.
5 Assignments
0 Petitions
Accused Products
Abstract
Graft prostheses are woven with cross-weave patterns to prevent unravelling and to increase suture hold strength. A vascular graft according to the invention is woven as a continuous tube by shuttling a continuous weft thread through a double-layer array of warp threads. As the weft thread is shuttled through the warp pattern, groups of warp threads are retained in parallel relationship to each other while interspersed pairs of warp threads are crossed over each other. This results in graft having normal weave patterns circumferentially alternating with cross-weave patterns.
192 Citations
21 Claims
- 1. A vascular graft prosthesis comprising a tube formed of fabric insertable into the vascular system for the conveyance of blood therethrough, the fabric being a weave having a plurality of warp threads running the longitudinal direction and weft thread means running the circumferential direction, at least a portion of said warp threads at substantially regular intervals comprising pairs of warp threads that cross over each other with said weft thread means running between cross-over points of said crossed warp thread pairs, said weft thread means being restrained at each passage between said cross-over points against axial displacement, preventing unravelling of said weft thread means at ends of said prosthesis, the fabric being woven of a low porosity to promote retention of blood within said fabric prosthesis.
- 14. A fabric adapted for use in a prosthesis for implanation into a living body, the fabric being a weave having a plurality of warp threads in one direction and weft thread means running in a generally perpendicular direction, pairs of warp threads that cross over each other with said weft threads means running between cross-over points of said crossed warp thread pairs and between about one and about twenty straight parallel warp threads interspersed between adjacent pairs of crossed warp threads with said weft thread means forming a normal weave pattern with said parallel warp threads, said weft thread means being restrained at each passage between said cross-over points from displacement in the running direction of said warp threads, preventing unravelling of said weft thread means at the ends of said warp threads.
- 19. A vascular graft prosthesis comprising a tube formed of fabric insertable into the vascular system for the conveyance of blood therethrough, the fabric being a weave having a plurality of warp threads running the longitudinal direction and weft thread means running the circumferential direction, pairs of warp threads that cross over each other with said weft thread means running between cross-over points of said crossed warp thread pairs, and between about one and about twenty straight parallel warp threads circumferentially interspersed between adjacent pairs of said crossed warp threads with said weft thread means forming a normal weave pattern with said parallel warp threads, said weft thread means being restrained at each passage between said cross-over points from axial displacement, preventing unravelling of said weft thread means at ends of said prosthesis, the fabric being woven of a low porosity to promote retention of blood with said fabric prosthesis.
Specification