Tubular medical prosthesis

An implantable vascular graft prosthesis for bridging an aneurysm in an arterial lumen of the body, comprising:

• a tubular wall portion of loosely interlocked knitted loops defining open areas in said tubular wall constructed to prevent excessive bleeding through the wall by inducing an initial clotting when the graft is placed in said lumen and to allow cells to migrate through said wall to endothelialize said graft,
• said wall being formed of at least two separate strands of different materials that are parallel co-knitted to form a unitary wall structure including a first strand that is a metal wire that structurally defines the tubular shape of said prosthesis and maintains said shape when positioned in said lumen and
• a second strand, parallel co-knitted with said first strand, comprising a predetermined non-metallic material selected to extend at least partially into space defined by the knit loops of the first strand to induce said initial clotting while maintaining sufficient open area so cells can migrate through said wall to endothelialize the graft.

An implantable vascular prosthesis for use in an arterial lumen of the body comprising:

• a tubular wall portion of loosely interlocked knitted loops defining open areas in said tubular wall, said wall being formed of at least two separate strands of different materials that are parallel co-knitted to form a unitary wall structure, including a first strand of said loops that is a metal wire that structurally defines the tubular shape of said prosthesis and maintains said shape when positioned in said lumen and
• a second strand, parallel co-knitted with said first strand and comprising a textured textile strand selected to provide enhanced clot-inducing characteristics to the wall of said prosthesis.

An implantable tubular graft prosthesis comprising:

• a tubular wall portion of a loosely interlocked regular pattern of strands defining open areas in said wall constructed to prevent excessive bleeding through the wall by inducing an initial clotting when the graft is placed in said lumen and to allow cells to migrate through said wall to endothelialize said graft,
• said wall being formed of at least two separate strands of different materials that are integrated in parallel in said pattern to form a unitary wall structure, including a first strand that is a metal wire that structurally defines the tubular shape of said prosthesis and maintains said shape when positioned in said lumen, and
• a second strand, in parallel extension and integrated with said first strand as part of said pattern forming said wall, said second strand formed of a material selected to extend at least partially into space defined by the first strand to induce said initial clotting while maintaining sufficient open area so said cells can migrate through said wall to endothelialize said graft.