Bifurcated intraluminal prostheses construction and methods

An endoluminal support device comprising:

• a radially-expandable, bifurcated support, including
• a first support portion, and
• a second support portion with a peanut-shaped cross-section and including a first lobe and a second lobe, and a longitudinal isthmus between the first lobe and the second lobe,
• the first and second lobes having smaller diameters than the first support portion;
• wherein the endoluminal support device has an uninterrupted cross-section over its entire length,
• wherein the radially-expandable, bifurcated support is formed of independent ring members that are attached to each other by stitching.

An endoluminal support device comprising:

• a plurality of independent, expandable ring members forming a bifurcated vascular support structure,
• the bifurcated vascular support structure having a first longitudinally-oriented portion with a generally circular cross-section and a second portion with at least one longitudinal indentation and a peanut-shaped cross-section and,
• wherein the endoluminal support device has an uninterrupted cross-section over its entire length, and
• wherein the ring members are self-expanding, and attached to each other by stitching.

A branching endovascular prosthesis comprising:

• a radially expandable support, the support including
• a first expandable circumferential support portion, and
• a second support portion with a peanut-shaped cross-section and including a first lobe and a second lobe separated from the first lobe by an isthmus,
• wherein the branching endovascular prosthesis has an uninterrupted cross-section over its entire length,
• wherein the radially expandable support is formed of a plurality of independent ring members that are attached to each other by stitching.

A branching endovascular prosthesis comprising:

• a distal support portion comprising at least one radially expandable portion;
• and
• a proximal support portion coupled to the distal support portion,
• the proximal support portion having a peanut-shaped cross-section and including a first radially expandable lobe and a second radially expandable lobe separated from the first lobe by an isthmus,
• wherein the branching endovascular prosthesis has an uninterrupted cross-section over its entire length,
• wherein the branching endovascular prosthesis is formed of a plurality of independent, self-expanding ring members, and
• wherein the ring members are attached to each other by stitching.

An endoluminal support device comprising:

• a plurality of independent ring members forming an expandable bifurcated vascular support structure having a peanut-shaped cross-section at one end,
• each ring member having a circumferentially repeating diamond pattern, and
• the bifurcated vascular support structure having an uninterrupted cross-section over its entire length,
• wherein the ring members are self-expanding and attached to each other by stitching.