Stent graft having an internal bidirectional branch

A stent graft comprising:

• a substantially tubular graft of graft material having a proximal end, a distal end, an internal lumen, and a sidewall;
• a lateral opening in the sidewall and having a proximal end, a distal end, a length, a width, and a perimeter;
• an internal bidirectional branch disposed within the lumen at least partially along an inner surface of the substantially tubular graft of graft material and in fluid communication with the lateral opening, the internal bidirectional branch having a proximal end, a proximal end opening, a distal end, a distal end opening, a proximal portion extending from the proximal end of the lateral opening toward the proximal end of the substantially tubular graft and having a diameter, and a distal portion extending from the distal end of the lateral opening toward the distal end of the substantially tubular graft and having a diameter;
• and
• a plurality of stents affixed to a surface of the substantially tubular graft of graft material, the plurality of stents disposed at least partially along a length of the graft to support the shape of the substantially tubular graft of graft material;
• wherein each of the length and width of the lateral opening is greater than the diameters of the proximal and distal portions of the internal branch and define an enlarged recess into the internal branch;
• wherein the substantially tubular graft of graft material has a first configuration wherein the internal branch is disposed externally to the substantially tubular graft of graft material and a second configuration wherein the internal branch is disposed internally of the substantially tubular graft of graft material;
• and
• wherein the internal branch is an integral partitioned segment of the sidewall of the substantially tubular graft.

A stent graft comprising:

• a substantially tubular graft of graft material having a proximal end, a distal end, an internal lumen, and a sidewall;
• an enlarged lateral opening in the sidewall and having a proximal end, a distal end, a length, a width, and a perimeter;
• an internal bidirectional branch disposed within the lumen at least partially along an internal surface of the substantially tubular graft of graft material and in fluid communication with the enlarged lateral opening, the internal bidirectional branch having a proximal end, a proximal end opening, a distal end, a distal end opening, a proximal portion extending from the proximal end of the enlarged lateral opening toward the proximal end of the substantially tubular graft and having a diameter, and a distal portion extending from the distal end of the enlarged lateral opening toward the distal end of the substantially tubular graft and having a diameter;
• and
• a plurality of stents affixed to a surface of the substantially tubular graft of graft material, the plurality of stents disposed at least partially along a length of the graft to support the shape of the substantially tubular graft of graft material;
• wherein each of the length and width of the enlarged lateral opening is greater than the diameters of the proximal and distal portions of the internal branch and together define an enlarged recess into the internal branch,
• wherein the substantially tubular graft of graft material has a first configuration wherein the internal branch is disposed externally to the substantially tubular graft of graft material and a second configuration wherein the internal branch is disposed internally of the substantially tubular graft of graft material;
• and
• wherein the substantially tubular graft and the internal branch are constructed from a single piece of the graft material, wherein the internal branch is an integral partitioned segment of the sidewall of the substantially tubular graft.