Bifurcated side-access intravascular stent graft

A bifurcated stent graft comprising:

• one or more stents;
• a primary graft coupled to the one or more stents having a first end and a second end forming a primary fluid flow channel;
• and
• one or more external graft channels formed by graft material coupled to an outer surface of the primary graft configured to communicate with the primary fluid flow channel through a side opening in the primary graft, the one or more external graft channels including an end at least partially opening in a common direction with the first end or the second end of the primary graft configured to accept a branch member and connect the branch member to the primary fluid flow channel through the side opening in the primary graft.

An endoprosthesis for repair of a damaged portion of an aorta, the endoprosthesis comprising:

• a primary graft coupled to the a first stent at a first end of the primary graft and a second stent arranged at a second end of the primary graft, the primary graft having an outer surface configured to engage a tissue wall of the aorta and an inner surface configured to define a primary fluid flow lumen between the first end and the second end, the primary graft having a side opening into the primary flow lumen between the first end and the second end;
• and
• an external graft channel extending along the outer surface of the primary graft, defining an external fluid flow channel communicating with the primary fluid flow channel through the side opening in the primary graft extending substantially in a common longitudinal direction as the primary flow lumen, the secondary graft including an end section at least partially opening in a common direction with the first end or the second end of the primary graft;
• and
• a branch member having a branch fluid flow channel configured to engage the end section of the external graft channel and to connect the branch fluid flow channel of the branch member to the primary fluid flow channel of the primary graft member through the side opening in the primary graft.

A method of deploying a stent graft within a vessel, the method comprising:

• arranging an endoprosthesis within the vessel, the endoprosthesis including a primary stent construct, a primary graft coupled to the primary stent construct, the primary graft extending between a first end and a second end, the primary graft having an outer surface and an inner surface, the inner surface of the primary graft defining a primary fluid flow channel between the first end and the second end, the primary graft having a side opening into the primary flow channel between the first end and the second end, and a secondary graft coupled lengthwise along an outer surface of the primary graft, the secondary graft defining an external graft channel extending along the outer surface of the primary graft such that the primary graft channel and the external graft channel extend in a common longitudinal direction, the external graft channel defining an external fluid flow channel communicating with the primary fluid flow channel through the side opening in the primary graft, the secondary graft including an end at least partially opening in a common direction with the first end or the second end of the primary graft;
• and
• engaging a first end portion of a branch member with the end of the secondary graft, the branch member having a branch fluid flow channel to connect the branch fluid flow channel of the branch member to the primary fluid flow channel of the primary graft member through the side opening in the primary graft;
• and
• arranging a second end portion of the branch member within a branch vessel extending from the vessel.