Stent graft having extended landing area and method for using the same

A medical device for treating a target site within a lumen having an arcuate portion and at least one branch lumen extending therefrom, said medical device comprising:

• a first tubular portion comprising a proximal end and a distal end, said first tubular portion formed of a continuous tube between the proximal and distal ends thereof, wherein the first tubular portion is self-expanding;
• a second tubular portion comprising a proximal end and a distal end, said second tubular portion formed of a continuous tube between the proximal and distal ends thereof, wherein the second tubular portion is self-expanding;
• and
• a resilient linking portion extending from the distal end of said first tubular portion to the proximal end of said second tubular portion thereby coupling said first and second tubular portions, the resilient linking portion consisting of a shape-memory material and comprising a preset, memorized arcuate configuration extending along, and biased towards, an arcuate axis in a relaxed state and configured to conform to at least a portion of the arcuate portion of the lumen, the resilient linking portion configured to be deflected away from the arcuate axis for delivery to the target site within a catheter and biased such that the resilient linking portion is configured to at least partially return to its preset, memorized arcuate configuration upon being deployed from the catheter at the target site;
• and
• an opening extending from the distal end of said first tubular portion to the proximal end of said second tubular portion, a central axis extending from the proximal end of said first tubular portion, through the opening, and to the distal end of said second tubular portion, wherein a length of the resilient linking portion from the distal end of said first tubular portion to the proximal end of said second tubular portion is less than a length of the opening taken about the central axis from the distal end of said first tubular portion to the proximal end of said second tubular portion, and wherein said opening is configured to align with the at least one branch lumen and facilitate fluid flow between the at least one branch lumen and the arcuate portion of the lumen.

A medical device for treating a target site within a lumen having an arcuate portion and at least one branch lumen extending therefrom, said medical device comprising:

• a first tubular portion comprising a proximal end and a distal end, said first tubular portion formed of a continuous tube between the proximal and distal ends thereof, wherein the first tubular portion is self-expandable;
• a second tubular portion comprising a proximal end and a distal end, said second tubular portion formed of a continuous tube between the proximal and distal ends thereof, wherein the second tubular portion is self-expandable;
• and
• a resilient linking portion extending from the distal end of said first tubular portion to the proximal end of said second tubular portion thereby coupling said first and second tubular portions, the resilient linking portion comprising a preset, heat set, memorized arcuate configuration configured to conform to at least a portion of the arcuate portion of the lumen, the resilient linking portion configured to at least partially return to its preset, heat set, memorized arcuate configuration upon being deployed at the target site;
• and
• an opening extending from the distal end of said first tubular portion to the proximal end of said second tubular portion, a central axis extending from the proximal end of said first tubular portion, through the opening, and to the distal end of said second tubular portion, wherein a length of the resilient linking from the distal end of said first tubular portion to the proximal end of said second tubular portion is less than a length of the opening taken about the central axis from the distal end of said first tubular portion to the proximal end of said second tubular portion, and wherein said opening is configured to align with the at least one branch lumen and facilitate fluid flow between the at least one branch lumen and the arcuate portion of the lumen.