Circumferentially constraining sutures for a stent-graft

摘要

A circumferentially constraining suture for an endovascular prosthesis having a tubular body and a plurality of stents coupled to the tubular body includes a first thread coupled at a first end to one of the stents and a first thread loop disposed opposite the first end. The first thread extends only partially around a circumference of the tubular body in a radially expanded configuration. A second thread having a second thread loop is interlocked with the first thread loop and extends from the first thread loop around a remainder of the circumference of the tubular body. Pulling the second thread causes the first thread to circumferentially constrain the tubular body to a reduced diameter configuration. A trigger wire inserted through the first thread loop retains the first thread such that the tubular body is in the reduced diameter configuration after removal of the second thread.

主权项

1. An endovascular prosthesis comprising:
a tubular body of a graft material, the tubular body defining a lumen therethrough; a stent coupled to the tubular body; at least one circumferentially constraining suture configured as a loop; and a trigger wire extending longitudinally along the tubular body, wherein in a reduced diameter configuration a first end of the loop is attached to the stent, the loop extends only in a first direction from the first end circumferentially around a complete circumference of the tubular body to a second end of the loop disposed opposite the first end, wherein the second end of the loop is coupled to the trigger wire, and wherein in a deployed configuration the trigger wire is disengaged from the second end of the loop such that the stent radially expands and the loop extends only partially around the circumference of the tubular body.