| 摘要 |
A bifurcated stent graft section includes a plurality of loops formed from a serpentine support wire forming a stent at a distal end of one of the short legs of the bifurcated stent graft section. A delivery system includes a coil having a wire configured to pass through the loops and prevent disengagement of the loops from the delivery system without relative rotational movement between the coil and the loops. In a method for delivery the bifurcated stent graft section, the bifurcated stent graft section is advanced to the treatment site, a sheath is retracted to deploy the proximal end of the bifurcated stent graft section while the coil retains the distal end of one of the short legs of the bifurcated stent graft section. A second guidewire is threaded into the short leg of the bifurcated stent graft section which is been stabilized by being held by the coil of the delivery system. An extension leg graft is delivered over the second guidewire and deployed to be coupled to the other short leg of the bifurcated stent graft section while the coil retains the loops. The coil is rotated to release the loops and allow the bifurcated stent graft section to fully deploy. A second extension leg graft is delivered and coupled to the other leg of the bifurcated stent graft section to complete the construction of a bifurcated stent graft in situ. |
