Systems and methods for guidewire crossover for bifurcated prostheses

1. An endovascular delivery system, comprising:

an elongate outer tubular sheath;

an elongate crossover guidewire slidably disposed within the elongate outer tubular sheath;

a crossover guidewire lumen extending over at least a portion of the elongate crossover guidewire,

wherein a distal portion of the crossover guidewire lumen is releasably secured within the elongate outer tubular sheath via a tether and a release wire,

wherein the elongate crossover guidewire is configured to be placed in a lumen of a bifurcated prosthesis, and

wherein the tether is distinct from the crossover guidewire.

2. The system of claim 1 , wherein the tether is joined to a distal portion of the crossover guidewire lumen.

3. The system of claim 1 , wherein the tether is integrally formed from or with the crossover guidewire lumen.

4. The system of claim 1 , wherein the tether is releasably secured to a securement member via the release wire.

5. The system of claim 4 , further comprising a main guidewire slidably disposed within a main guidewire lumen, wherein the securement member is disposed over a proximal portion of the main guidewire lumen.

6. The system of claim 1 , wherein the release wire is routed through a hole in the end of the tether.

7. An endovascular delivery system, comprising:

an elongate outer tubular sheath;

an elongate crossover guidewire slidably disposed within the elongate outer tubular sheath;

a crossover guidewire lumen extending over at least a portion of the elongate crossover guidewire; and

a bifurcated prosthesis comprising an ipsilateral graft leg and a contralateral graft leg, the bifurcated prosthesis being releasably secured within the elongate outer tubular sheath,

wherein the crossover guidewire lumen extends through the ipsilateral graft leg and the contralateral graft leg,

wherein a distal portion of the crossover guidewire lumen is releasably secured within the elongate outer tubular sheath via a non-tubular member, and

wherein the non-tubular member is distinct from the crossover guidewire.

8. The system of claim 7 , wherein the non-tubular member includes at least one of a tether and a release wire.

9. The system of claim 7 , wherein a proximal portion of the crossover guidewire lumen is disposed proximally before the ipsilateral graft leg, a medial portion of the crossover guidewire lumen is disposed within the ipsilateral graft leg, and a distal portion of the crossover guidewire lumen is disposed beyond the contralateral graft leg.

10. The system of claim 7 , wherein a distal portion of the elongate crossover guidewire has a curved end.

11. The system of claim 10 , wherein the curved end is in the shape of a shepherd's hook.

12. The system of claim 7 , wherein a distal portion of the elongate crossover guidewire is configured to engage another guidewire.

13. The system of claim 7 , further comprising a main guidewire slidably disposed within a main guidewire lumen, wherein the main guidewire lumen extends through the ipsilateral graft leg and a main graft body of the bifurcated prosthesis.

14. The system of claim 7 , wherein a distal portion of the elongate crossover guidewire is disposed beyond an open end of a tubular portion of the crossover guidewire lumen.

15. The system of claim 7 , wherein a distal portion of the elongate crossover guidewire is configured to be advanced beyond an open end of a tubular portion of the crossover guidewire lumen in a cross-over maneuver.

16. The system of claim 7 , wherein the prosthesis has a flap at the ipsilateral graft leg, the flap containing at least one hole.

17. The system of claim 16 , wherein the ipsilateral graft leg is releasably secured to a distal stop on a delivery guidewire, the distal stop having at least one projection disposed in the at least one hole.

18. An endovascular delivery system, comprising:

an elongate outer tubular sheath;

an elongate crossover guidewire slidably disposed within the elongate outer tubular sheath;

a crossover guidewire lumen extending over at least a portion of the elongate crossover guidewire; and

a bifurcated prosthesis comprising a main tubular body, an ipsilateral graft leg, and a contralateral graft leg, the bifurcated prosthesis being releasably secured within the elongate outer tubular sheath,

wherein the crossover guidewire lumen extends through the ipsilateral graft leg and the contralateral graft leg, and

wherein a distal portion of the crossover guidewire lumen is releasably secured within the elongate outer tubular sheath via a tether, and

wherein the tether is distinct from the crossover guidewire.

19. The system of claim 18 , further comprising a main guidewire slidably disposed within a main guidewire lumen, wherein the main guidewire lumen extends through an ipsilateral graft leg and the main graft body.

20. The system of claim 18 , wherein the main tubular body, the ipsilateral graft leg, and the contralateral graft leg include inflatable channels.