Preloaded branch wire loop constraint

1. An endoluminal prosthesis assembly comprising

a delivery system having an introduction end, an operator end, and a stent graft retention region;

an endoluminal prosthesis disposed at the stent graft retention region, the prosthesis comprising a tubular body, an inner lumen extending between proximal and distal ends of the tubular body, a proximal opening at the proximal end, a distal opening at the distal end, at least one fenestration disposed in a sidewall of the tubular body between the proximal and distal ends, and an internal branch at least partially formed with the sidewall of the tubular body and disposed in parallel alignment with the prosthesis, wherein the proximal end of the tubular body is toward the introduction end and the distal end of the tubular body is toward the operator end; and

a guide wire pre-loaded with the prosthesis in the delivery system and configured to receive an auxiliary catheter moveable over the guide wire, at least a portion of the guide wire between a first end and a second end disposed within the internal branch and the inner lumen of the prosthesis prior to delivery of the prosthesis and during delivery and deployment of the prosthesis, the second end of the guide wire extending distally from the distal opening of the tubular body, the first end of the guide wire extending through the internal branch and the at least one fenestration such that a portion of the guide wire is externally disposed relative to the prosthesis, wherein the externally disposed portion of the guide wire is bent back on itself to form an externally disposed loop extending proximally away from the at least one fenestration, and wherein after forming the loop, the first end of the guide wire re-entering the tubular body of the prosthesis such that the first end of the guide wire is disposed internally relative to the prosthesis, and

wherein the loop provides a hard stop for the auxiliary catheter.

2. The assembly of claim 1 , wherein the first end of the guide wire is attached by a releasable fastening device to an interior surface of the tubular body during delivery and deployment of the prosthesis.

3. The assembly of claim 2 , wherein the releasable fastening device is a suture.

4. The assembly of claim 1 , wherein the first end of the guide wire re-enters the tubular body of the prosthesis through the proximal opening of the tubular body.

5. The assembly of claim 1 , wherein the first end of the guide wire re-enters the tubular body of the prosthesis through the at least one fenestration from which it exited.

6. The assembly of claim 1 , wherein the at least one fenestration comprises two or more fenestrations.

7. The assembly of claim 1 , wherein the loop has a length of about 3 cm to about 6 cm.

8. The assembly of claim 1 , wherein the loop has a length greater than 3 cm and less than 8 cm.

9. The assembly of claim 1 , wherein the guide wire comprises nitinol.

10. An endoluminal prosthesis assembly comprising

a delivery system having an introduction end, an operator end, and a stent graft retention region;

an endoluminal prosthesis disposed at the stent graft retention region, the prosthesis comprising a tubular body, an inner lumen extending between proximal and distal ends of the tubular body, at least one fenestration disposed in a sidewall of the tubular body between the proximal and distal ends, and an internal branch at least partially formed with the sidewall of the tubular body and disposed in parallel alignment with the prosthesis, wherein the proximal end of the tubular body is toward the introduction end and the distal end of the tubular body is toward the operator end; and

a guide wire pre-loaded with the prosthesis in the delivery system and configured to receive an auxiliary catheter moveable over the guide wire, at least a portion of the guide wire between a first end and a second end disposed within the internal branch and the inner lumen of tubular body of the prosthesis prior to delivery of the prosthesis and during delivery and deployment of the prosthesis, the second end of the guide wire extending distally from the distal opening of the tubular body, the first end of the guide wire extending through the internal branch and the at least one fenestration such that a portion of the guide wire is externally disposed relative to the prosthesis, wherein the externally disposed portion of the guide wire is bent back on itself to form an externally disposed loop extending proximally away from the at least one fenestration, and wherein after forming the loop, the first end of the guide wire extends in a distal direction, externally relative to the prosthesis, and

wherein the loop provides a hard stop for the auxiliary catheter.

11. The assembly of claim 10 , wherein the first end of the guide wire is attached by a releasable fastening device to an exterior surface of the tubular body of the prosthesis during delivery and deployment of the prosthesis.

12. The assembly of claim 10 , wherein the first end of the guide wire extends in a distal direction along the length of the prosthesis terminating at the user end of the device.

13. The assembly of claim 10 , wherein the at least one fenestration comprises two or more fenestrations.

14. The assembly of claim 10 , wherein the first end of the guide wire is attached by a releasable fastening device to a surface of the tubular body during delivery and deployment of the prosthesis.

15. The assembly of claim 10 , wherein the loop has a length of about 3 cm to about 6 cm.

16. The assembly of claim 10 , wherein the loop has a length greater than 3 cm and less than 8 cm.