Systems and methods for deploying a luminal prosthesis over a carina
A system for deploying a prosthesis over a Carina between an ipsilateral lumen and a contralateral lumen includes a guidewire, a guidewire capture catheter, a self-expanding tubular prosthesis, and a delivery catheter. The guidewire is first placed in the ipsilateral lumen. The guidewire capture catheter is then advanced from the contralateral lumen to a position at or above the ipsilateral lumen. The guidewire is typically advanced through an occlusion, which may be a total occlusion, and captured by a capture element on the guidewire capture catheter. The guidewire capture catheter pulls the guidewire out through the contralateral side, and the guidewire is used to advance a delivery catheter from the ipsilateral side. The delivery catheter delivers a first segment of the tubular prosthesis in the ipsilateral lumen and a second segment of the prosthesis in the contralateral lumen.
1. A method for deploying a luminal prosthesis over a carina between an ipsilateral lumen and a contralateral lumen, said method comprising:
placing a guidewire over the carina between the ipsilateral lumen and the contralateral lumen;
advancing over the guidewire a delivery catheter which carries a tubular prosthesis over the carina, wherein the tubular prosthesis is self-expanding and constrained on the delivery catheter by a retractable sheath; and
deploying the prosthesis from the delivery catheter by retracting the sheath relative to the prosthesis and the delivery catheter so that a first segment of the prosthesis is positioned in the ipsilateral lumen and a second segment is positioned in the contralateral lumen;
wherein placing the guidewire comprises advancing the guidewire through subintima past an occlusion in the ipsilateral lumen, over the carina, and into the contralateral lumen.
2. A method as in claim 1 , wherein the ipsilateral lumen is in an ipsilateral iliac artery and the contralateral lumen is a contralateral iliac artery.
3. A method as in claim 2 , wherein the guidewire is placed from an ipsilateral femoral artery to a contralateral femoral artery.
4. A method as in claim 1 , wherein placing the guidewire comprises advancing the guidewire through the ipsilateral lumen, over the carina, and into the contralteral lumen.
5. A method as in claim 1 , further comprising deploying a guidewire capture catheter through the contralateral lumen to position a capture element above an opening of the ipsilateral lumen adjacent the carina, wherein the guidewire exits the subintima into the capture element.
6. A method as in claim 5 , further comprising retracting the guidewire capture catheter to draw the guidewire out through the contralateral lumen.
7. A method as in claim 6 , wherein deploying the capture element comprises expanding the capture element, wherein the capture element is collapsed prior to retracting the guidewire capture catheter.
8. A method as in claim 7 , wherein the capture element comprises a cage which is mechanically expanded.
9. A method as in claim 7 , wherein the capture element comprises a balloon which is inflated.
10. A method as in claim 1 , further comprising deploying a shaped guide catheter over the guidewire, wherein the delivery catheter is advanced through a lumen of the shaped guide catheter over the carina.
11. A method as in claim 1 ,
wherein the tubular prosthesis is self-expanding and is constrained in a low-profile configuration on the delivery catheter.
12. A method as in claim 11 , wherein the tubular prosthesis is constrained by a sheath and deploying the prosthesis comprises retracting the sheath relative to the prosthesis.
13. A method as in claim 1 , wherein deploying the prosthesis further comprises aligning markers on the tubular prosthesis and/or the delivery catheter with patient anatomy to position the first segment in the ipsilateral lumen and the second segment in the contralateral lumen prior to retracting the sheath.
14. A method as in claim 1 , wherein the first and second segments of the tubular prosthesis tent over the carina and open from each other above the carina to define an arcuate path between the ipsilateral and contralateral lumens for subsequent advancement of a guidewire and/or catheter.
15. A method as in claim 14 , wherein the first and second segments of the tubular prosthesis are joined by a hinge region.
16. A method as in claim 14 , wherein the first and second segments of the tubular prosthesis are joined by a tether.
17. A method as in claim 14 , wherein the tubular prosthesis has a side opening between the first and second segments.
18. A method as in claim 14 , wherein the first and second segments are not joined.
19. A method for deploying a luminal prosthesis over a carina between an ipsilateral lumen and a contralateral lumen, said method comprising:
placing a guidewire over the carina between the ipsilateral lumen and the contralateral lumen;
advancing over the guidewire a delivery catheter which carries a tubular prosthesis over the carina, wherein the tubular prosthesis is self-expanding and constrained on the delivery catheter by a retractable sheath; and
deploying the prosthesis from the delivery catheter by retracting the sheath relative to the prosthesis and the delivery catheter so that a first segment of the prosthesis is positioned in the ipsilateral lumen and a second segment is positioned in the contralateral lumen;
wherein retracting the sheath comprises retracting a first length of the sheath in a first direction from over the first segment of the tubular prosthesis and retracting a second length of the sheath in a second direction from over the second segment of the tubular prosthesis.