Apparatus and method for deploying an implantable device within the body
The present invention provides systems and methods for deploying implantable devices within the body. The delivery and deployment systems include at least one catheter or an assembly of catheters for selectively positioning the lumens of the implant to within target vessels. Various deployment and attachment mechanisms are provided for selectively deploying the implants.
1. A method of implanting a device at a target site within a main vessel and at least one side branch vessel, the device comprising a main lumen and at least one branched lumen extending laterally therefrom, the method comprising:
advancing the device using a catheter system wherein each of a proximal end and distal end of the main lumen and a distal end of the at least one branched lumen is releasably attached to the catheter system;
advancing the distal end of the main lumen from a distal end of the catheter system wherein the distal end of the main lumen remains releasably attached to the system;
advancing the distal end of the at least one branched lumen into the side branch vessel independently of advancing the distal end of the main lumen while the distal end of the at least one branched lumen remains releasably attached to the catheter system;
applying tension to the distal end of the at least one branched lumen to elongate the at least one branched lumen when the at least one branched lumen is within the at least one side branch vessel;
controlling the tension applied to the distal end of the at least one branched lumen, independently of the main lumen, to expand the branched lumen into a partial deployed position prior to releasing the distal end of the at least one branched lumen from the catheter system; and
detaching at least one of the main lumen or branched lumen from the catheter system.
2. The method of claim 1 wherein the advanced distal ends are retractable to within the system prior to detachment from the system.
3. The method of claim 1 wherein at least one distal end of the device is releasably attached to the catheter system by a spring-loaded mechanism.
4. The method of claim 3 wherein the spring-loaded mechanism comprises a plurality of extensions and a receptacle for engaging the extensions, wherein the plurality of extensions are biased to be unengaged with the receptacle.
5. The method of claim 4 wherein the distal ends comprise apices and the system is configured to releasably capture the apices between the extensions and the receptacle.
6. The method of claim 1 wherein at least one distal end of the device is releasably attached to the catheter system by at least one string.
7. A method of implanting a device at a target site within the body having a main vessel and at least one laterally extending side branch vessel in fluid communication with the main vessel, where the device includes a main lumen and at least one side-branch lumen extending therefrom, the method comprising:
providing a catheter system within which the device is operatively loaded wherein each of a proximal end and distal end of the main lumen and a distal end of the at least one side-branch lumen is releasably attached to the catheter system;
advancing the distal end of the main lumen from a distal end of the catheter system wherein the distal end of the main lumen remains releasably attached to the system within the main vessel;
advancing the distal end of the at least one side-branch lumen from a distal end of the catheter system from the main vessel and adjacent to the main lumen laterally into the side branch vessel while the main lumen remains within the main vessel and wherein the distal end of the at least one side-branch remains releasably attached to the system; and
applying tension to the distal end of the at least one side branch lumen, independently of the main lumen, to elongate the at least one side branch lumen when located within the at least one side branch vessel and where controlling the tension allows expanding the side branch lumen into partial deployed position prior to release from the catheter system; and
detaching at least one of the advanced lumen ends from the system to implant the device.
8. The method of claim 7 , wherein the advanced distal ends are retractable to within the system prior to detachment from the system.
9. The method of claim 7 , wherein at least one distal end of the device is releasably attached to the catheter system by a spring-loaded mechanism.
10. The method of claim 9 , wherein the spring-loaded mechanism comprises a plurality of extensions and a receptacle for engaging the extensions, wherein the plurality of extensions are biased to be unengaged with the receptacle.
11. The method of claim 9 , wherein the distal ends comprise apices and the system is configured to releasably capture the apices between the extensions and the receptacle.
12. The method of claim 7 , wherein at least one distal end of the device is releasably attached to the catheter system by at least one string.
13. The method of claim 7 , where the main vessel comprises an aortic arch and where the at least one side branch vessels comprise a vessel selected from the group consisting of an innominate artery, a common carotid artery, and a subclavian artery.
14. The method of claim 7 , where the main vessel comprises an infrarenal aorta and where the at least one side branch vessels comprise a renal artery.
15. The method of claim 7 , where detaching at least one of the advanced distal ends comprises first expanding the main lumen in the main vessel while the at least one side-branch lumen remains in a tensioned state.
16. The method of claim 7 , where advancing the distal end of the at least one side-branch lumen comprises first positioning the main lumen of the device in the main vessel while in a stretched condition and subsequently positioning at least one side-branch lumen extending from the main lumen of the device in the at least one side branch vessel while in a stretched or tensioned state.
17. The method of claim 7 , wherein the device comprises a wire stent structure where the side branch lumen is adjustable relative to the main lumen until the device expands against the main branch vessel and side vessel.
18. The method of claim 7 , wherein the device comprises a wire stent structure where an angular orientation of the side branch lumen is adjustable on the device until the device expands against the main branch vessel and side branch vessel.
19. The method of claim 7 , further comprising maintaining continuous blood flow around the implantable device during placement.
20. The method of claim 7 , further comprising repositioning the device before fully detaching at least one of the advanced distal ends from the system to implant the device.
21. The method of claim 1 , wherein the distal end of the at least one branched lumen is urged or pulled into the side branch vessel.
22. The method of claim 7 , wherein the distal end of the at least one side branch lumen is urged or pulled into the side branch vessel.