Endovascular aneurysm devices, systems, and methods
Devices, systems, and methods for implanting prostheses in the body lumens rely on tacking or anchoring the prostheses with separately introduced fasteners. After initial placement, a fastener applier system is introduced within the expanded prostheses to deploy a plurality of fasteners to at least one prosthesis end. The fasteners are usually helical fasteners which are releasably restrained on the fastener driver, and are delivered by rotation of the fastener driver. The fasteners may be applied singly, typically in circumferentially spaced-apart patterns about the interior of at least one end of the prosthesis. A lumen extension or lumens may be coupled to the prosthesis to extend the reach of the prosthesis within the implantation site. Fasteners may also be applied to the lumen extensions.
1. A seal assembly for an endovascular device, the seal assembly comprising:
a first seal component comprising a center post and a collar that extends radially from an end of the center post, wherein the collar comprises at least one guide tube formed therethrough, the at least one guide tube being radially outward of the center post;
a second seal component with at least one guide tube formed therethrough, the second seal component registering with the first seal component with the at least one guide tube in the second component coaxially aligned with the at least one guide tube in the first component; and
a septum sandwiched between the first and second seal components, the septum accommodating passage of a control filament from one of the coaxially aligned guide tubes, through the septum, to the other one of the coaxially aligned guide tubes, thereby providing a fluid seal for the control filament, the center post of the first seal component passing through the septum.
2. The assembly of claim 1 , wherein at least one of the first and second seal components is substantially rigid.
3. The assembly of claim 2 , wherein the septum comprises a soft material.
4. The assembly of claim 2 , wherein the septum comprises silicone rubber.
5. The assembly of claim 2 , wherein the septum comprises a gasket.
6. The assembly of claim 1 , wherein both of the first and second seal components are substantially rigid.
7. The assembly of claim 6 , wherein the septum comprises a soft material.
8. The assembly of claim 6 , wherein the septum comprises silicone rubber.
9. The assembly of claim 6 , wherein the septum comprises a gasket.
10. The assembly of claim 1 , wherein the second seal component comprises an annular ring that fits about the center post.
11. The assembly of claim 1 , wherein the septum is disposed about the center post.
12. The assembly of claim 1 , wherein both the first seal component and the second seal component include coaxial guide tubes to accommodate passage of the control filament.
13. The assembly of claim 12 , wherein the guide tubes act as bearing surfaces or guides for the control filament.
14. The assembly of claim 1 , wherein the collar and the center post are integral.
15. An endovascular apparatus comprising:
a catheter assembly including an operative element that, in use, is exposed to a body fluid;
a control element;
a control filament coupled at one end to the control element and at an opposite end to the operative element; and
a seal assembly between the control element and the operative element through which the control filament passes to prevent contact between the body fluid and the control element, the seal assembly comprising:
a first seal component comprising a center post and a collar that extends radially from an end of the center post, wherein the collar comprises at least one guide tube formed therethrough, the at least one guide tube being radially outward of the center post;
a second seal component with at least one guide tube formed therethrough, the second seal component registering with the first seal component with the at least one guide tube in the second component coaxially aligned with the at least one guide tube in the first component; and
a septum sandwiched between the first and second seal components, the septum accommodating passage of the control filament from one of the coaxially aligned guide tubes, through the septum, to the other one of the coaxially aligned guide tubes, thereby providing a fluid seal for the control filament, the center post of the first seal component passing through the septum.
16. The apparatus of claim 15 , further comprising:
a flush passage passing through the seal assembly for conveying a heparinized saline to flush the operative element prior to deployment.
17. The apparatus of claim 16 , wherein the center post defines a passage that sealingly engages the flush passage.
18. The apparatus of claim 17 , wherein the second seal component comprises an annular ring that fits about the center post.
19. The apparatus of claim 17 , wherein the septum is disposed about the center post.
20. The apparatus of claim 15 , wherein both the first seal component and the second seal component include coaxial guide tubes to accommodate passage of the control filament.
21. The apparatus of claim 15 , wherein the guide tubes act as bearing surfaces or guides for the control filament.
22. The apparatus of claim 15 , wherein the control filament comprises at least one release wire for one of a sealing stent, a graft, and a lumen.
23. The apparatus of claim 15 , wherein the seal assembly comprises a dynamic seal that prevents contact between the body fluid and the control element even if the control filament is tensioned in a non-axial direction during operation.