Endoluminal lining
A cylindrical lining for insertion into a body lumen having a fluctuating caliber, such as a pulsating artery, peristaltic organ, or a lumen adjacent to a sphincter. The lining has a radial resistance less than a radial force applied to it by the lumen as the caliber of the lumen fluctuates so as to allow the lining to continuously conform to the shape of the lumen.
1. A device for insertion into a body lumen having a fluctuating caliber, the device comprising:
a cylindrical lining having a radial resistance less than a radial force originated by the body and applied to the lining by the lumen as the caliber of the lumen fluctuates so as to allow the lining to continuously conform to the shape of the lumen; and
a stent withstanding all radial forces originated by the body and exerted on the stent by the lumen wall such that the caliber of the stent does not decrease after deployment into the lumen,
wherein (1) the cylindrical lining is tapered at least at one end on an inner and an outer surface of the cylindrical lining such that a thickness of the lining between the inner and outer surfaces is uniform along the taper, (2) the lining and the stent form a continuous tubular structure, (3) a thickness of the stent is of equal thickness as that of the lining, (4) the thickness of the stent is uniform across its length, (5) the lining is formed from a resilient film fashioned into an undulating helix and (6) spaces between parts of the filament are filled with a bio-stable polymeric membrane.
2. The device according to claim 1 , wherein the stent is flanked by two of the linings.
3. A method for treating a body lumen comprising inserting into the lumen the device according to claim 2 .
4. The method according to claim 3 wherein the lumen is adjacent to a sphincter.
5. The method according to claim 3 wherein the lumen is a pulsating artery or a peristaltic organ.
6. The device according to claim 1 , wherein the lining is flanked by two of the stents.
7. A method for treating a body lumen comprising inserting into the lumen the device according to claim 6 .
8. The method according to claim 7 wherein the lumen is adjacent to a sphincter.
9. The method according to claim 7 wherein the lumen is a pulsating artery or a peristaltic organ.
10. The device according to claim 1 , further comprising two of the linings joined by a tether.
11. An endovascular graft comprising the device according to claim 1 .
12. The device of claim 1 , wherein the lining includes elastic elements that are embedded in or surrounded by a flexible material.
13. The device according to claim 1 , wherein the entire length of the cylindrical lining has a radial resistance less than a radial force originated by the body and applied to the lining by the lumen as the caliber of the lumen fluctuates so as to allow the lining to continuously conform to the shape of the lumen.
14. The device according to claim 1 , wherein the filament is made from at least one of spring steel and shape memory alloy.
15. A method for treating a body lumen comprising inserting into the lumen the device according to claim 1 .
16. The method according to claim 15 wherein the lumen is adjacent to a sphincter.
17. The method according to claim 15 wherein the lumen is a pulsating artery or a peristaltic organ.
18. A method for treating a body lumen in which a stent has been implanted, comprising:
inserting into a lumen the device according to claim 1 , wherein the lining of the device has an unstrained caliber larger than a maximum caliber of the lumen and the stent of the device is configured to be expandable within a lumen of the previously implanted device.
19. The method according to claim 18 wherein the lumen is adjacent to a sphincter.
20. The method according to claim 18 wherein the lumen is a pulsating artery or a peristaltic organ.