Device and method for treating intraluminal tissue
A device and method for treating intraluminal tissue employ an inflatable member having a plurality of heating zones adapted for selective activation, whereby one or more of the heating zones can be activated, by one or more energy sources, to deliver heat to selected intraluminal tissue. The inflatable member can be a balloon that is attached to a catheter having a plurality of passageways for delivering fluids (i.e., liquid or air) to internal chambers of the balloon, thereby inflating the balloon. Each energy source is positioned within a corresponding chamber and may be any one of various types, including a piezoelectric cylinder, a microwave antenna, a cylindrical RF (radio-frequency) source, or a resistive heating coil.
1. A device for treating intraluminal tissue, comprising an inflatable member having an interior which is divided into a plurality of internal chambers arranged in a circular array, each of said chambers defining a heating zone; and activating means for selectively activating one or more of said heating zones deliver heat to intraluminal tissue over a selected radially extending area, said activating means including at least one energy source positioned within said interior of said inflatable member, said at least one energy source cooperating with said heating zones to directionally heat the intraluminal tissue.
2. A device according to claim 1 , wherein each of said chambers is adapted to receive a fluid therein.
3. A device according to claim 2 , wherein said at least one energy source is located within a corresponding one of said chambers.
4. A device a cording to claim 3 further comprising en insertion member including delivering means for delivering fluid to said chambers.
5. A device according to claim 4 , wherein said delivering means includes a plurality of passageway, each of said passageways communicating with a corresponding one of said chambers.
6. A device according to claim 5 , wherein a first fluid is supplied to any of said chambers which contains said at least one energy source; and wherein a second fluid is supplied to any of said chambers which does not contain said at least one energy source.
7. A device according to claim 6 , wherein said at least one energy source includes a piezoelectric element.
8. A device according to claim 7 , wherein said first fluid is water and said second fluid is air.
9. A device according to claim 7 , wherein said first fluid is a saline solution and said second fluid is air.
10. A device according to claim 7 , wherein said first fluid is a gel and said second fluid is air.
11. A device according to claim 6 , wherein said at least one energy source includes a microwave antenna.
12. A device according to claim 11 , wherein said first fluid is deionized water and said second fluid is a saline solution.
13. A device according to claim wherein said first fluid is air and said second fluid is a saline solution.
14. A device according to claim 11 , wherein each of said first and second fluids is a saline solution.
15. A device according to claim 6 , wherein said at least one energy source includes a resistive heating oil.
16. A device according to claim 15 , wherein said first fluid is water and said second fluid is air.
17. A device according to claim 15 , wherein said first fluid is water and said second fluid is water.
18. A device according to claim 6 , wherein said at least one energy source includes an RF energy element and a return electrode that is positioned within any of said chambers containing said at least one energy source.
19. A device according to claim 18 , wherein said first fluid is a saline solution and said second fluid is air.
20. A device according to claim 18 , wherein said RF energy element includes alternating active and return electrodes, whereby said return electrode is formed integrally with said RF energy element.
21. A device according to claim 2 , wherein said inflatable member includes a central axial lumen said energy source being located within said lumen, and said chambers extending radially outwardly from said lumen.
22. A method for selectively treating intraluminal tissue, comprising the steps of providing a inflatable member having interior which is divided into a plurality of internal chambers arranged in a circular array, each of said chambers defining a heating zone; positioning at least one energy source in said interior of said inflatable member inserting said inflatable member into the luminal structure of a patient adjacent to selected intraluminal tissue;
inflating said inflatable member and actuating said at least one energy source to thereby selectively activate one or more of said heating zones of said inflatable member such that heat is directionally delivered to said selected intraluminal tissue over a selected radially extending area.