Surgery – Instruments – Electrical application
Patent
1994-10-06
1996-11-19
Sykes, Angela D.
Surgery
Instruments
Electrical application
606192, 606 32, 606 27, 607101, A61B 1736
Patent
active
055757880
ABSTRACT:
An ablation apparatus for ablating an inner layer in an organ or lumen of a body, or any desired thin layer, includes an expandable member made of a material with a porous exterior surface. An electrolytic solution, housed in an interior of the expandable member, releases electrolytic solution through the porous exterior surface. A conforming member, which can be an open cell foam material, has an RF conductive surface, and a back side in a surrounding relationship to an exterior surface of the expandable member. Further, the conforming member includes non-zone areas that have a first porosity rate for delivering electrolytic solution to the inner layer. The conforming member also includes a zone for housing each RF electrode and electrolytic solution. Zones have a second porosity rate that is less than the first porosity rate, thus permitting electrolytic solution to pass through the non-zone areas at a faster rate than in the zones. The zones provide an area where electrolytic solution is heated to a higher temperature, due to the differences in porosity with the non-zones. With the combination of the electrode and the heated electrolytic solution in each zone, a larger electrode is created, and there is a more effective, and even application of both RF and thermal energy to the tissue site, such as the endometrium.
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Singer, et al.; Preliminary Clinical Experience with a Thermal Balloon Endometrial Ablation Method to Treat Menorrhagia; Obstetrics & Gynecology, vol. 83, No. 5, Part 1, May 1994; pp. 732-734.
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Baker James
Edwards Stuart D.
Jones Chris
Lee Kee S.
Sommer Phillip
Edwards Stuart D.
Peffley Michael
Sykes Angela D.
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