High-frequency capacitive heating electrode device

• US 4,961,435 A
• Filed: 10/17/1988
• Issued: 10/09/1990
• Est. Priority Date: 10/28/1987
• Status: Expired due to Term

• Current Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Original Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
• Inventors: Hosoi, Yoshio, Onodera, Chikau, Kitagawa, Kiyoshi, Onuma, Tadashi, Sogawa, Akira
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/258,513
• Time in Patent Office: 722 Days
• Field of Search: 128/784, 128/788, 128/804, 128/400, 128/401
• US Class Current: 607/138
• CPC Class Codes: A61N 1/06 for high-frequency therapy

Abstract

A high-frequency capacitive heating electrode device comprises a cap-shaped electrode, a flexible support for supporting the electrode with one end thereof capped with the electrode, a flexible polymer film which surrounds the electrode and forms a gastight space between the support and the flexible polymer film, and passages for respectively introducing and discharging a cooling medium to and from the gastight space. The high-frequency capacitive heating electrode device is disposed in the vicinity of the target portion of a living body to be heated and is useful for the hyperthermia therapy for a cancer of the uterine cervix.

Claims

1. An intracavitary electrode device for a high-frequency capacitive heating device, comprising:

a flexible member adapted to be inserted at a leading end portion thereof into an intracavity of an endotract organ of a living body;

a cap-shaped electrode disposed around said leading end portion covering both of an end surface of said leading end portion and a circumferential surface of said leading end portion, said circumferential surface being adjacent to said end surface;

a flexible polymer film enclosing said cap-shaped electrode so as to form a gas-tight space in association with said cap-shaped electrode and said flexible member, and secured on said flexible member at one end thereof;

an introducing passage disposed in said flexible member for introducing a cooling medium into said gas-tight space; and

a discharging passage disposed in said flexible member for discharging said cooling medium from said gas-tight space,

each of said introducing passage and said discharging passage communicating with said gas-tight space.

2. An electrode device according to claim 1, wherein said flexible member is bendable and is capable of retaining a bent state.

3. An electrode device according to claim 2, wherein said cap-shaped electrode comprises a discal portion covering said end surface of said leading end portion, and a cylindrical portion connected to a circumferential portion of said discal portion at one end thereof, and surrounding said circumferential surface of said leading end portion.

4. An electrode device according to claim 1, wherein said cap-shaped electrode comprises as discal portion covering said end surface of said leading end portion, and a cylindrical portion connected to a circumferential portion of said discal portion at one end thereof, and surrounding said circumferential surface of said leading end portion.

5. An electrode device according to claim 4, wherein said discal portions provided with a through hole.

6. An electrode device according to claim 5, wherein said discal portion is provided on an outer surface thereof with a plurality of grooves extending from said through hole to said circumferential portion of said discal portion.

7. An electrode device according to claim 6, wherein said cylindrical portion is provided with a plurality of through holes formed at a wall portion of said cylindrical portion at regular intervals.

8. An electrode device according to claim 7, wherein said cylindrical portion is provided on an outer circumferential surface thereof with a plurality of grooves extending from respective portions of said cylindrical portion which correspond to terminals of a plurality of said grooves of said discal portion to the other end of said cylindrical portion which is opposite to said discal portion.

9. An electrode device according to claim 1, wherein a spacer for spacing said flexible polymer film from said cap-shaped electrode is disposed between said cap-shaped electrode and said flexible polymer film.

10. An electrode device according to claim 9, wherein said cap-shaped electrode comprises a discal portion covering said end surface of said leading end portion, and a cylindrical portion connected to a circumferential portion of said discal portion at one end thereof and surrounding said circumferential surface of said leading end portion, said spacer comprises a plurality of annular spacers, and one of said annular spacers which is arranged on a most leading end side of said cylindrical portion protrudes outwardly from said discal portion.

11. An electrode device according to claim 9, wherein said spacer is formed of a reticulate, porous or other material.

12. An electrode device according to claim 9, wherein said spacer is made of an insulating material.

13. An electrode device according to claim 12, wherein said insulating material is silicone rubber or fluorocarbon polymers.