Electrode arrangement for electrothermal treatment of human or animal bodies

• US 6,818,000 B2
• Filed: 12/19/2002
• Issued: 11/16/2004
• Est. Priority Date: 09/04/1997
• Status: Expired due to Fees

• Current Assignee: Celon AG Medical Instruments
• Original Assignee: Celon AG Medical Instruments
• Inventors: Stein, Thomas, Muller, Gerhard, Desinger, Kai
• Primary Examiner(s): Gibson, Roy D.
• Assistant Examiner(s): Johnson, III, Henry M
• Application Number:
  US10/325,518
• Publication Number:
  US 20030097130A1
• Time in Patent Office: 698 Days
• Field of Search: 128/898, 606/27-50, 607/101-105
• US Class Current: 606/41
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 2018/00011 with fluids
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/00047 using Peltier effect
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/00684 using lookup tables
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00744 Fluid flow
• CPC Class Codes: A61B 2018/00791 Temperature
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/1425 Needle

Abstract

An electrode arrangement is provided having at least one electrode for insertion into a human or animal body for electrothermal treatment of the body. The electrode is situated on an electrode support and is connected to an alternating current source via a supply lead and to a temperature stabilizer device for influencing the effective temperature profile in a treatment area. The electrode support and the electrode, or electrodes, are constructed for direct insertion into body tissue, said insertion being channel forming. The temperature stabilizer device has a timed heating device.

Claims

1. An electrosurgery apparatus comprising:

an electrode carrier having a pointed configuration at a distal end;

at least one electrode on the electrode carrier;

a fluid flow path defined in the electrode carrier;

an alternating current source conductively connected to the electrode by way of a cable providing alternating current flow to said at least one electrode;

a temperature control device for the electrode and the electrode carrier; and

a fluid heater for heating the at least one electrode and the electrode carrier independent of the amplitude of the alternating current flowing through the at least one electrode.

2. An electrosurgery apparatus as set forth in claim 1 wherein the at least one electrode and the electrode carrier are heatable to a temperature of more than 30°

C.

3. An electrosurgery apparatus as set forth in claim 2 wherein the at least one electrode and the electrode carrier are heatable to a temperature of more than 37°

C.

4. An electrosurgery apparatus as set forth in claim 3 comprising:

a cavity in one of the at least one electrode and the electrode carrier; and

wherein the temperature control device includes a temperature-controllable fluid source which is in communication with one of the at least one electrode and the electrode carrier by way of a quantitative flow control device.

5. An electrosurgery apparatus as set forth in claim 1 wherein a fluid source provides a fluid to the fluid flow path.

6. An electrosurgery apparatus as set forth in claim 1 comprising an effective temperature profile control device which is coupled to the temperature control device.

7. An electrosurgery apparatus as set forth in claim 6, wherein the effective temperature profile control device is coupled to the alternating current source, for sending a control input for controlling the alternating current source.

8. An electrosurgery apparatus as set forth in claim 1 comprising two electrodes.

9. An electrosurgery apparatus as set forth in claim 1 wherein fluid flows through the flow path toward the distal end of the apparatus and back in a direction away from the distal end.

10. An electrosurgery apparatus as set forth in claim 1 wherein the at least one electrode is annular and wherein the flow path is defined within said at least one electrode.

11. An electrosurgery apparatus as forth in claim 1 further comprising a tube within the electrode wherein the flow path is defined through the tube.

12. An electrosurgery apparatus as set forth in claim 11 wherein an annulus is defined between the tube and the at least one electrode and wherein the fluid flow path is defined in a distal direction within the tube and in a direction away from the distal end within the annulus.

13. An electrosurgery apparatus as set forth in claim 1 further comprising a fluid flowing through the flow path for controlling the temperature of the apparatus.

14. An electorsugery apparatus as set forth in claim 13 wherein the fluid is heated by the fluid heater for heating the at least one electrode and the electrode carrier independent of the amplitude of the alternating current flowing through the at least one electrode.

15. An electrosurgery apparatus as set forth in claim 13 wherein the fluid is distilled water.

16. A method for electrothermal treatment of a human or animal patient comprising:

providing an electrosurgery apparatus comprising,

an electrode carrier having a pointed configuration at its distal end,

at least one electrode on the electrode carrier, and

a fluid flow path defined in the electrode carrier;

preheating the apparatus prior to an electrothermal treatment of a tissue in an area to be treated;

inserting the apparatus in the area of the patient to be treated such that the distal end is adjacent to the tissue in the area to be treated;

providing alternating current to the electrode for electrothemally treating the tissue; and

providing a fluid within the fluid flow path for controlling the temperature of the apparatus.

17. The method as recited in claim 16 wherein varying the temperature of the fluid varies the temperature of the apparatus.

18. The method as set forth in claim 16 wherein inserting further comprises controlling the temperature of the fluid for controlling the temperature of the apparatus to be above about 30°

C.

19. The method as set forth in claim 18 further comprising varying the temperature of the fluid when the distal end is adjacent to the tissue for varying the temperature of the apparatus.

20. The method as recited in claim 16 further comprising providing a tube within the apparatus for defining the flow path.

21. The method as recited in claim 20 further comprising defining an annulus between the tube and the at least one electorde and flowing the fluid through the tube distally toward the distal end and back away from the distal end through the annulus.

22. A method for electrothermal treatment of a human or animal patient comprising:

providing an electrosurgery apparatus comprising,

an electrode carrier having a pointed configuration at its distal end,

at least one electrode on the electrode carrier, and

a distilled water flow path defined in the electrode carrier;

inserting the apparatus in an area of the patient to be treated such that the distal end is adjacent to a tissue in the area to be treated;

providing alternating current to the electrode for electrothemally treating the tissue; and

providing distilled water within the distilled water flow path for controlling the temperature of the apparatus.

23. The method as recited in claim 22 wherein varying the temperature of the distilled water varies the temperature of the apparatus.

24. The method as set forth in claim 22 wherein inserting further comprises controlling the temperature of the distilled water for controlling the temperature of the apparatus to be above about 30°

C.

25. The method as set forth in claim 24 further comprising varying the temperature of the distilled water when the distal end is adjacent to the tissue for varying the temperature of the apparatus.

26. The method as recited in claim 22 further comprising providing a tube within the apparatus for defining the flow path.

27. The method as recited in claim 26 further comprising defining an annulus between the tube and the at least one electorde and flowing the distilled water through the tube distally toward the distal end and back away from the distal end through the annulus.