Diathermic cutter

• US 20040210215A1
• Filed: 11/20/2003
• Published: 10/21/2004
• Est. Priority Date: 11/21/2002
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Okada, Tsutomu
• Granted Patent: US 7,371,236 B2
• Time in Patent Office: Days
• US Class Current: 606/45
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/1475 Electrodes retractable in or deployable from a housing

Abstract

There is disclosed a diathermic cutter including a cylindrical main body member having a central axis, an axially elongated member including a tip end portion movable so as to change a projected state from a tip end of the main body member along the central axis of the main body member, an electrode including a base end portion on which the tip end portion of the elongated member is disposed and extending in a direction deviating from the central axis of the elongated member, and an electrically insulating member with which the electrode is coated in such a manner that at least a part of a base-end surface of the base end portion of the electrode in the vicinity of the tip end of the main body member is exposed toward the tip end of the main body member.

Claims

1. A diathermic cutter comprising:

a cylindrical main body member having a central axis;

an elongated member which has a tip end portion projected from a tip end of the main body member and which is movably inserted in the main body member;

an electrode disposed on the tip end portion of the elongated member and extended in a direction deviating from the central axis of the elongated member; and

an electrically insulating member with which the electrode is coated in such a manner that at least a part of a base-end surface of the electrode disposed opposite to the tip end of the main body member is exposed.

2. A diathermic cutter according to claim 1, wherein the elongated member has electrically insulating properties with respect to the electrode.

3. A diathermic cutter according to claim 2, wherein at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

4. A diathermic cutter according to claim 2, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

5. A diathermic cutter according to claim 2, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

6. A diathermic cutter according to claim 1, wherein the elongated member has electrically conductive properties, and

the electrode is electrically connected to the elongated member to constitute one electrode member.

7. A diathermic cutter according to claim 6, wherein at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

8. A diathermic cutter according to claim 6, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

9. A diathermic cutter according to claim 6, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

10. A diathermic cutter according to claim 1, wherein the elongated member includes a first cylindrical member having a tip end being disposed in a position distant from the electrode and which has electrically conductive properties, and a second cylindrical member which is disposed outside the first cylindrical member and having a tip end being disposed on the base end of the electrode and which has electrically insulating properties.

11. A diathermic cutter according to claim 10, wherein at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

12. A diathermic cutter according to claim 10, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

13. A diathermic cutter according to claim 10, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

14. A diathermic cutter according to claim 1, wherein at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

15. A diathermic cutter according to claim 1, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

16. A diathermic cutter according to claim 1, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

17. A diathermic cutter comprising:

a cylindrical sheath;

an electrically insulating member disconnectably connected to a tip end of the sheath;

an electrode including a base end portion and coated with the electrically insulating member in such a manner that at least a part of the base end portion is exposed to the tip end of the sheath; and

an elongated member whose one end is connected to the base end portion of the electrode so as to move the electrically insulating member outside the sheath.

18. A diathermic cutter according to claim 17, wherein the elongated member has electrically insulating properties with respect to the electrode.

19. A diathermic cutter according to claim 18, wherein the sheath has a central axis on which the elongated member is concentrically disposed,

at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

20. A diathermic cutter according to claim 18, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

21. A diathermic cutter according to claim 18, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

22. A diathermic cutter according to claim 17, wherein the elongated member has electrically conductive properties, and

the electrode is electrically connected to the elongated member to constitute one electrode member.

23. A diathermic cutter according to claim 22, wherein the sheath has a central axis on which the elongated member is concentrically disposed,

at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

24. A diathermic cutter according to claim 22, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

25. A diathermic cutter according to claim 22, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

26. A diathermic cutter according to claim 17, wherein the elongated member includes a first cylindrical member having a tip end portion being disposed in a position distant from the electrode and which has electrically conductive properties, and a second cylindrical member which is disposed outside the first cylindrical member and having a tip end being disposed on the base end portion of the electrode and which has electrically insulating properties.

27. A diathermic cutter according to claim 26, wherein the sheath has a central axis on which the elongated member is concentrically disposed,

at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

28. A diathermic cutter according to claim 26, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

29. A diathermic cutter according to claim 26, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.

30. A diathermic cutter according to claim 17, wherein the sheath has a central axis on which the elongated member is concentrically disposed,

at least a part of the electrically insulating member and the electrode has a circular arc shape in a position distant from the central axis of a section crossing at right angles to the central axis, and

a radius of a circular arc of the electrically insulating member from the central axis is over with respect to that of the circular arc of the electrode.

31. A diathermic cutter according to claim 17, wherein the electrode includes a portion exposed to a side surface of the electrically insulating member.

32. A diathermic cutter according to claim 17, wherein the electrode includes a portion exposed to the outside from a side surface of the electrically insulating member.