Multifunctional electrosurgical apparatus

• US 7,306,596 B2
• Filed: 05/10/2005
• Issued: 12/11/2007
• Est. Priority Date: 05/26/2004
• Status: Active Grant

• Current Assignee: Avanos Medical Sales, LLC (Avanos Medical, Inc.)
• Original Assignee: Baylis Medical Company Inc. (Boston Scientific Corporation)
• Inventors: Godara, Neil, Hillier, Taylor, Shah, Krishan, Conquergood, Laura, Roza, Abraham
• Primary Examiner(s): Johnson, III; Henry M
• Application Number:
  US11/125,247
• Publication Number:
  US 20050267465A1
• Time in Patent Office: 945 Days
• Field of Search: 606 32- 52, 128/898
• US Class Current: 606/41
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 2018/00434 Neural system
• CPC Class Codes: A61B 2018/1472 for use with liquid electrolyte, e.g. virtual electrodes
• CPC Class Codes: A61N 1/06 for high-frequency therapy
• CPC Class Codes: A61N 1/36021 for treatment of pain
• CPC Class Codes: A61N 1/40 Applying electric fields by inductive or capacitive coupling microwave apparatus A61N5/00; Applying radio-frequency signals

Abstract

An electrosurgical apparatus having improved placement accuracy is provided. The electrosurgical apparatus comprises an elongate shaft having a proximal end, a distal end and at least one lumen therethrough, a stylet positioned within a lumen, a conductive tip at the distal end for delivery of energy to the tissue, an electrical coupling at or near the proximal end for flexibly coupling a power source control unit to supply energy to the conductive tip, a fluid delivery connection interface flexibly coupled at or near the proximal end for coupling a fluid delivery mechanism. The apparatus further comprises a temperature sensor. A method of delivering electrical energy to a target treatment area of an animal body is also provided.

Claims

1. An electrosurgical apparatus for treating tissue comprising:

an elongate shaft having a proximal region, a distal region comprising a conductive region and one or more lumens therethrough;

one or more apertures defined by the shaft in communication with at least one of said one or more lumens;

a stylet occluding at least a portion of an opening defined by a distal end of said elongate shaft;

an electrical connector permanently coupled to said proximal region via a flexible electrical cable for coupling said shaft to a power source for supplying energy to said conductive region;

a temperature sensor associated with said distal region; and

at least one fluid delivery interface connection permanently coupled to said proximal region via a flexible tube for coupling a fluid delivery mechanism to deliver a treatment composition through at least one of said one or more apertures;

wherein said temperature sensor comprises a thermocouple and wherein said stylet is a component of said thermocouple.

2. The electrosurgical apparatus of claim 1, wherein said stylet is attached to said shaft.

3. The electrosurgical apparatus of claim 2, wherein said stylet is attached to said shaft through an attachment means selected from the group consisting of a weld joint, a solder joint and a mechanical crimp.

4. The electrosurgical apparatus of claim 1, wherein said portion of an opening comprises a majority of an opening defined by said distal end of said shaft and wherein a distal end of said stylet is flush with said distal end of said elongate shaft.

5. The electrosurgical apparatus of claim 1, further comprising at least one connector flexibly coupled at or near said proximal region for coupling at least one treatment tool.

6. The electrosurgical apparatus of claim 1, wherein at least one of said one or more apertures is located in a side of said shaft.

7. The electrosurgical apparatus of claim 6, wherein said at least one of said one or more apertures has a smooth edge for minimizing trauma to bodily tissue.

8. The electrosurgical apparatus of claim 6, further comprising a marker associated with said proximal region to indicate an orientation of said at least one of said one or more apertures.

9. The electrosurgical apparatus of claim 1, wherein at least one of said one or more apertures is associated with said distal region of said shaft.

10. The electrosurgical apparatus of claim 9, wherein said at least one of said one or more apertures is defined by a space between said stylet and said shaft.

11. The electrosurgical apparatus of claim 1, wherein said distal end of said shaft comprises a shape that facilitates penetration of tissue.

12. The electrosurgical apparatus of claim 1, wherein at least one of said one or more lumens houses wiring.

13. The electrosurgical apparatus of claim 12, wherein said wiring couples said conductive region to said power source.

14. The electrosurgical apparatus of claim 12, wherein at least a portion of said wiring is connected to said temperature sensor.

15. The electrosurgical apparatus of claim 1, further comprising a handle associated with said proximal region, wherein said handle is coupled to said elongate shaft.

16. The electrosurgical apparatus of claim 15, wherein said handle comprises at least one marking to indicate rotation of the apparatus about a longitudinal axis of said elongate shaft.

17. The electrosurgical apparatus of claim 16, wherein said handle comprises two or more markings and wherein at least two markings are located on opposing faces of said handle.

18. The electrosurgical apparatus of claim 15, wherein said handle further comprises a strain relief supporting at least one of said electrical cable, said tube and wiring extending from said handle.

19. The electrosurgical apparatus of claim 18, wherein said strain relief holds at least two of said electrical cable, said tube and wiring closely together and parallel to a longitudinal axis of said handle.

20. The electrosurgical apparatus of claim 15, wherein said handle further comprises a grip to ease handling of the apparatus during insertion and rotation.

21. The electrosurgical apparatus of claim 20, wherein said grip comprises a means of determining an orientation of said apparatus.

22. The electrosurgical apparatus of claim 1, further comprising a radiopaque marker.

23. The electrosurgical apparatus of claim 15, wherein said electrical cable and said flexible tubing extend from said handle closely together and parallel to a longitudinal axis of said handle.

24. A treatment procedure for delivering energy to a treatment area of an animal body comprising:

providing a treatment system comprising a power source, a fluid delivery mechanism and an electrosurgical apparatus;

coupling said power source to said electrosurgical apparatus at a distance from said electrosurgical apparatus through an electrical coupling means flexibly coupled to said electrosurgical apparatus while maintaining said position of said apparatus within said animal body;

coupling said fluid delivery mechanism to said electrosurgical apparatus at a distance from said electrosurgical apparatus through a fluid delivery interface connection coupled to said electrosurgical apparatus via a flexible tube while maintaining said position of said apparatus within said animal body;

positioning the apparatus at or in the vicinity of a treatment area within said animal body;

administering a treatment composition from said fluid delivery mechanism to said animal body via said electrosurgical apparatus while maintaining the position of the apparatus within said animal body;

delivering energy from said power source to said animal body via said electrosurgical apparatus; and

monitoring temperature at a distal region of said electrosurgical apparatus;

wherein coupling said energy source and said fluid delivery mechanism to said electrosurgical apparatus at a distance from the electrosurgical apparatus reduces forces on the electrosurgical apparatus and allows said position of said electrosurgical apparatus to be maintained during the course of said treatment procedure.

25. An electrosurgical apparatus for treating tissue comprising:

an elongate shaft having a proximal region, a distal region comprising a conductive region and one or more lumens therethrough;

one or more apertures defined by the shaft in communication with at least one of said one or more lumens;

a stylet occluding at least a portion of an opening defined by a distal end of said elongate shaft;

an electrical connector permanently coupled to said proximal region via a flexible electrical cable for coupling said shaft to a power source for supplying energy to said conductive region;

a temperature sensor associated with said distal region; and

at least one fluid delivery interface connection permanently coupled to said proximal region via a flexible tube for coupling a fluid delivery mechanism to deliver a treatment composition through at least one of said one or more apertures;

wherein said temperature sensor comprises a thermocouple and wherein said conductive region is a component of said thermocouple.