Electrosurgical device with offset conductive element

• US 8,939,969 B2
• Filed: 09/30/2011
• Issued: 01/27/2015
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: Avent Incorporated (Avanos Medical, Inc.)
• Original Assignee: Kimberly-Clark Incorporated (Kimberly-Clark Corporation)
• Inventors: Temelli, Deniz, Godara, Neil
• Primary Examiner(s): Kahelin, Michael
• Assistant Examiner(s): FAIRCHILD, MALLIKA DIPAYAN
• Application Number:
  US13/249,908
• Publication Number:
  US 20130085487A1
• Time in Patent Office: 1,215 Days
• Field of Search: 606/41, 606/45, 606/49
• US Class Current: 606/41
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 2018/00005 Cooling or heating of the probe or tissue immediately surrounding the probe
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/00339 Spine, e.g. intervertebral disc
• CPC Class Codes: A61B 2018/00434 Neural system
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2018/00821 measured by a thermocouple
• CPC Class Codes: F04C 2270/041 Controlled or regulated

Abstract

A device for forming a lesion includes a hub defining a passageway and a shaft attached to the hub and defining a lumen. The shaft has a proximal end and a distal end extending away from the hub. The shaft includes an electrically conductive material on at least a portion of an inner surface and on at least a portion on an outer surface. A conductive member has a longitudinal axis and is attached to a mounting structure mateable with mounting structure of the hub so that the conductive member extends through the passageway into the lumen so that at least near the hub the conductive member longitudinal axis is spaced from the lumen longitudinal axis to create electrical contact between the conductive member outer surface and the shaft inner surface.

Claims

1. A device for forming a lesion comprising:

a hub defining a passageway therethrough and having a mounting structure at one end of the passageway;

a shaft attached to the hub and defining lumen therethrough having a longitudinal axis, the shaft having a proximal end attached to the hub in communication with the passageway and a distal end extending away from the hub, the shaft including an electrically conductive material on at least a portion of an inner surface and an electrically conductive material on at least a portion of an outer surface; and

a conductive member having a longitudinal axis, the conductive member being attached to a mounting structure mateable with the mounting structure of the hub so that the conductive member extends through the passageway into the lumen, wherein the conductive member longitudinal axis is spaced apart from the lumen longitudinal axis by an offset, thereby assisting in creating electrical contact between the conductive member outer surface and the shaft inner surface.

2. The device of claim 1, wherein the shaft is flexible along at least a part of its length.

3. The device of claim 1, wherein the conductive member is flexible along at least a part of its length.

4. The device of claim 1, wherein the conductive member is selectively removable from the lumen.

5. The device of claim 1, wherein the shaft defining the lumen comprises a cannula.

6. The device of claim 1, wherein the conductive member is connectable to a radio frequency generator.

7. The device of claim 6, wherein the conductive member includes a hypotube.

8. The device of claim 1, further including an obturator removably insertable into the lumen for substantially filling the lumen when the shaft is inserted into a surgical site.

9. The device of claim 8, wherein the obturator has an outer diameter that is less than a diameter of the shaft inner surface.

10. The device of claim 1, wherein the conductive member extends from the lumen when fully inserted.

11. The device of claim 1, wherein the shaft defining the lumen has a gauge size and the conductive member has a gauge size that is smaller than the gauge size of the lumen.

12. A device for forming a lesion insertable into a hub defining a passageway therethrough and having a mounting structure at one end of the passageway, a shaft attached to the hub and defining a lumen therethrough having a longitudinal axis and having a proximal end being attached to the hub in communication with the passageway, the shaft having a distal end extending away from the hub, the shaft including an electrically conductive material on at least a portion of an inner surface and an electrically conductive material on at least a portion on an outer surface, the device comprising:

a conductive member having a longitudinal axis, the conductive member being attached to a mounting structure mateable with the mounting structure of the hub so that the conductive member extends through the passageway into the, wherein the conductive member longitudinal axis is spaced apart from the lumen longitudinal axis by an offset, thereby assisting in creating electrical contact between the conductive member outer surface and the shaft inner surface.

13. The device of claim 12, wherein the shaft is flexible along at least a part of its length.

14. The device of claim 12, wherein the conductive member is flexible along at least a part of its length.

15. The device of claim 12, wherein the conductive member is selectively removable from the lumen.

16. The device of claim 12, wherein the shaft defining the lumen comprises a cannula.

17. The device of claim 12, wherein the conductive member is connectable to a radio frequency generator.

18. The device of claim 17, wherein the conductive member includes a hypotube.

19. The device of claim 12, further including an obturator removably insertable into the lumen for substantially filling the lumen when the shaft is inserted into a surgical site.

20. The device of claim 19, wherein the obturator has an outer diameter that is less than a diameter of the shaft inner surface.

21. The device of claim 12, wherein the conductive member extends from the lumen when fully inserted.

22. The device of claim 12, wherein the shaft defining the lumen has a gauge size and the conductive member has a gauge size that is smaller than the gauge size of the lumen.