Single lumen cautery forceps

• US 9,795,440 B2
• Filed: 11/10/2014
• Issued: 10/24/2017
• Est. Priority Date: 12/06/2012
• Status: Active Grant

• Current Assignee: NICO Corporation
• Original Assignee: NICO Corporation
• Inventors: Mark, Joseph L., Dougherty, Brian C.
• Primary Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US14/536,724
• Publication Number:
  US 20150066019A1
• Time in Patent Office: 1,079 Days
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 18/1447 wherein sliding surfaces cause opening/closing of the end effectors
• CPC Class Codes: A61B 2018/1475 Electrodes retractable in or deployable from a housing
• CPC Class Codes: A61B 2218/002 Irrigation
• CPC Class Codes: A61B 2218/007 Aspiration

Abstract

Multiple surgical devices that may be used during surgical procedures are shown and described herein. A surgical device includes an outer cannula and an inner member that has a pair of electrodes positioned at a distal end. The inner member defines an aspiration delivery channel with an opening. The inner member further defines a pair of electrode channels within which the electrodes are positioned. A handle assembly actuates the outer cannula relative to the inner member, thereby adjusting a size of the opening of the aspiration delivery channel. An irrigation hub is provided to deliver irrigation through the surgical device to the electrode channels.

Claims

1. A surgical device comprising:

an inner member having a proximal end and a compliant distal end, the inner member including a pair of electrode channels that open at the distal end, the distal end further including a lumen opening;

a pair of electrodes configured to deliver energy, wherein a respective one of the pair of electrodes is configured to be disposed in each electrode channel such that distal ends of each of the electrodes are arranged to protrude from the distal end of the inner member;

an outer cannula extending about a portion of the inner member and being movable along a long axis relative to the inner member between a first position and a second position to selectively compress the compliant distal end of the inner member;

a support member and a rail member, the inner member being axially fixed with respect to the support member, the outer cannula mount being fixedly coupled to the rail member; and

a handle configured to move the outer cannula between the first and second positions by moving the rail axially relative to the support member.

2. The surgical device of claim 1, wherein each of the electrode channels has a respective diameter that is larger than a diameter of the electrodes so as to form an irrigation annulus between the electrodes and an inner surface of the electrode channels.

3. The surgical device of claim 2, wherein the outer cannula has an aperture in fluid communication with the electrode channels to provide fluid.

4. The surgical device of claim 3, further comprising an irrigation hub having first and second irrigation channels fluidly coupling the electrode channels and the aperture to provide fluid.

5. The surgical device of claim 4, further comprising an outer cannula mount coupled to the outer cannula, the outer cannula mount extending around a portion of the irrigation hub.

6. The surgical device of claim 5, further comprising sealing members disposed at proximal and distal ends of the irrigation hub, the sealing members cooperating with the irrigation hub to define a sealed irrigation chamber within the outer cannula mount.

7. The surgical device of claim 1, wherein the handle comprises first and second arms, wherein the first arm is operatively connected to the rail such that as the first arm is moved, the rail moves, and wherein the second arm is fixedly connected to the support member.

8. A surgical device comprising:

a support member;

an outer cannula mount fixedly mounted to a rail member, the outer cannula mount defining a cavity and an aperture in fluid communication with the cavity;

an outer cannula coupled to the outer cannula;

an inner member disposed within the outer cannula and having a pair of electrodes extending from a flexible tip member positioned at a distal end of the inner member, wherein the inner member defines an aspiration delivery channel having an opening at the distal end of the inner member and further defines a pair of electrode channels extending around the electrodes, the electrode channels being in fluid communication with the cavity; and

a handle assembly configured to move the rail member with respect to the support member to move the outer cannula over the inner member, thereby compressing the flexible tip member within the outer cannula.

9. The surgical device of claim 8, further comprising an irrigation hub retained within the outer cannula mount and fitted about the inner member, the irrigation hub having irrigation passages fluidly coupling the electrode channels and the cavity.

10. The surgical device of claim 9, further comprising sealing members disposed at proximal and distal ends of the irrigation hub, the sealing members cooperating with the irrigation hub to define a sealed irrigation chamber within the cavity.

11. The surgical device of claim 8, wherein the flexible tip member is defined by a wall thickness, and wherein the tip member further includes a pair of land members having an increased wall thickness as compared to a remainder of the tip member, wherein the land members are arranged in an opposing manner.

12. The surgical device of claim 8, wherein a proximal end of the inner member is configured to be operatively attached to a vacuum supply source.

13. The surgical device of claim 8, wherein the handle assembly further comprises first and second arms, wherein the first arm is operatively connected to the rail member such that as the first arm is moved, the rail member moves, and wherein the second arm is fixedly connected to the support member.

14. The surgical device of claim 8, further comprising an aspiration supply connector operatively connected to a proximal end of the inner member.

15. The surgical device of claim 8, wherein the handle assembly is configured to move the rail member axially relative to the support member between first and second positions, and wherein the electrodes do not touch as the rail member moves between the first position and second position.

16. A surgical device comprising:

a support member;

an inner member defining an aspiration chamber, a first electrode passage, and a second electrode passage, the inner member defining a long axis and being axially fixed relative to the support member;

a first electrode disposed within the first electrode passage, a diameter of the first electrode being less than a diameter of the first electrode passage;

a second electrode disposed within the second electrode passage, a diameter of the second electrode being less than a diameter of the second electrode passage;

an irrigation hub coupled to the inner member, the irrigation hub having a first irrigation passage fluidly coupled with the first electrode passage and a second irrigation passage fluidly coupled with the second electrode passage;

a rail member;

an outer cannula mount coupled to the rail member, the outer cannula mount extending about a portion of the irrigation hub and having an aperture in fluid communication with the first irrigation passage and the second irrigation passage;

an outer cannula coupled to the outer cannula mount and being fitted about a portion of the inner member; and

a handle assembly configured to axially move the rail member relative to the support member.

17. The surgical device of claim 16, further comprising a first sealing member disposed at a proximal end of the irrigation hub and a second sealing member disposed at a distal end of the irrigation hub, the first sealing member and second sealing member cooperating with the irrigation hub to define a sealed irrigation chamber within the outer cannula mount.

18. The surgical device of claim 16, wherein the handle assembly further comprises first and second arms, wherein the first arm is operatively connected to the rail such that as the first arm is moved, the rail moves, and wherein the second arm is fixedly connected to the support member.

19. The surgical device of claim 16, further comprising an aspiration supply connector operatively connected to a proximal end of the inner member.