Surgical instrument and method for use thereof

• US 7,815,641 B2
• Filed: 01/24/2007
• Issued: 10/19/2010
• Est. Priority Date: 01/25/2006
• Status: Expired due to Fees

• Current Assignee: Board of Regents of the University of Michigan (University of Michigan)
• Original Assignee: Board of Regents of the University of Michigan (University of Michigan)
• Inventors: Dodde, Robert, Roberts, William, Geiger, James, Shih, Albert J., Advincula, Arnold, Pipe, Kevin
• Primary Examiner(s): Dvorak; Linda C
• Assistant Examiner(s): Della; Jaymi
• Application Number:
  US11/626,812
• Publication Number:
  US 20070179489A1
• Time in Patent Office: 1,364 Days
• Field of Search: 606/48, 606 50- 52, 606 20- 26
• US Class Current: 606/51
• 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 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

Abstract

A surgical instrument for treating a tissue includes a handpiece and a tissue engaging portion arranged to be received by the handpiece. The tissue engaging portion includes first and second opposed jaw members having an open position and a closed position for engaging the tissue therebetween, where the first and second jaw members are arranged to receive surgical energy from a surgical generator. The tissue engaging portion further includes at least one cooling member spaced from at least one of the first and second jaw members, where the cooling member has an open position and a closed position for engaging the tissue. Positioning the jaw members in their closed position and applying surgical energy to the tissue allows for treatment of the tissue, and positioning the cooling member in its closed position provides at least one of a pressure gradient or a thermal gradient between the jaw members and the cooling member.

Claims

1. A surgical instrument for treating a tissue, comprising:

a handpiece; and

a tissue engaging portion arranged to be received by the handpiece, the tissue engaging portion comprising

first and second opposed jaw members having an open position and a closed position for engaging the tissue therebetween, the first and second jaw members arranged to receive surgical energy from a surgical generator, and

at least one cooling member spaced from at least one of the first and second jaw members, the at least one cooling member separately movable with respect to the jaw members and having an open position and a closed position for engaging the tissue,

wherein positioning the jaw members in their closed position and applying surgical energy to the tissue allows for treatment of the tissue, and positioning the at least one cooling member in its closed position provides at least one of a pressure gradient or a thermal gradient between the jaw members and the at least one cooling member.

2. The surgical instrument according to claim 1, wherein the jaw members have an arm-like configuration.

3. The surgical instrument according to claim 1, wherein the jaw members have a U-shaped configuration.

4. The surgical instrument according to claim 1, wherein the first jaw member comprises a first electrode and the second jaw member comprises a second electrode of opposite polarity from the first electrode.

5. The surgical instrument according to claim 1, wherein the at least one cooling member comprises a first cooling member generally surrounding the first jaw member and a second cooling member generally surrounding the second jaw member.

6. The surgical instrument according to claim 1, further comprising a first actuator operably connected to the first and second jaw members for effecting movement thereof.

7. The surgical instrument according to claim 6, wherein the first actuator is operably connected to the at least one cooling member for effecting movement thereof.

8. The surgical instrument according to claim 6, further comprising a second actuator operably connected to the at least one cooling member for effecting movement thereof.

9. The surgical instrument according to claim 1, wherein the at least one cooling member contains a coolant.

10. The surgical instrument according to claim 9, further comprising a pump in communication with the at least one cooling member for circulating the coolant therethrough.

11. The surgical instrument according to claim 1, wherein the at least one cooling member comprises a heat pipe.

12. The surgical instrument according to claim 1, wherein the at least one cooling member imparts a Peltier effect.

13. The surgical instrument according to claim 1, further comprising at least one temperature sensor provided on the tissue engaging portion.

14. An electrosurgical system, comprising:

a handpiece;

a tissue engaging portion arranged to be received by the handpiece, the tissue engaging portion comprising

first and second opposed electrodes of opposite polarity, the electrodes having an open position and a closed position for engaging the tissue therebetween, and

cooling members spaced from and generally surrounding each electrode, the cooling members separately movable with respect to the electrodes and having an open position and a closed position for engaging the tissue; and

an electrosurgical generator for supplying radio frequency energy to the electrodes,

wherein positioning the electrodes in their closed position and applying energy to the tissue allows for treatment of the tissue, and positioning the cooling members in their closed position provides at least one of a pressure gradient or a thermal gradient between the electrodes and the cooling members.

15. A method for treating a tissue, comprising:

providing a surgical instrument comprising a handpiece and a tissue engaging portion arranged to be received by the handpiece, the tissue engaging portion comprising first and second opposed jaw members having an open position and a closed position for engaging the tissue therebetween, the first and second jaw members arranged to receive surgical energy from a surgical generator, and at least one cooling member spaced from at least one of the first and second jaw members, the at least one cooling member separately movable with respect to the jaw members and having an open position and a closed position for engaging the tissue;

positioning the jaw members in their closed position and applying surgical energy to the tissue; and

positioning the at least one cooling member in its closed position to provide at least one of a pressure gradient or a thermal gradient between the jaw members and the at least one cooling member.

16. The method according to claim 15, wherein positioning the jaw members in their closed position and positioning the at least one cooling member in its closed position occurs at approximately the same time.

17. The method according to claim 15, wherein positioning the at least one cooling member in its closed position occurs prior to positioning the jaw members in their closed position.

18. The method according to claim 15, further comprising providing a coolant within the at least one cooling member.

19. The method according to claim 18, further comprising circulating the coolant through the at least one cooling member.

20. The method according to claim 19, wherein the at least one cooling member comprises a first cooling member generally surrounding the first jaw member and a second cooling member generally surrounding the second jaw member, wherein circulating the coolant includes circulating the coolant through the first and second cooling members in different flow directions.

21. The method according to claim 15, further comprising sensing a temperature adjacent the tissue engaging portion.