Inductively coupled electrosurgical instrument

• US 5,849,020 A
• Filed: 06/30/1997
• Issued: 12/15/1998
• Est. Priority Date: 06/30/1997
• Status: Expired due to Fees

• Current Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Knodel, Bryan D., Long, Gary L., Freeman, Lynetta J.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US08/885,517
• Time in Patent Office: 533 Days
• Field of Search: 606/167, 606/170, 606/169, 606/40, 606/38, 606/32, 606/28, 606/185
• US Class Current: 606/167
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 17/3476 Powered trocars, e.g. electrosurgical cutting, lasers, powered knives
• CPC Class Codes: A61B 18/1447 wherein sliding surfaces cause opening/closing of the end effectors
• CPC Class Codes: A61B 18/1487 Trocar-like, i.e. devices producing an enlarged transcutaneous opening
• CPC Class Codes: A61B 2018/1286 having a specific transformer
• CPC Class Codes: H02J 50/10 using inductive coupling

Abstract

In the present invention, a cordless inductively coupled electrosurgical instrument is adapted to receive electrosurgical energy from a specially designed trocar or trocar adapter. In one embodiment of the present invention, an electrosurgical instrument includes a handle, an elongated tube and an electrosurgical end effector. The handle may include an actuator such as a trigger which is operatively connected to the end effector through the elongated tube. The elongated tube may be, for example, a closure tube which is adapted to close the end effector when the handle actuator is moved. The electrosurgical end effector is adapted to apply electrosurgical energy to biological tissue in order to effect treatment of the tissue. The elongated closure tube includes one or more inductor coils adapted to couple electrosurgical energy to the end effector. The one or more inductor coils are electrically connected to the end effector through one or more electrical conductors.

Claims

1. An electrosurgical instrument wherein said electrosurgical instrument comprises:

a) a handle;

b) an end effector operatively connected to said handle;

c) an elongated tube connecting said end effector to said handle;

d) an inductor positioned in said elongated tube, wherein said inductor comprises an inductive coil including first and second electrical leads, said first and second electrical leads being electrically coupled directly to said end effector.

2. An electrosurgical instrument according to claim 1 wherein said elongated tube includes a ferromagnetic material.

3. An electrosurgical instrument according to claim 1 wherein said elongated tube includes a material having a high relative magnetic permeability.

4. An endoscopic electrosurgical instrument wherein said electrosurgical instrument comprises:

a) a handle;

b) an end effector operatively connected to said handle and including a first electrode and a second electrode;

c) an elongated tube connecting said end effector to said handle;

d) an inductor positioned in said elongated tube, wherein said inductor is electrically connected directly to said first electrode by a first electrical conductors, and directly to said second electrode by a second electrical conductor.

5. An electrosurgical instrument according to claim 4 wherein said elongated tube includes a ferromagnetic material.

6. An electrosurgical instrument according to claim 4 wherein said elongated tube includes a material having a high relative magnetic permeability.

7. An electrosurgical instrument wherein said electrosurgical instrument comprises:

a) a handle including an actuator;

b) an end effector including first and second electrodes wherein said end effector comprises a first grasping element and a second grasping element;

c) an elongated, electrically conductive tube having an internal surface and an external surface, wherein said tube connects said end effector to said handle and includes a mechanism operatively connecting said end effector to said actuator;

d) an inductor coil positioned in said tube around said mechanism and extending along a central axis of said tube;

e) first and second conductors electrically connected to first and second ends of said inductor coil;

f) said first conductor being electrically connected to said elongated tube wherein said elongated tube is electrically connected to said first electrode;

g) said second conductor being connected to said second electrical contact.

8. An electrosurgical instrument according to claim 7 wherein said elongated tube includes a ferromagnetic material.

9. An electrosurgical instrument according to claim 7 wherein said elongated tube includes a material having a high relative magnetic permeability.

10. An inductive electrosurgical instrument wherein said electrosurgical instrument comprises:

a) a handle means for holding said instrument;

b) an end effector means for treating tissue wherein said end effector means is operatively connected to said handle;

c) an elongated tube means for connecting said end effector means to said handle means;

d) an inductive coupling means for electrically coupling electricity through said elongated tube means to said instrument, wherein said inductive coupling means is electrically connected directly to said end effector by first and second conductors.

11. An electrosurgical instrument according to claim 10 wherein said elongated tube includes a ferromagnetic material.

12. An electrosurgical instrument according to claim 10 wherein said elongated tube includes a material having a high relative magnetic permeability.

13. An endoscopic inductive electrosurgical instrument wherein said electrosurgical instrument comprises:

a) a handle means for holding said instrument;

b) an end effector means for treating tissue wherein said end effector means is operatively connected to said handle means and including first and second electrode means for transmitting electrical energy to tissue contacted by said end effector;

c) an elongated tube for connecting said end effector to said handle;

d) an inductive coupling means for coupling electrical energy to said first electrode wherein said inductive coupling means is positioned in said elongated tube; and

e) first and second electrical conductor means for conducting electricity from said inductive coupling means directly to said electrode means.

14. An electrosurgical instrument according to claim 13 wherein said elongated tube includes a ferromagnetic material.

15. An electrosurgical instrument according to claim 13 wherein said elongated tube includes a material having a high relative magnetic permeability.

16. An electrosurgical instrument wherein said electrosurgical instrument comprises:

a) a handle means for holding said instrument;

b) an actuator means attached to said handle for opening and closing an end effector

c) an end effector means for manipulating tissue, said end effector means including first and second electrodes;

d) an elongated, electrically conductive tube means for operatively connecting said handle to said end effector, including a mechanism means for operatively connecting said end effector to said actual;

e) first and second electric conductor means for electrically connecting said inductor means directly to said end effector.

17. An electrosurgical instrument according to claim 16 wherein said elongated tube means includes a ferromagnetic material.

18. An electrosurgical instrument according to claim 16 wherein said elongated tube means includes a material having a high relative magnetic permeability.