Fluid-assisted electrosurgical instrument with shapeable electrode

• US 7,967,816 B2
• Filed: 01/25/2002
• Issued: 06/28/2011
• Est. Priority Date: 01/25/2002
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Jahns, Scott, Francischelli, David, Briscoe, Roderick, Ocel, Jon, Keogh, James R.
• Primary Examiner(s): GIBSON, ROY DEAN
• Application Number:
  US10/056,807
• Publication Number:
  US 20030144656A1
• Time in Patent Office: 3,441 Days
• Field of Search: 606 27- 52
• US Class Current: 606/41
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2018/1472 for use with liquid electrolyte, e.g. virtual electrodes
• CPC Class Codes: A61B 5/283 Invasive
• CPC Class Codes: A61B 5/7475 User input or interface means, e.g. keyboard, pointing device, joystick
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems

Abstract

An electrosurgical instrument including an elongated shaft and a non-conductive handle. The shaft defines a proximal section, a distal section, and an internal lumen extending from the proximal section. The distal section forms an electrically conductive tip and defines at least one passage for distributing fluid. Further, the shaft is adapted to be transitionable from a straight state to a first bent state. The shaft is capable of independently maintaining the distinct shapes associated with the straight state and the first bent state. The handle is rigidly coupled to the proximal section of the shaft. With this in mind, an exterior surface of the shaft distal the handle and proximal the distal section is electrically non-conductive. In one preferred embodiment, the shaft is comprised of an elongated electrode body surrounded by an electrical insulator.

Claims

1. A medical device for use in a medical procedure comprising:

a manually graspable handle;

an elongated shaft projecting from the handle, the shaft being sized and shaped to be positioned through a small incision in the chest of a patient and defining a proximal section comprising a rigid, elongated metal tube and a distal section comprising metal and a rounded distal tip portion adapted to be slid relative to tissue, the shaft including a joint comprising a pin that moveably couples the distal section to the proximal section thereby allowing the distal section to pivot relative to the proximal section;

a non-conductive material surrounding at least a portion of the elongated shaft;

a remote actuator proximal the distal section for selectively controlling the actuation of the joint;

a power source comprising a battery;

a light located on the distal section and electrically coupled to the power source; and

a switch located on the medical device for activating the delivery of electrical power from the power source, wherein the light is visible when power is being delivered.

2. The medical device of claim 1, wherein the distal section includes a passage.

3. The medical device of claim 1, wherein the distal section includes an opening.

4. The medical device of claim 1, wherein the distal section includes a hole.

5. The medical device of claim 1, wherein the distal section includes a slot.

6. The medical device of claim 1, wherein the actuator comprises a knob.

7. The medical device of claim 1, wherein the actuator comprises a button.

8. The medical device of claim 1, wherein the actuator comprises a lever.

9. The medical device of claim 1, wherein the actuator comprises a slide.

10. The medical device of claim 1, wherein at least a portion of the distal section of the elongated shaft defines a uniform radius of curvature.

11. The medical device of claim 1, wherein the handle is rigidly coupled to the shaft such that the shaft is readily manipulated via movement of the handle.

12. The medical device of claim 1, further comprising a sensor located at the distal section of the elongated shaft.

13. The medical device of claim 1, wherein the actuator is located at the handle.

14. The medical device of claim 1, wherein the proximal section includes an internal lumen.

15. The medical device of claim 1, wherein at least a portion of the shaft is malleable.

16. The medical device of claim 1, wherein the medical procedure is an ablation procedure.

17. A medical device for use in a medical procedure comprising:

a manually graspable, non-conductive handle;

an elongated shaft projecting from the handle, the shaft being sized and shaped to be positioned through a small incision in the chest of a patient and defining a proximal section comprising a rigid, elongated metal tube and a distal section comprising metal and a rounded tip portion adapted to be slid relative to tissue, the rounded tip portion being free of any electrode movable relative to the rounded tip portion, the shaft including a joint comprising a pin that moveably couples the distal section to the proximal section thereby allowing the distal section to pivot relative to the proximal section;

a non-conductive material surrounding at least a portion of the elongated shaft;

a remote actuator located at the handle for selectively controlling the actuation of the joint;

a power source comprising a battery;

a light located on the medical device and electrically coupled to the power source; and

an activator located at the handle for activating the delivery of power from the power source, wherein the light is visible when power is being delivered.