Moveable switchable electrosurgical handpiece

• US 5,472,442 A
• Filed: 03/23/1994
• Issued: 12/05/1995
• Est. Priority Date: 03/23/1994
• Status: Expired due to Term

• Current Assignee: Sherwood Services AG
• Original Assignee: Valleylab Inc. (Medtronic Plc)
• Inventors: Klicek, Michael S.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US08/216,901
• Time in Patent Office: 622 Days
• Field of Search: 606/37-42, 606/45-50, 606/51, 606/52
• US Class Current: 606/42
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• 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 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/00916 with means for switching or controlling the main function of the instrument or device
• CPC Class Codes: A61B 2018/00958 for switching between different working modes of the main function
• CPC Class Codes: A61B 2018/1253 monopolar
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/1425 Needle

Abstract

An active electrode switches from a monopolar mode extending from a handpiece and a patient return to a bipolar mode with the active and return electrodes extending. An active lead selectively connects the active output and the active electrode. A return lead selectively connects the return electrode and the return output in the monopolar mode or the return terminal when in the bipolar mode. Terminals connect with wiring to the electrodes to complete the circuit for the bipolar mode. One terminal is on the generator and one is in the handpiece to connect to the electrodes and complete the circuit for bipolar. The electrode has a control on the handpiece for the surgeon to change circuitry and to position the electrode for each mode. The return electrode in the monopolar mode is in the handpiece disconnected from its terminal. The return electrode connects to its terminal when extended from the handpiece but for monopolar a pair of patient pads connected to a monitoring circuit test continuity. A method of use has steps of switching the electrode from the monopolar to bipolar, providing the generator with outputs to the electrodes, having terminals for the electrodes when used for bipolar, including an active lead selectively in circuit between the active output and electrode and including a return lead selectively in circuit between the return electrode and output when monopolar or the terminal when bipolar.

Claims

1. An electrosurgical system with a circuit having an electrosurgical generator with at least a pair of monopolar active and return outputs for supplying electrosurgical energy to electrodes in a first monopolar mode, and a pair of bipolar terminals electrically coupled to the electrosurgical generator for supplying electrosurgical energy to electrodes when used in a second bipolar mode, the electrosurgical system for a surgeon to use on a surgical site comprising:

a handpiece for the surgeon to hold;

a moveable switchable electrode extendably carried on the handpiece for motion relative thereto which moveable switchable electrode is switchable when extended by the surgeon to act as a return electrode positionable relative to and active electrode to effect the operational site when positioned therebetween;

an active electrode carried on the handpiece;

a return attached to the patient for use in the first monopolar mode;

means for mounting the moveable switchable electrode on the handpiece for allowing switching the moveable switchable electrode from the first monopolar mode with an active electrode carried extending from the handpiece and the return attached to the patient, to the second bipolar mode in which the active electrode and return electrode extend from the handpiece in position relative to each other to effect the operational site thereby;

an active lead selectively in circuit between the active output and the active electrode, and

a return lead selectively in circuit between the return attached to the patient and the return output when in the first monopolar mode or the return terminal and the return electrode when in the second bipolar mode so the moveable switchable electrode may be modified at the handpiece by the surgeon to function in either the first monopolar mode or second bipolar mode from the first monopolar mode with an active electrode carried extending from the handpiece and a return attached to the patient to a second bipolar mode in which the active electrode and return electrode extend from the handpiece in position relative to each other to effect the operational site thereby.

2. The electrosurgical system of claim 1 wherein the pair of bipolar terminals are on the electrosurgical generator and one is selectively connected through wiring to the return for the first monopolar mode or the return electrode in the handpiece to complete the circuitry for the second bipolar mode.

3. The electrosurgical system of claim 1 wherein at least one of the pair of bipolar terminals is physically positioned on the electrosurgical generator and the other terminal is located within the handpiece for selective connection to either the return for the first monopolar mode or the return electrode to complete the circuitry for the second bipolar mode.

4. The electrosurgical system of claim 1 wherein the moveable switchable electrode has a control on the handpiece that is accessible by the surgeon, the control permits selective changes in circuitry and allows positioning the moveable switchable electrode for conversion between the first monopolar mode and the second bipolar mode.

5. The electrosurgical system of claim 3 wherein the control joins to the return electrode, and the control and the return electrode are moveably supported on the handpiece to function as a unit, the return electrode during the first monopolar mode is positioned inside the handpiece and is disconnected from its terminal therein, the return electrode connects to its terminal therein when extended outside the handpiece into a position adjacent to the active electrode by the surgeon'"'"'s use of the control.

6. The electrosurgical system of claim 1 wherein the return electrode is a pair of pads in the first monopolar mode, the pair pads for attachment to the patient, each of the pads are separately connected to a monitoring circuit for testing continuity between each pad and the patient.

7. The electrosurgical system of claim 1 wherein the handpiece includes an elongated support extending distally for use within laparoscopic or endoscopic settings including trocars, body cavities or body orifices.

8. A method of using an electrosurgical system with a circuit having an electrosurgical generator with at least a pair of monopolar outputs for supplying electrosurgical energy to electrodes and a pair of bipolar terminals on the electrosurgical generator for supplying electrosurgical energy to electrodes when used in the second bipolar mode, the electrosurgical system for a surgeon to use on a surgical site for surgery comprising steps of:

providing a handpiece having a moveable switchable electrode for delivery of high frequency electrosurgical energy to an operational site on a patient;

switching the moveable switchable electrode from a first monopolar mode with an active electrode carried extending from the handpiece and a return electrode attached to the patient to a second bipolar mode in which the active electrode and an idle return electrode extends from the handpiece in position relative to each other to effect the operational site thereby;

including an active lead selectively in circuit between the active output and the active electrode, and

including a return lead selectively in circuit between the return electrode and the return output when in the first monopolar mode or the return terminal when in the second bipolar mode so the moveable switchable electrode may be modified at the handpiece by the surgeon to function in either the first monopolar mode or second bipolar mode by selective connection of the return electrode or the idle electrode.

9. An electrosurgical accessory for use with an electrosurgical generator supplying high frequency electrosurgical energy through an active electrode and an electrical return, for use by a surgeon for electrosurgical treatment of a patient'"'"'s operational site, the accessory comprising:

a handpiece having a switchable electrode for connection of high frequency electrosurgical energy to an operational site on a patient, which switchable electrode is switchable from a first monopolar mode with the active electrode carried extending from the handpiece and the electrical return attached to the patient, to a second bipolar mode wherein the electrical return is the switchable electrode;

a switching means locate on the handpiece allowing the electrosurgical accessory to be used in a first monopolar mode between the active electrode and the electrical return, or an a second bipolar mode wherein the active electrode and the switchable electrode extend for bipolar use.

10. The electrosurgical accessory of claim 9 wherein the switchable electrode has a control on the handpiece and accessible by the surgeon which control permits selective changes in circuitry of the switchable electrode for conversion between the first monopolar mode and the second bipolar mode.