Electrosurgical pencil with improved controls

• US 7,959,633 B2
• Filed: 12/18/2006
• Issued: 06/14/2011
• Est. Priority Date: 11/20/2003
• Status: Active Grant

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Buysse, Steven Paul, Huseman, Mark, Reschke, Arlen James, Schmaltz, Dale Francis, Heard, David Nichols, Podhajsky, Ronald J., Sartor, Joe Don
• Primary Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US11/640,673
• Publication Number:
  US 20070093810A1
• Time in Patent Office: 1,639 Days
• Field of Search: 606 32- 34, 606 38- 41, 606 45- 50
• US Class Current: 606/45
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2018/00928 by sending a signal to an external energy source
• CPC Class Codes: A61B 2018/00946 slidable

Abstract

An electrosurgical pencil is provided which includes an elongated housing, an electrocautery blade supported within the housing and extending distally from the housing. The electrocautery blade is connected to a source of electrosurgical energy. The pencil also includes at least one activation switch supported on the housing which is configured and adapted to complete a control loop extending from the source of electrosurgical energy. At least one voltage divider network is also supported on the housing and is electrically connected to the source of electrosurgical energy.

Claims

1. An electrosurgical pencil, comprising:

an elongated housing;

an electrocautery electrode supported within the housing and extending distally from the housing, the electrocautery electrode electrically connected to a source of electrosurgical energy;

a plurality of activation switches supported on the housing, each activation switch being configured to selectively complete a control loop extending from the source of electrosurgical energy upon actuation thereof; and

at least one voltage divider network supported on the housing, the at least one voltage divider network operable to electrically connect to the source of electrosurgical energy for controlling at least one of an intensity and a mode of electrosurgical energy being delivered to the electrocautery electrode.

2. The electrosurgical pencil according to claim 1, wherein the at least one voltage divider network further comprises:

a plurality of control wires operable to electrically inter-connect the respective activation switch to the source of electrosurgical energy, each control wire being isolated within the electrosurgical pencil from a transmission wire delivering electrosurgical energy to the electrocautery electrode.

3. The electrosurgical pencil according to claim 1, further comprising a slide operatively supported on the housing and associated with the at least one voltage divider network.

4. The electrosurgical pencil according to claim 3, wherein the plurality of activation switches are each operatively associated with the at least one voltage divider network.

5. The electrosurgical pencil according to claim 4, wherein the slide is operable to control the intensity of electrosurgical energy of the mode delivered to the electrocautery electrode.

6. The electrosurgical pencil according to claim 1, wherein each activation switch is configured to activate a particular waveform duty cycle to achieve a desired surgical intent.

7. The electrosurgical pencil according to claim 6, wherein each waveform duty cycle varies with a change in intensity.

8. The electrosurgical pencil according to claim 1, wherein each activation switch is configured to complete a respective electrical path of the at least one voltage divider network upon activation thereof, the respective electrical path operable to produce a respective voltage monitored by the source of electrosurgical energy.

9. The electrosurgical pencil according to claim 8, wherein a first activation switch is configured to complete a first electrical path to be monitored by the electrosurgical energy source which, in turn, transmits a first waveform duty cycle;

wherein a second activation switch completes a second electrical path to be monitored by the electrosurgical energy source which, in turn, transmits a second waveform duty cycle; and

wherein a third activation switch completes a third electrical path to be monitored by the electrosurgical energy source which, in turn, transmits a third waveform duty cycle.

10. The electrosurgical pencil according to claim 9, wherein each of the first, second and third waveform duty cycles is operable to produce one of a cutting, blending and coagulating effect.

11. The electrosurgical pencil according to claim 5, wherein the slide is movable to a plurality of discrete locations each corresponding to a respective intensity setting.

12. The electrosurgical pencil according to claim 3, wherein the source of electrosurgical energy is operable to deliver a waveform having a minimum intensity when the slide is placed at a proximal-most position relative to the at least one voltage divider network, and wherein the source of electrosurgical energy is operable to deliver a waveform having a maximum intensity when the slide is placed at a distal-most position relative to the at least one voltage divider network.

13. The electrosurgical pencil system according to claim 3, wherein the source of electrosurgical energy is operable to deliver a waveform having a maximum intensity when the slide is placed at a proximal-most position relative to the at least one voltage divider network, and wherein the source of electrosurgical energy is operable to deliver a waveform having a minimum intensity when the slide is placed at a distal-most position relative to the at least one voltage divider network.

14. The electrosurgical pencil according to claim 1, wherein the at least one voltage divider network is configured to provide a plurality of discreet intensity settings.

15. The electrosurgical pencil according to claim 1, wherein the at least one voltage divider network is configured to provide analog intensity settings.

16. The electrosurgical pencil according to claim 1, further comprising a plurality of intensity control slides positioned on the body for respective activation switches.

17. An electrosurgical pencil, comprising:

an elongated housing;

an electrocautery electrode supported within the housing and extending distally from the housing, the electrocautery electrode electrically connected to a source of electrosurgical energy;

a plurality of activation switches supported on the housing, each activation switch being configured to activate a particular mode of electrosurgical energy produced by the source of electrosurgical energy; and

at least one voltage divider network supported on the housing, the at least one voltage divider network operable to electrically connect to the source of electrosurgical energy for controlling an intensity of electrosurgical energy being delivered to the electrocautery electrode, wherein a mode of electrosurgical energy varies with a change in intensity produced by the at least one voltage divider network.

18. The electrosurgical pencil of claim 17, wherein the elongated housing includes a recess formed in an outer surface thereof, and wherein the plurality of activation switches are disposed within the recess.

19. An electrosurgical system, comprising:

a source of electrosurgical energy; and

a pencil operatively connected to the source of electrosurgical energy, the pencil including;

an elongated housing;

an electrocautery electrode supported within the housing and extending distally from the housing, the electrocautery electrode electrically connected to the source of electrosurgical energy;

a plurality of activation switches supported on the housing, each activation switch being configured to activate a particular mode of electrosurgical energy produced by the source of electrosurgical energy; and

at least one voltage divider network supported on the housing, the at least one voltage divider network being electrically connected to the source of electrosurgical energy for controlling an intensity of electrosurgical energy being delivered to the electrocautery electrode, wherein a mode of electrosurgical energy varies with a change in intensity produced by the at least one voltage divider network.