Thermal penetration and arc length controllable electrosurgical pencil

• US 8,235,987 B2
• Filed: 11/21/2008
• Issued: 08/07/2012
• Est. Priority Date: 12/05/2007
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Craig, Jason L.
• Primary Examiner(s): Desanto, Matthew F
• Application Number:
  US12/275,290
• Publication Number:
  US 20090149851A1
• Time in Patent Office: 1,355 Days
• Field of Search: 606 41- 52, 606/32, 606/34
• US Class Current: 606/41
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2018/00922 by switching or controlling the treatment energy directly within the hand-piece
• CPC Class Codes: A61B 2018/00946 slidable

Abstract

An electrosurgical pencil is provided, which includes an elongated housing, an electrocautery electrode supported within the housing and extending distally from the housing. The electrocautery electrode is connected to a source of electrosurgical energy. The pencil also includes at least one voltage divider network supported on the housing and electrically connected to the source of electrosurgical energy for controlling intensity, frequency, and/or mode of electrosurgical energy being delivered to the electrocautery electrode.

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 configured to connect to a source of electrosurgical energy; and

at least one voltage divider network supported on the housing, the at least one voltage divider network electrically connected to the source of electrosurgical energy and configured to transmit at least one characteristic signal to the source of electrosurgical energy for controlling at least one of a frequency, an intensity, and a mode of electrosurgical energy delivered by the source of electrosurgical energy to the electrocautery electrode, the at least one voltage divider network configured to control the frequency of the electrosurgical energy separately from the mode of the electrosurgical energy.

2. The electro surgical pencil according to claim 1, further including a plurality of activation switches supported on the housing, each activation switch configured to activate a particular mode of electrosurgical energy produced by the source of electrosurgical energy.

3. The electrosurgical pencil according to claim 2, wherein the at least one voltage divider network includes at least one slide potentiometer operatively supported on the housing.

4. The electrosurgical pencil according to claim 3, wherein the at least one slide potentiometer is configured to vary the frequency of electrosurgical energy delivered to the electrocautery electrode from a minimum of about 470 kHz to a maximum of about 1 MHz.

5. The electrosurgical pencil according to claim 4, wherein the at least one slide potentiometer is configured to adjust the frequency of a waveform duty cycle corresponding to a particular mode of the electrosurgical energy.

6. The electrosurgical pencil according to claim 5, wherein the at least one slide potentiometer is configured to provide a plurality of discreet frequency settings.

7. The electrosurgical pencil according to claim 5, wherein the at least one slide potentiometer has a first position corresponding to a minimum frequency, a second position corresponding to a maximum frequency and a plurality of positions between the first and second positions corresponding to frequencies between the minimum and the maximum frequency.

8. The electrosurgical pencil according to claim 4, wherein the at least one slide potentiometer is configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for varying the frequency of electrosurgical energy delivered to the electrocautery electrode.

9. The electrosurgical pencil according to claim 4, wherein the at least one slide potentiometer is configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for varying the frequency of a waveform duty cycle corresponding to a particular mode of the electrosurgical energy.

10. The electrosurgical pencil according to claim 3, wherein the at least one slide potentiometer is configured to control at least one of the intensity and the frequency of electrosurgical energy delivered to the electrocautery electrode.

11. The electrosurgical pencil according to claim 10, wherein the at least one slide potentiometer comprises at least one nub extending from a surface thereof, wherein the at least one nub is configured to contact the at least one voltage divider network and adjust the at least one characteristic signal transmitted by the at least one voltage divider network as the at least one slide potentiometer is moved relative to the housing.

12. The electrosurgical pencil according to claim 3, wherein the plurality of activation switches are configured to selectively actuate a first resistor network of the at least one voltage divider network, and wherein the at least one slide potentiometer is configured to selectively actuate at least one of a second resistor network and a third resistor network of the at least one voltage divider network.

13. The electrosurgical pencil according to claim 3, wherein the at least one slide potentiometer is set to a minimum when the at least one slide potentiometer is placed at a first position and is set to a maximum when the at least one slide potentiometer is placed at a second position.

14. The electrosurgical pencil according to claim 3, wherein the at least one slide potentiometer includes a pair of nubs slidably supported, one each, on either side of the plurality of activation switches such that the at least one slide potentiometer is operable from either side of the electrosurgical pencil.

15. The electrosurgical pencil according to claim 3, wherein the at least one slide potentiometer is configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the at least one of the intensity and the frequency of electro surgical energy delivered to the electrocautery electrode.

16. The electrosurgical pencil according to claim 1, wherein the at least one voltage divider network is rotatably supported on the housing.

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

18. The electro surgical pencil according to claim 1, wherein the plurality of activation switches are configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the mode of electrosurgical energy delivered to the elecrocautery electrode.

19. An electrosurgical pencil, comprising:

an elongated housing;

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

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 and configured to transmit at least one characteristic signal to the source of electrosurgical energy for controlling at least one of a frequency, a duty cycle, and an intensity of electrosurgical energy delivered to the electrocautery electrode by the source of electrosurgical energy; and

a frequency controller slidably supported on the housing and configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the frequency of the electrosurgical energy produced by the source of electrosurgical energy separately from the duty cycle.

20. The electrosurgical pencil according to claim 19, further comprising a plurality of activation switches supported on the housing and configured for selective engagement with the at least one voltage divider network, each activation switch configured to selectively complete a control loop extending from the source of electrosurgical energy to the at least one voltage divider network upon actuation thereof.

21. The electrosurgical pencil according to claim 20, wherein the plurality of activation switches define a first resistor network disposed within the housing, and wherein the frequency controller defines a second resistor network disposed within the housing.

22. The electrosurgical pencil according to claim 19, further comprising an intensity controller slidably supported on the housing, wherein the intensity controller is configured to selectively actuate the at least one voltage divider network and provide a tactile feedback to a user of the electrosurgical pencil as the intensity controller is moved relative to the housing.

23. The electrosurgical pencil according to claim 22, wherein the intensity controller is configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the intensity of the electrosurgical energy produced by the source of electrosurgical energy.

24. The electrosurgical pencil according to claim 19, wherein the frequency controller selectively actuates the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy which in turn transmits a corresponding waveform frequency to the electrocautery electrode.

25. The electrosurgical pencil according to claim 19, wherein the frequency controller has a first position corresponding to a minimum frequency of the electrosurgical energy, a second position corresponding to a maximum frequency of the electrosurgical energy and a plurality of positions between the first and second positions corresponding to frequencies between the minimum and the maximum frequency of the electrosurgical energy.

26. An electrosurgical pencil, comprising:

an elongated housing;

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

at least one voltage divider network supported on the housing, the at least one voltage divider network electrically connected to the source of electrosurgical energy and configured to transmit at least one characteristic signal to the source of electrosurgical energy for controlling at least one of a frequency, an intensity, and a mode of electrosurgical energy delivered to the electrocautery electrode by the source of electrosurgical energy, the voltage divider network configured to control the frequency of the electrosurgical energy separately from the mode of the electrosurgical energy;

a frequency controller slidably supported on the housing and configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the frequency of the electrosurgical energy;

an intensity controller slidably supported on the housing and configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the intensity of the electrosurgical energy separately from the mode of the electrosurgical energy; and

a plurality of activation switches supported on the housing, the plurality of activation switches configured to selectively actuate the at least one voltage divider network to transmit the at least one characteristic signal to the source of electrosurgical energy for controlling the mode of electrosurgical energy, each activation switch corresponding to a particular mode of electrosurgical energy produced by the source of electrosurgical energy.

27. An electrosurgical pencil, comprising:

an elongated housing;

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

a voltage divider network supported by the housing and electrically connected to the source of electrosurgical energy, the voltage divider network configured to transmit at least one characteristic signal to the source of electrosurgical energy upon actuation thereof for controlling electrosurgical energy delivered to the electrocautery electrode by the source of electrosurgical energy;

at least one duty cycle controller supported on the housing and operably coupled to the voltage divider network, the at least one duty cycle controller configured to actuate the voltage divider network to select a duty cycle of the electrosurgical energy delivered to the electrocautery electrode; and

a frequency controller supported on the housing and operably coupled to the voltage divider network, the frequency controller configured to actuate the voltage divider network to adjust the frequency of the electrosurgical energy delivered to the electrocautery electrode for each selected duty cycle.