Electrosurgical pencil with advanced ES controls

• US 7,879,033 B2
• Filed: 01/24/2006
• Issued: 02/01/2011
• Est. Priority Date: 11/20/2003
• Status: Expired due to Fees

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Behnke, Robert, Schmaltz, Dale F., Podhajsky, Ronald J., Sartor, Joe D., Huseman, Mark J., Heard, David N., Buysse, Steven P., Ehr, Chris J., Reschke, Arlan J.
• Primary Examiner(s): Sweet; Thomas J
• Assistant Examiner(s): DELLA, JAYMI E
• Application Number:
  US11/337,990
• Publication Number:
  US 20060178667A1
• Time in Patent Office: 1,834 Days
• Field of Search: 606/34, 606/46, 606/49, 606/45
• US Class Current: 606/45
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2018/00726 Duty cycle
• CPC Class Codes: A61B 2018/00827 Current
• 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 system is provided that includes an electrosurgical generator; and an electrosurgical pencil selectively connectable to the electrosurgical generator. The electrosurgical pencil includes an elongated housing; at least one electrocautery end effector removably supportable within the housing and extending distally from the housing, the electrocautery end effector being connected to the electrosurgical generator; and at least one voltage divider network supported on the housing. The at least one voltage divider network is electrically connected to the electrosurgical generator and controls at least one of the intensity of electrosurgical energy being delivered to the electrosurgical pencil and the mode of electrosurgical energy being delivered to the electrosurgical pencil. The voltage divider network generates a plurality of characteristic voltages which are measurable by the electrosurgical generator and which electrosurgical generator in turn transmits a corresponding waveform duty cycle at a particular intensity to the electrocautery end effector of the electrosurgical pencil.

Claims

1. An electrosurgical pencil, comprising:

an elongated housing;

at least one type of electrocautery end effector removably supportable within the housing and extending distally from the housing, the electrocautery end effector being connected to a source of electrosurgical energy adapted for use with multiple types of electrocautery end effectors that are configured to operate within a corresponding range setting of energy;

a plurality of activation switches supported on the housing for controlling the amount of electrosurgical energy transmitted to the at least one electrocautery end effector;

an intensity controller supported on the housing and configured to adjust power parameters associated with the transmitted electrosurgical energy; and

a single selector independently operable from each of the plurality of activation switches and the intensity controller and supported on the housing for selecting a range setting of energy to be delivered from the source of electrosurgical energy to the at least one type of electrocautery end effector, wherein the selector is actuatable to select one of a plurality of range settings of energy corresponding to a selected one of the multiple types of electrocautery end effectors connected to the housing,

wherein the selector is configured such that when the selector is pressed, the selector cycles through the plurality of range settings of energy until an appropriate range setting is achieved for the at least one type of electrocautery end effector such that the at least one type of electrocautery end effector is operable within that range setting of energy associated therewith.

2. The electrosurgical pencil according to claim 1, wherein the selector is at least one of a button depressably supported on the housing or a collet rotatably supported on the housing, wherein the range settings are selected by at least one of depressing the button and rotating the collet.

3. The electrosurgical pencil according to claim 2, wherein each activation switch is configured and adapted to selectively complete a control loop extending from the source of electrosurgical energy upon actuation thereof.

4. The electrosurgical pencil according to claim 3, wherein actuation of at least one of the plurality of activation switches produces a division with hemostatic effect at the electrocautery end effector.

5. The electrosurgical pencil according to claim 4, further comprising 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 and in electrical communication with the intensity controller and the plurality of activation switches for respectively controlling at least one of an intensity of electrosurgical energy being delivered to the electrosurgical pencil and a mode of electrosurgical energy being delivered to the electrosurgical pencil.

6. The electrosurgical pencil according to claim 5, wherein the selector is operatively connected to the voltage divider network.

7. The electrosurgical pencil according to claim 6, wherein the division with hemostatic effect is transmitted in discrete packets of energy.

8. The electrosurgical pencil according to claim 7, wherein the energy packet has a substantially instantaneous amplification.

9. The electrosurgical pencil according to claim 8, wherein the energy packet has a substantially instantaneous degradation.

10. The electrosurgical pencil according to claim 6, wherein the housing defines an open distal end for selectively receiving a proximal end of the electrocautery end effector therein, and wherein the open distal end of the housing has a non-circular inner profile.

11. The electrosurgical pencil according to claim 10, further comprising a collar operatively supporting the electrocautery end effector, the collar having a shaped outer surface complementing the shaped inner profile of the distal open end of the housing.

12. The electrosurgical pencil according to claim 11, wherein the collar and the inner profile of the distal open end of the housing have complementary ovular, triangular, rectangular, hexagonal, toothed, multi-faceted profiles.

13. The electrosurgical pencil according to claim 12, further comprising an end effector receptacle configured and adapted to selectively engage a proximal end of the electrocautery end effector.

14. The electrosurgical pencil according to claim 6, further comprising a stabilizer operatively disposed within the housing for increasing retention forces acting on the proximal end of the electrocautery end effector, the stabilizer defining a passage therein configured and adapted to selectively receive a proximal end of the electrocautery end effector.

15. The electrosurgical pencil according to claim 14, wherein the stabilizer is fabricated from a compliant polymeric material.

16. The electrosurgical pencil according to claim 6, wherein the at least one voltage divider network being electrically connected to the source of electrosurgical energy for controlling the intensity of electrosurgical energy being delivered to the plurality of activation switches from the source of electrosurgical energy and for controlling the intensity of electrosurgical energy delivered to the plurality of activation switches returning from the electrocautery end effector, the at least one voltage divider network comprises at least one return control wire electrically inter-connecting the electrocautery end effector and the source of electrosurgical energy, the return control wire transmitting excess electrosurgical energy from the electrocautery end effector to the source of electrosurgical energy.

17. The electrosurgical pencil according to claim 16, wherein the intensity controller includes a slide potentiometer that is supported on the housing and in operative communication with the voltage divider network and movable therealong.

18. The electrosurgical pencil according to claim 17, wherein the plurality of activation switches define a first resistor network disposed within the housing, and wherein the slide potentiometer defines a second resistor network disposed within the housing.

19. The electrosurgical pencil according to claim 18, wherein the slide potentiometer simultaneously controls the intensity of electrosurgical energy delivered to the plurality of activation switches such that the intensity of electrosurgical energy delivered to the plurality of activation switches is equal to a value of the intensity controller.

20. The electrosurgical pencil according to claim 19, wherein at least one activation switch is configured and adapted to control a waveform duty cycle to achieve a desired surgical intent.

21. The electrosurgical pencil according to claim 20, further including three mode activation switches supported on the housing.

22. The electrosurgical pencil according to claim 21, wherein each mode activation switch, when actuated, generates a characteristic voltage which is measured by the source of electrosurgical energy, the source of electrosurgical energy in turn transmits a corresponding waveform duty cycle to the electrosurgical pencil to perform an electrosurgical procedure.

23. The electrosurgical pencil according to claim 21, wherein a first activation switch, when actuated, generates a first characteristic voltage measured by the source of electrosurgical energy, the source of electrosurgical energy in turn transmits a waveform duty cycle which produces a cutting effect;

a second activation switch, when actuated, generates a second characteristic voltage measured by the source of electrosurgical energy, the source of electrosurgical energy in turn transmits a waveform duty cycle which produces a division with hemostatic effect; and

wherein a third activation switch, when actuated, generates a third characteristic voltage measured by the source of electrosurgical energy, the source of electrosurgical energy in turn transmits a waveform duty cycle which produces a coagulating effect.

24. The electrosurgical pencil according to claim 5, wherein the voltage divider network is a potentiometer.

25. The electrosurgical pencil according to claim 24, further including a molded hand grip operatively supported on the housing.

26. The electrosurgical pencil according to claim 25, wherein the hand grip is shaped and dimensioned to reduce fatigue on the hand of the user.

27. The electrosurgical pencil according to claim 26, further comprising:

indicia provided on the housing indicating a level of intensity of the energy being delivered to the electrocautery end effector.

28. The electrosurgical pencil according to claim 27, wherein the indicia is located along a path of travel of the slide potentiometer.

29. The electrosurgical pencil according to claim 1, wherein the selector is an optical fiber including a distal end supported in the housing for reading a light intensity from a proximal end of the electrocautery end effector when the electrocautery end effector is connected to the housing.

30. The electrosurgical pencil according to claim 29, wherein a proximal end of each electrocautery end effector includes a unique color associated therewith, wherein each color produces a different light intensity.

31. The electrosurgical pencil according to claim 30, wherein when the electrocautery end effector is connected to the housing, the optical fiber transmits the light intensity to the electrosurgical generator.

32. The electrosurgical pencil according to claim 31, wherein the electrosurgical generator adjusts the range settings based on the light intensity transmitted thereto.