Power level control apparatus for electrosurgical generators

• US 5,626,575 A
• Filed: 04/28/1995
• Issued: 05/06/1997
• Est. Priority Date: 04/28/1995
• Status: Expired due to Term

• Current Assignee: Conmed Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: Conmed Corporation (Jefferies Financial Group, Inc.)
• Inventors: Crenner, James C.
• Primary Examiner(s): Shay, David M.
• Application Number:
  US08/431,013
• Time in Patent Office: 739 Days
• Field of Search: 606/34-52
• US Class Current: 606/34
• CPC Class Codes: A61B 18/12 by passing a current through the tissue to be heated, e.g. high-frequency current
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 2018/0066 without feedback, i.e. open loop control
• CPC Class Codes: A61B 2018/00761 Duration
• CPC Class Codes: A61B 2018/00886 Duration
• CPC Class Codes: A61B 2018/00928 by sending a signal to an external energy source
• CPC Class Codes: H01H 2300/054 Application timeslot: duration of actuation or delay between or combination of subsequent actuations determines selected function

Abstract

An electrosurgical generator system includes an electrosurgical handpiece including an active electrode for receiving electrosurgical power from a generator, and cut and coagulation mode switches and a foot activated switch device also including cut and coagulation mode switches. A signal processor associated with the generator and connected to the handpiece and foot activated switch device monitors the states of the cut and coagulation mode switches so as to detect activation of any of these switches and, responsive to two successive activations of a single switch of the switches being monitored, provides control of the power produced by the electrosurgical generator by further activation of the single switch.

Claims

1. An electrosurgical generator system, said system comprising:

an electrosurgical generator for producing electrosurgical power,

an electrosurgical handpiece including an active electrode for receiving said electrosurgical power from said generator, a first coagulation mode switch connected to said electrosurgical generator, for, when in an activated state, providing a coagulation mode of operation of said generator, and a first cut mode switch connected to said electrosurgical generator for, when in an activated state, providing a cut mode of operation of said generator, and

a foot activated switch device including a second coagulation mode switch connected to said electrosurgical generator for, when in an activated state, providing said coagulation mode of operation of said generator and a second cut mode switch connected to said electrosurgical generator for, when in an activated state, providing said cut mode of operation of said generator,

said generator including signal processing means connected to said handpiece and said foot activated switch device for monitoring for the activated state of at least one switch of said first and second coagulation mode switches and said first and second cut mode switches so as to detect any activation of the at least one switch being monitored, and for, responsive to at least two successive activations of only a single switch of the at least one switch being monitored, providing control of the power produced by said electrosurgical generator by further activation of said single switch.

2. A system as claimed in claim 1, wherein said signal processing means monitors the activated state of all of said switches.

3. A system as claimed in claim 2, wherein said electrosurgical generator includes a plurality of incremental power settings ranging between a maximum setting and a minimum setting, and said signal processing means determines whether said single switch is a coagulation mode switch or a cut mode switch and provides for, responsive to said single switch being a cut mode switch, incrementing an existing power setting if that setting is less than said maximum setting and for, responsive to said single switch being a coagulation mode switch, decrementing the existing power setting if that setting is greater than said minimum setting.

4. A system as claimed in claim 2, further comprising tone generator means, controlled by said signal processing means, for generating a first tone when said single switch is a cut mode switch and for generating a second tone when said single switch is a coagulation mode switch.

5. A system as claimed in claim 2 wherein said signal processing means executes a test sequence prior to providing control of the power produced by said generator wherein activation of said coagulation mode switches and cut mode switches are monitored, said signal processing means canceling said test sequence when activation of a said switch does not meet a predetermined requirement.

6. A system as claimed in claim 5, wherein said signal processing means includes timing means controlled so as to measure time periods during which said switches are activated, said signal processing means canceling said test sequence when a measured time period during a said switch is activated falls outside of a predetermined time limit.

7. A system as claimed in claim 5, wherein said signal processing means includes timing means controlled so as to measure time periods between which said switches are activated, said signal processing means canceling said test sequence when a measured time period between activations of a said switch falls outside of a predetermined time limit.

8. A system as claimed in claim 5, wherein said signal processing means includes timing means controlled so as to measure time periods during which and between which said switches are activated, said signal processing means canceling said test sequence when a measured time period during a said switch is activated falls outside of a predetermined time limit or when a measured time period between activations of a said switch falls outside of a predetermined time limit.

9. An electrosurgical generator system, said system comprising:

an electrosurgical generator for producing electrosurgical power,

an electrosurgical handpiece including an active electrode for receiving said electrosurgical power from said generator, a first coagulation mode switch connected to said electrosurgical generator for, when activated, providing a coagulation mode of operation of said generator, and a first cut mode switch connected to said electrosurgical generator for, when activated, providing a cut mode of operation of said generator, and

a foot activated switch device including a second coagulation mode switch connected to said electrosurgical generator for, when activated, providing said coagulation mode of operation of said generator and a second cut mode switch connected to said electrosurgical generator for, when activated, providing said cut mode of operation of said generator,

said generator including signal processing means connected to said handpiece and said foot activated switch device for monitoring said first and second coagulation mode switches and said first and second cut mode switches so as to detect any activation of said switches, and for, responsive to at least two successive activations of only a single switch of said switches, providing a power adjustment mode wherein the power produced by said electrosurgical generator can be controlled by further activation of said single switch.

10. A system as claimed in claim 9, wherein said electrosurgical generator includes a plurality of incremental power settings ranging between a maximum setting and a minimum setting, and said signal processing means determines whether said single switch is a coagulation mode switch or a cut mode switch and provides for, responsive to said single switch being a cut mode switch, incrementing an existing power setting existing when said power adjustment mode is provided if that setting is less than said maximum setting and for, responsive to said single switch being a coagulation mode switch, decrementing the existing power setting if that setting is greater than said minimum setting.

11. A system as claimed in claim 9, further comprising tone generator means, controlled by said signal processing means, for generating a first tone when said power adjustment mode is entered, for generating a second tone during said power adjustment mode when said single switch is a cut mode switch and for generating a third tone during said power adjustment mode when said single switch is a coagulation mode switch.

12. A system as claimed in claim 9 wherein said signal processing means executes a power adjustment mode test sequence prior to entering said power adjustment mode wherein activation of said coagulation mode switches and cut mode switches are monitored, said signal processing means canceling said test sequence when activation of a said switch does not meet a predetermined requirement.

13. A system as claimed in claim 12, wherein said signal processing means includes timing means controlled so as to measure time periods during which said switches are activated, said signal processing means canceling said power adjustment mode test sequence when a measured time period during a said switch is activated falls outside of a predetermined time limit.

14. A system as claimed in claim 12, wherein said signal processing means includes timing means controlled so as to measure time periods between which said switches are activated, said signal processing means canceling said power adjustment mode test sequence when a measured time period between activations of a said switch falls outside of a predetermined time limit.

15. A system as claimed in claim 12, wherein said signal processing means includes timing means controlled so as to measure time periods during which, and between which, said switches are activated, said signal processing means canceling said power adjustment mode test sequence when a measure time period during which a said switch is activated falls outside of a predetermined time limit or when a measured time period between activations of a said switch falls outside of a predetermined time limit.

16. An electrosurgical generator system, said system comprising:

an electrosurgical generator for producing electrosurgical power,

an electrosurgical handpiece including an active electrode for receiving said electrosurgical power from said generator, a first coagulation mode switch connected to said electrosurgical generator for, when activated, providing a coagulation mode of operation of said generator, and a first cut mode switch connected to said electrosurgical generator for, when activated, providing a cut mode of operation of said generator, and

a foot activated switch device including a second coagulation mode switch connected to said electrosurgical generator for, when activated, providing said coagulation mode of operation of said generator and a second cut mode switch connected to said electrosurgical generator for, when activated providing said cut mode of operation of said generator,

said generator including signal processing means connected to said handpiece and said foot activated switch device for monitoring said first and second coagulation mode switches and said first and second cut mode switches so as to detect any activation of said switches, and for, responsive to at least two successive activations of only a single switch of said switches, providing entry from a normal mode into a power adjustment mode wherein the power produced by said electrosurgical generator can be controlled by further activation of said single switch, and for providing return to said normal mode from said power adjustment mode responsive to at least two further successive activations of said single switch.

17. A system as claimed in claim 16, wherein said electrosurgical generator includes a plurality of incremental power settings ranging between a maximum setting and a minimum setting, and said signal processing means determines whether said single switch is a coagulation mode switch or a cut mode switch and provides for, responsive to said single switch being a cut mode switch, incrementing an existing power setting existing when said power adjustment mode is provided if said setting is less than said maximum setting and for, responsive to said single switch being a coagulation mode switch, decrementing the existing power setting if that setting is greater than said minimum setting.

18. A system as claimed in claim 16, further comprising tone generator means, controlled by said signal processing means, for generating a first tone when said power adjustment is entered, for generating a second tone during said power adjustment mode when said single switch is a cut mode switch and for generating a third tone during said power adjustment mode when said single switch is a coagulation mode switch.

19. A system as claimed in claim 16 wherein said signal processing means executes a power adjustment mode test sequence prior to entering said power adjustment mode wherein activation of said coagulation mode switches and cut mode switches are monitored, said signal processing means canceling said test sequence when activation of a said switch does not meet a predetermined requirement.

20. A system as claimed in claim 18, wherein said signal processing means includes timing means controlled so as to measure time periods during which said switches are activated, said signal processing means canceling said power adjustment mode test sequence when a measured time during a said switch is activated falls outside of a predetermined time limit.

21. A system as claimed in claim 18, wherein said signal processing means includes timing means controlled so as to measure time periods between which said switches are activated, said signal processing means canceling said power adjustment mode test sequence when a measured time period between activations of a said switch falls outside of a predetermined time limit.

22. A system as claimed in claim 18, wherein said signal processing means includes timing means controlled so as to measure time periods during which and between which said switches are activated, said signal processing means canceling said power adjustment mode test sequence when a measured time period during which a switch is activated falls outside of a predetermined time limit or when a measured time between activations of a said switch falls outside of a predetermined time limit.