Circuitry for processing requests made from the sterile field of a surgical procedure to change the output power level of an electrosurgical generator

• US 4,632,109 A
• Filed: 12/11/1984
• Issued: 12/30/1986
• Est. Priority Date: 12/11/1984
• Status: Expired due to Term

• Current Assignee: Sherwood Services AG
• Original Assignee: Valleylab Inc. (Medtronic Plc)
• Inventors: Paterson, William G.
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): Shay, David
• Application Number:
  US06/680,966
• Time in Patent Office: 749 Days
• Field of Search: 128/6, 128/303.1, 128/303.12, 128/303.13, 128/303.14, 128/303.15, 128/303.17, 128/303.18
• US Class Current: 606/39
• 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 2018/00934 the signal being non electric, e.g. pneumatic, hydraulic, optical
• CPC Class Codes: A61B 2018/00958 for switching between different working modes of the main function

Abstract

An electrosurgical generating system including an electrosurgical generator; a handpiece including an active electrode connected to the generator for applying electrosurgical current from the generator to a patient; and an initializing device or circuit for making an initial determination as to whether the handpiece includes power changing switches for changing the level of the output power delivered from the generator to the patient. Assuming the handpiece does include such switches, circuitry is also disclosed for limiting the amount the power can be increased or decreased from the handpiece. Also circuitry is disclosed for effecting the power increase or decrease in incremental steps.

Claims

1. An electrosurgical generating system comprising:

an electrosurgical generator;

a handpiece including (a) an active electrode connected to said generator for applying electrosurgical current from the generator to a patient and (b) power changing means for changing the level of output power delivered from the generator to the patient; and

initializing means responsive to said power changing means for making an initial determination that said handpiece includes said power changing means and thus permit said power changing means to change said output power level only if said handpiece includes said power changing means.

2. A system as in claim 1 where said means for changing the output power level of the generator includes a pair of switches, one power increment switch for effecting an increase in the output power level of the generator and the other a power decrement switch for effecting a decrease thereof.

3. A system as in claim 2 where said initializing means includes one of said switches.

4. A system as in claim 3 where said initializing means includes said power increment switch.

5. A system as in claim 1 including means for preventing changes in the output power once the power has been changed a predetermined amount.

6. A system as in claim 1 including means for changing the output power level of the generator by a plurality of successive, incremental amounts.

7. A system as in claim 6 including further power changing means for changing the output power level of the generator, said further means being disposed at the generator and where said means for changing said output level by a plurality of incremental amounts includes means for incrementing the current output power level by a predetermined percentage of the power level last set by the further power changing means at the electrosurgical generator.

8. A system as in claim 7 where said means for incrementing the current output power level by a predetermined percentage includes means for establishing said predetermined percentage as ten percent.

9. An electrosurgical generating system comprising:

an electrosurgical generator;

a handpiece including an active electrode connected to said electrosurgical generator for applying electrosurgical current from the generator to a patient, said handpiece having means disposed thereat for changing the level of the output power delivered from said generator to said patient;

initializing means responsive to said power changing means for making an initial determination that said handpiece includes said power changing means and thus permit said power changing means to change said output power level only if said handpiece includes said power changing means;

means for changing the output power level of the generator by a plurality of successive, incremental amounts;

means for preventing changes in the output power level once the power has been changed a predetermined amount by said power changing means; and

further power changing means for changing the output power level of the generator, said further means being disposed at the generator and where said means for changing said output power level by a plurality of incremental amounts includes means for incrementing the current output power level by a predetermined percentage of the power level last set by the further power changing means at the electrosurgical generator.