High frequency power source

• US 20070282322A1
• Filed: 08/08/2007
• Published: 12/06/2007
• Est. Priority Date: 12/28/2000
• Status: Active Grant

• Current Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Original Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Inventors: Sawicz, Conrad, Lubock, Paul, Kussman, Dan, Quick, Richard, Dabney, James
• Granted Patent: US 8,764,741 B2
• Time in Patent Office: Days
• US Class Current: 606/39
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1233 with circuits for assuring patient safety
• CPC Class Codes: A61B 18/16 Indifferent or passive electrodes for grounding
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/00607 Coagulation and cutting with the same instrument
• CPC Class Codes: A61B 2018/00666 using a threshold value
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00726 Duty cycle
• CPC Class Codes: A61B 2018/00827 Current
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2018/00892 Voltage
• CPC Class Codes: A61B 2018/00898 Alarms or notifications created in response to an abnormal condition
• CPC Class Codes: A61B 2018/0094 Types of switches or controllers
• CPC Class Codes: A61B 2018/1213 creating an arc
• CPC Class Codes: A61B 2018/1266 with DC current output
• CPC Class Codes: A61B 2018/1286 having a specific transformer
• CPC Class Codes: A61B 2018/162 located on the probe body

Abstract

A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Claims

1. A high frequency electrosurgical system comprising:

a. an electrical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz; and

b an electrosurgical tool configured to receive the electrical power from the generator and deliver the power to an electrosurgical site.

2-78. -78. (canceled)

79. An electrosurgical tissue cutting system comprising:

a. an RF generator;

b. an electrosurgical tissue cutting electrode in electrical communication with the RF generator;

c. a monitor for detecting DC potential between the tissue cutting electrode and adjacent tissue; and

d. a control unit responsive to the detected DC potential for controlling the output of the RF generator.

80. The system of claim 79 wherein a conductive plasma is generated when the DC potential between the tissue cutting electrode and adjacent tissue exceeds a predetermined limit.

81. The system of claim 80 wherein the control unit includes a start mode when the detected DC potential is less than the predetermined level and a run