Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1995-07-12
1996-12-17
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 71, A61N 140
Patent
active
055848630
ABSTRACT:
A system for tissue-impedance matched pulsed radio frequency (PRF) electrotherapy includes a power supply, an excitation board for generating PRF signals of a selectable frequency, the board having an input from the power supply. The system also includes a power amplifier for signals from the excitation board. Included is a subsystem for controlling pulse width duration, pulse burst repetition rate, and amplitude of the PRF signals, the controlling system having an input from the power supply. Further provided is a subsystem for continually comparing the amplitude of the PRF signals outputted from the amplifier to a reference value, this including a feedback circuit responsive to difference information between the compared signals and the reference value, the difference information inputted to the controlling subsystem for adjustment of the amplitude and impedance of the PRF signals from the excitation board, the comparing system including an output of power and impedance compensated PRF signals. The system also includes a variable reactance athermapeutic applicator having, as a coaxial cable input, the power and impedance compensated PRF signals outputted from the comparing subassembly, the applicator including a treatment surface having an effective physiologic impedance in the range of 25 to 75 ohms.
REFERENCES:
patent: 2276996 (1942-03-01), Milinowski
patent: 3270746 (1966-09-01), Kendall et al.
patent: 3800802 (1974-04-01), Berry et al.
patent: 4305115 (1981-12-01), Armitage
Oh Se Y.
Pilla Arthur A.
Rauch Thomas
Electropharmacology, Inc.
Kamm William E.
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