Signal generating device and method for producing coagulation el

Details Signal generating device and method for producing coagulation el Signal generating device and method for producing coagulation el

1974-11-01

1976-06-15

Pellinen, A. D.

Surgery

Truss

Pad

323 4, 323 17, A61B 1736

Patent

active

039630307

ABSTRACT:
A signal generating device and method for producing an RF output signal regulated in power and of decaying amplitude suitable for use in an electrosurgical generator for surgical coagulation purposes. The device includes a circuit tuned to a predetermined radio frequency suitable to prevent nerve stimulation and the tuned circuit has connected therewith an unregulated power supply with current through the tuned circuit being controlled by means of a solid state switching system. The tuned circuit includes an inductor initially charged to a predetermined energy level. The switching system is automatically controlled so that the switching system is repeatedly urged to the closed position at predetermined time intervals and remains in this position until the current through the tuned circuit reaches a predetermined level at which time the switching system is caused to open and the tuned circuit thereafter rings to produce a regulated output signal of decaying amplitude, this output being taken from the tuned circuit across a transformer and is well suited for surgical coagulation purposes wherein the electrical current passes from an electrode to body tissue in the form of an arc with power dissipation being far greater in the tissue than in the arc for best operation.

REFERENCES:
patent: 3436563 (1969-04-01), Regitz
patent: 3471770 (1969-10-01), Haire
patent: 3562623 (1971-02-01), Farnsworth
patent: 3601126 (1971-08-01), Estes
patent: 3641422 (1972-02-01), Farnsworth et al.
patent: 3699967 (1972-10-01), Anderson

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