Electrosurgical apparatus

Details Electrosurgical apparatus Electrosurgical apparatus

2005-05-10

2005-05-10

Rollins, Rosiland (Department: 3739)

Surgery

Instruments

Electrical application

C606S034000, C606S037000, C606S038000, C606S041000, C606S042000

Reexamination Certificate

active

06890331

ABSTRACT:
An electrosurgical apparatus comprises a high frequency generator (1) with an associated power control system, a handpiece (2) with means for removably mounting an electrode (5) therein, and a connection cable (3) between an output (4) of the generator and the handpiece. The transfer characteristic of the system provides a substantially true ohmic transfer of loads on the electrode side of the connection cable (3) to the generator side thereof at or around a predetermined load on the electrode.In order to achieve a fully automatic and optimalized control af power supplied from a cutting electrode, whereby the control is instantly responding, to changes in the electrode load, the electrosurgical apparatus is characterized in that the power control system comprises a driver stage (7) followed by a reflectormeter (9) adapted and arranged to sense the generator output (4). A detector (10) supplies a detector signal which represents the reflected signal on the output (4), and the detector signal is communicated to the driver stage (7) for controlling the gain thereof.

REFERENCES:
patent: 4580562 (1986-04-01), Goof et al.
patent: 5188122 (1993-02-01), Phipps et al.
patent: 5720744 (1998-02-01), Eggleston et al.
patent: 5749869 (1998-05-01), Lindenmeier et al.
patent: 5957969 (1999-09-01), Warner et al.
patent: 5976128 (1999-11-01), Schilling et al.
patent: 6010499 (2000-01-01), Cobb
patent: WO 95 09577 (1995-04-01), None

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