High-frequency electrosurgical unit with timed safety shut down

Details High-frequency electrosurgical unit with timed safety shut down High-frequency electrosurgical unit with timed safety shut down

1986-01-15

1987-04-21

Coven, Edward M.

Surgery

Truss

Pad

12830317, 128419R, A61B 1736

Patent

active

046588159

ABSTRACT:
A supplementary acoustic warning signal is provided for a high-frequency electrosurgical unit which sounds only after the lapse of an interval set by a first delay circuit shows that one of the high-frequency generators in the unit remains active longer than what, on the average, is normal. A second delay circuit is provided to assure shut-off of the high-frequency generators if at least one of the high-frequency generators remains active without interruption longer by an interval set by a second delay circuit beyond the lapse of an interval of the interval set by the first delay circuit. The supplementary acoustic signal thus sounds before the second delay circuit shuts off the high-frequency generators. The intervals determined by each of the delay circuits are adjustable. The output signal of the second delay circuit which activates the shut-off relays is maintained until a switch is operated to reset the system, so that the malfunction which has led to shut-down will be dealt with before the unit is used again.

REFERENCES:
patent: 3812858 (1974-05-01), Oringer
patent: 3952748 (1976-04-01), Kaliner et al.
patent: 3955185 (1976-05-01), Nishimura
patent: 4038984 (1977-08-01), Sittner
patent: 4051855 (1977-10-01), Schneiderman
patent: 4074719 (1978-02-01), Samm
patent: 4191188 (1980-03-01), Belt et al.
patent: 4338940 (1982-07-01), Ikunu

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