Electrosurgical unit

Details Electrosurgical unit Electrosurgical unit

1976-02-06

1977-10-04

Michell, Robert W.

Surgery

Truss

Pad

12830317, 128422, 336 69, 336208, A61B 1736, A61N 300

Patent

active

040518558

ABSTRACT:
An electrosurgical unit for use in tissue cutting or coagulation procedur A vacuum tube oscillator operating in push-pull relationship generates RF oscillations which are extracted across a balanced coil transformer, the secondary of which is ungrounded. Forceps are provided to be connected across the output of the transformer for producing an isolated voltage for use in sealing off bleeding blood vessels. A handpiece is also provided for connection across the transformer output for selectively producing a cutting voltage or a coagulation voltage. An intensity control circuit is capable of connection in the power supply to control the output voltage. A pulse modulation unit is capable of being connected at the input of the oscillator to control the "on" time of the oscillator. A switching circuit operates to interconnect the intensity control to the power supply when the cutting probe is being utilized for cutting procedures, and connects the pulse modulation unit to the oscillator when the coagulation signal is being provided across either the forceps or the handpiece. An indifferent plate, also known as a dispersion electrode, is utilized together with the handpiece for cutting procedures. The indifferent plate is completely isolated from ground to prevent shocks and burns occurring on the patient at inadvertent ground points.

REFERENCES:
patent: 1605302 (1926-11-01), True
patent: 1868155 (1932-07-01), Wheeler
patent: 1945867 (1934-02-01), Rawls
patent: 3601126 (1971-08-01), Estes
patent: 3675655 (1972-07-01), Sittner
patent: 3804096 (1974-04-01), Gonser
patent: 3834392 (1974-09-01), Lampman et al.
patent: 3885569 (1975-05-01), Judson
patent: 3952748 (1976-04-01), Kaliher et al.
patent: 3964487 (1976-06-01), Judson

Affiliated with

Also associated with

Rating

Electrosurgical unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrosurgical unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrosurgical unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1770427