Bipolar instrument utilizing one stationary electrode and one mo

Details Bipolar instrument utilizing one stationary electrode and one mo Bipolar instrument utilizing one stationary electrode and one mo

1991-11-12

1993-03-30

Cohen, Lee S.

Surgery

Instruments

Electrical application

606 50, A61B 1739

Patent

active

051979640

ABSTRACT:
An electrosurgical instrument for the removal of tissue polyps and the like is disclosed. It features a bipolar pair of conductive electrodes for the cutting of tissue in which at least one electrode is moveable in relation to the other. These electrodes are mounted relative to an insulating plug, which is secured at the distal end of a tubular member. Pressure exerted on a thumb loop shifts the position of one electrode relative to the other. Upon application of RF voltage, the distance at which the electrodes are placed controls the amount of arcing which will occur between electrodes, when placed within a proper range. The electrodes are supplied with power from a standard RF energy source, controlled from a foot or hand switch. The insulating plug may further include metal traces disposed on the peripheral surface. When energized, these traces function as a bipolar pair of electrodes for effecting electrocoagulation of tissue and blood.

REFERENCES:
patent: 373399 (1887-11-01), Hamilton
patent: 1798902 (1931-03-01), Raney
patent: 1881250 (1932-10-01), Tomlinson
patent: 1978495 (1934-10-01), Landau
patent: 3920021 (1978-11-01), Hiltebrandt
patent: 4060087 (1977-11-01), Hiltebrandt et al.
patent: 4353371 (1982-10-01), Cosman
patent: 4418692 (1983-12-01), Guay
patent: 5085659 (1992-02-01), Rydell

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