Resectoscope electrode assembly with non-conductive bearing tube

Details Resectoscope electrode assembly with non-conductive bearing tube Resectoscope electrode assembly with non-conductive bearing tube

1977-08-15

1979-04-17

Cohen, Lee S.

Fluid-pressure and analogous brake systems

Multiple control

Fluid and electric

A61B 1732

Patent

active

041495381

ABSTRACT:
A resectoscope electrode assembly having a non-cylindrical bearing tube formed of electrically non-conductive plastic material for slidable mounting upon the endoscope stem of a resectoscope. An electrode extends through a separate passage in the same bearing tube and is in direct electrical contact with that tube. One section of the electrode takes the form of a pair of spaced parallel arms projecting forwardly from the front end of the tube and terminating in an electrode tip, commonly in the form of an arcuate cutting loop. Another section of the electrode comprises a lead which extends from the rear end of the tube and which terminates in an offset connecting portion for engagement with and retention by the connector of the resectoscope. The lead and arms are encased in insulating sleeves, such sleeves being buried in and sealed to the bearing tube to prevent arcing between the bare electrode within that tube and the metal endoscope upon which the bearing tube is slidably supported. The method of making the assembly and the instrument with which that assembly is operatively associated are also disclosed.

REFERENCES:
patent: 2448741 (1948-09-01), Scott et al.
patent: 2888017 (1959-05-01), Wallace
patent: 3752159 (1973-08-01), Wappler
patent: 3856015 (1974-12-01), Iglesias
patent: 3901242 (1975-08-01), Storz
patent: 3939839 (1976-02-01), Curtiss
patent: 3973568 (1976-08-01), Iglesias

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