Operating insert for a resectoscope with sealing means

Details Operating insert for a resectoscope with sealing means Operating insert for a resectoscope with sealing means

1989-09-29

1991-08-20

Hindenburg, Max

Surgery

Instruments

Electrical application

604167, A61B 1736

Patent

active

050411110

ABSTRACT:
An operating insert to be passed through a resectoscope shaft comprises a channel for an axially displaceable cutting loop which extends parallel to an optical system through the operating insert. The cutting loop has branches secured within a tube and merging at their proximal ends into an electrode stem which extends beyond the shaft as far as an electrode carrier. An annular cylindrical sealing element of plastics material or the like is secured on the stem or on the inner side of the channel and bears via sealing projections against the inner surface of the cutting loop so as to prevent the passage of fluid to the proximal end of the channel while allowing axial movement of the stem and the tube within the channel.

REFERENCES:
patent: 2102270 (1937-12-01), Hyams
patent: 4325374 (1982-04-01), Komiya
patent: 4485812 (1984-12-01), Harada et al.
patent: 4503855 (1985-03-01), Maslanka
patent: 4718419 (1988-01-01), Okada

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