Patent ID: 7488318

Claim:
A urological resectoscope with a tubular shaft ( 3 ), having a fixed optical guide tube ( 2 ), within which there is an optical system ( 1 ), which projects distally beyond the optical guide tube, an elongate, rod-shaped carrier ( 4 ), which carries a cutting instrument ( 6 ) at its distal end, being longitudinally moveably mounted in the tubular shaft ( 3 ) outside the optical guide tube ( 2 ), which carrier is held distally from the optical guide tube ( 2 ) with a sliding tube ( 8 ) on the optical system ( 1 ) at a radial spacing from the axis of the optical system ( 1 ) and is secured in the peripheral rotary direction to the optical guide tube ( 2 ) with a rotary lock ( 9 , 10 ), wherein the rotary lock has a bar ( 9 ) parallel to the carrier ( 4 ) and connected to it and a distally open elongate slot ( 10 ) in the optical guide tube ( 2 ).