UROLOGICAL RESECTOSCOPE FITTED WITH AN INSULATING ELEMENT AT ITS EXTERNAL STEM

摘要

A urological resectoscope (1) comprising a tubular, metallic external tube (2) fitted with holes (3) in its distal end zone, a tubular insulating element (7, 27, 37, 47) being affixed distally to said external stem, further comprising a tubular internal stem (8) configured within said external stem and resting against it in sealing manner and an electrode support (13) longitudinally displaceable inside said internal stem and supporting a cutting loop (15) in the region of the insulating element (7, 27, 37, 47), the inside space of the internal stem (8) and the gap (12) between the stems (2, 8) being proximally connected to liquid hookups (10, 11), the internal stem (8) and the electrode support (13) being connected to the outer stem (2) in a manner allowing the internal stem (8) and the electrode support (13) to be proximally pulled out of the external stem (2) and the external stem (2), the insulating element (7, 27, 37, 47) being configured in longitudinally mutually overlapping manner within an affixation zone (6) and the insulating element (7, 27, 37, 47) exhibiting a wall thickness distally from the affixation zone (6) larger than the wall thickness of the external stem (2), is characterized in that the inside diameter of the insulating element (27, 47) is the same as the inside diameter of the external stem (2).