UROLOGICAL RESECTOSCOPE STEM

Abstract

A urological resectoscope stem (1) including an insulating muff (11) constituting the end zone of the stem (1), further including an outer tube (2, 9), an inner tube (3) and a cross-sectionally annular distally closed return flow duct (4) which is subtended at least over the larger part of its length between the outer tube (2, 9) and the inner tube (3), where the stem (1) is fitted with outwardly open, distally extending grooves (10), wherein the annular return flow duct (4) communicates directly by apertures (19) with the grooves (10).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings elucidate the present invention in illustrative and schematic manner.

FIG. 1 is a top view of the distal end of a first embodiment of a stem of the present invention,

FIG. 2 is a section along line 2-2 in FIG. 1,

FIG. 3 is a section along line 3-3 in FIG. 1,

FIG. 4 is a section corresponding to FIG. 2 of another embodiment mode,

FIG. 5 is a section corresponding to FIG. 2 through another embodiment mode,

FIG. 6 is a section corresponding to FIG. 2 through a further embodiment mode, and

FIG. 7 is a section corresponding to FIG. 2 through still another embodiment mode.

Claims

1. A urological resectoscope stem (1) comprising: an insulating muff (11) constituting the distal end zone of said stem (1),an outer tube (2, 9),an inner tube (3), anda cross-sectionally annular distally closed return flow duct (4) which is subtended at least over the larger part of its length between the outer tube (2, 9) and the inner tube (3), where the stem (1) is fitted with outwardly open, distally extending grooves (10), wherein the annular return flow duct (4) communicates directly by apertures (19) with the grooves (10).

2. The stem as claimed in claim 1, wherein the grooves (10) are made in the outer tube (2, 9).

3. The stem as claimed in claim 2, wherein the distal rim of the outer tube (2, 9) is closed.

4. The stem as claimed in claim 1, wherein the insulating muff (11) is overlapped, within a proximal zone of reduced diameter, by the outer tube (2, 9).

5. The stem as claimed in claim 4, wherein the grooves (10) are made in the outer tube (2,9) and the grooves (10) run distally as far as beyond the reduced zone of the insulating muff (11).

6. The stem as claimed in claim 5, wherein the grooves (10) are fitted with recesses (23) reaching as deep as into the insulating muff (11).

7. The stem as claimed in claim 1, wherein the outer tube (2, 9) is fitted with an inner flange (12) resting against the proximal edge (13) of the insulating muff (11), the inside diameter of said inner flange being widened in its proximal zone (14) up to the outside diameter of the inner tube (15).

8. The stem as claimed in claim 1, wherein the distal end zone of the outer tube (2) comprising the grooves (10) is a perforated collar (9) affixed to said outer tube.