Arbeitskanüle für die arthroskopie

The invention concerns a Arbeitskanüle consisting for the Arthroskopie, in particular the shoulder and the knee, of a pipe and a removable locking pin (Trokar), led into it. During a well-known mechanism, which of the company Arthrex is driven out, is the locking pin with a blunt front end provides, since a point could lead to injuries in particular also from nerves, while a blunt tap can be pressed by the muscle tissue. From SU-AI 15 21 465 is a mechanism on the other hand consisting of Trokarhülse and Trokar already admits become, whereby the Trokarhülse within the distal final range exhibits an external thread, which by the thread the Trokarspitze is continued. During the first mentioned execution the goal security of the mechanism is relatively small. With a threaded Arbeitskanüle it arrives on the other hand critical of finding immediately the correct situation in the joint since repeated screwing of the sharp edged equipment in is to be avoided absolutely. The invention guarantees a goal-safe would bring in the Arbeitskanüle that the locking pin exhibits a continuous central drilling for the admission of a guidance wire. Actually it seems paradoxically, the locking pin (Trokar), whose task is locking the Trokarhülse to design even again as case. The central drilling of the locking pin, which is planned according to invention, is however surely locked by the guidance wire during the introduction of the Arbeitskanüle. Details of the invention are described afterwards on the basis the designs. In these Fig places. 1 the two parts of a remark example separately into side view, Fig. the mechanism shows 2 after Fig. i in the assembled condition, Fig. 3 is a partial cut by Fig. 2, and Fig. 4 a complete profile of the mechanism after Fig. 2 and/or Fig. 3. Substantial part of a Arbeitskanüle for the Arthroskopie is a pipe i, which in the available case with a sharp edged thread 2 is provided. At the outside end is a pipe union 4, by which for example a liquid can be pressed in. With would in particular bring the pipe 1 into a joint, into the shoulder joint, is filled out the pipe in 1 by a locking pin 5, whose point threaded 8 rises up by the pipe 1 and whose thread in such a manner it continues that the diameter decreases to the point rapidly. A beginning 7 at the exterior of the locking pin engages into an extension 3 of the pipe, if the locking pin 5 into the pipe i is inserted completely. Thus can, as from Fig. , the pipe 1 is evident to 3 by means of the turning grasp 6 to be screwed in, which at the locking pin 5 is arranged. For the invention the central drilling 9 in the locking pin 5, which changes toward the turning grasp 6 into an extension I0, is substantial. The diameter of the drilling 9 amounts to about 1 mm, whereby a safe stop for a guidance wire is given. As safe guidance wire in particular as Kirschnerdraht well-known intensified wire from spring steel in consideration, which is flexibly ductile and exhibits high breaking strength, comes in. With an operation first a Arthroskop is introduced and in-stung then into its visual field the guidance wire to the desired place. Over the guidance wire now by the guidance wire the mechanism under tricks of the turning grasp 6, consisting of pipe 1 and locking pin 5 (Trokarhülse and Trokar), is also screwed in for secured destination. Subsequently, the guidance wire and the locking pin 5 are pulled out, whereby the thread 2 holds the pipe 1 in its position, so that now by the pipe 1 the desired manipulations can be made. Ansp reche: Arbeitskanüle for the Arthroskopie, in particular the shoulder and the knee, consisting of a pipe and a removable led into it locking pin (Trokar), whereby the pipe an exterior threads exhibits, which is continued by a thread of the point of the locking pin managing over the pipe, by the fact characterized that the locking pin (5) a continuous central drilling (9) for the admission of a guidance wire exhibits. Arbeitskanüle according to requirement i, thereby characterized that the drilling (9) at the input side an extension (i0) exhibits. Arbeitskanüle according to requirement 1 or 2, by the fact characterized that the locking pin (3) with a beginning (7) is provided, which after sliding into an oblong extension (3) of the pipe (I) in Einschubund direction of rotation at the pipe (i) fastens.