DE8914852U1 - Medullary awl with a working tip and a grip area - Google Patents

Description

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Pennig, Dietmar, Dr. med., Laukamp 11, 4400 Münster

"Medullary awl with a working tip and a Grip area"

The innovation relates to a medullary cavity pfreeze according to the generic term of the basic principle.

Such medullary awls are well known and are used to open the bone in order to subsequently perform an intramedullary nailing, in which a stainless steel awl with, for example, a clover-shaped or L-shaped cross-section is inserted into the medullary tube under X-ray control in the case of a long tubular bone. The medullary cavity is Inserting the nail is opened with a drill, which requires that the bone itself be given a corresponding opening using an awl and that a guide wire is inserted through this opening to guide the medullary reamer.

It has been found to be disadvantageous that after the medullary awl has been removed from the opening created by the medullary canal before the guide wire is inserted, the muscles close the opening again and it is then no longer visible.

The innovation is based on the task of creating a device that ensures that the opening is kept open as long as desired and that the exchange of corresponding tools is possible.

This task underlying the innovation is

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- 2 is solved by the teaching of the main claim.

Advantageous embodiments are explained in the subclaims.

In other words, it is proposed that the actual medullary awl be combined with a receiving quiver, which is inserted into the opened opening at the same time as the bone is opened by operating the medullary awl. If the medullary awl is now withdrawn from the quiver, the outer wall of the quiver holds the opening formed by the medullary awl open. Preferably, the lower edge of the receiving quiver is designed with such sharp edges that a smooth transition from the working tip of the medullary awl to the outside of the receiving quiver is possible.

An example of the innovation is explained below using the drawings. The drawings show

Fig. i in an exploded view the two

other interacting parts and and In

Fig. 2 the two parts 1n Fig. 1 pulled apart 1m in the assembled state.

In the drawings, 1 denotes a medullary awl, which has a working tip 2 and which can be operated via a handle area 6. 35

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3 denotes a receiving quiver which has a through hole, the size of which is adapted to the outside of the medullary awl 1, so that the medullary awl 1 can be inserted into this receiving quiver 3 is possible in such a way that in the inserted state - as is particularly clearly shown in Fig. 2 - the working tip 2 of the medullary awl 1 protrudes beyond the lower edge limit 4 of the receiving quiver 3.

The receiving quiver 3 has an operating handle 5 and the two handles, namely the grip area 6 and the operating handle 5 are designed in such a way that they are flush with each other for position so that - as shown in Fig. 2 - in the assembled state almost a one-piece tool is created.

It is clear that in the ready-to-work state according to Fig. 2, the bone can now be opened by operating the actual working tip 2 accordingly. When the opening is made, the outside of the receiving quiver rests against the inside of the opening created and now the medullary awl 1 can be withdrawn and The guide wire is inserted through the hole in the holder 3 and is then introduced into the bone.

From Fig. 2 it is also clearly visible that the

The transition from the outside of the working tip 2 to the outside of the receiving quiver 3 is stepless.

Claims (1)

"Medullary awl with a working tip and a Grip area" 10 Medullary awl with a working tip and a gripping area, characterized by a receiving sleeve (3) which receives the medullary awl (1) in such a way that the working tip (2) of the medullary awl (1) projects beyond a lower edge limitation (4) of the receiving sleeve (3) and the medullary awl (1) can be secured to the receiving sleeve (3). 15 Medullary awl according to claim 1, characterized in that the transition from the outside of the working tip (2) of the medullary awl (1) to the outside of the receiving quiver (3) is stepless. 20 Medullary awl according to claim 1, characterized in that the lower edge boundary (4) of the receiving quiver (3) is designed with sharp edges. 4. Medullary awl according to claims 1 to 3, characterized in that the receiving quiver (3) has an actuating handle (5). 5. Medullary awl according to one or more of the preceding claims, characterized in that the grip region (6) of the medullary awl (i) can be placed flush with the operating handle (5) of the receiving quiver (3).