SU1397031A1 - Arrangement for osteosynthesis of the femur head - Google Patents

Abstract

The invention relates to surgical instruments used in traumatology, in particular for the operative joining of femoral neck fragments. The purpose of the invention is to ensure the stability of osteopathy of subcapital fractures of the femoral neck, preventing the device from migrating. For this, the device for osteosynthesis of the femoral neck contains a housing 1 with an opening 2, in which a cable 3 is installed, made in the form of a U-shaped loop, covering the transverse stop (spoke) 4. The pull arms pass through the internal lumen 5 of the compression spring 6 contacting one end with a washer 7, securing the ends of the rod, and the other end with the end of body 1. 4 Il. a &

Description

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The invention relates to surgical instruments used in traumatology, in particular for the operative joining of femoral neck fragments.

The purpose of the invention is to ensure the stability of osteosynthesis of subcapital hip fractures, preventing the device from migrating.

FIG. 1 shows a device for osteosynthesis of femoral bone, assembled on the base of a treslotal nail, rear view; figure 2 is the same, top view; in fig. 3 - a device assembled on the basis of a two-blade nail; in fig. 4 - the same, top view.

The device comprises a housing 1 with an opening 2, in which a ha 3 is installed, connected to a transverse stop 4 made in the form of a spoke, and a ha ha 3 is made in the form of a U-shaped loop covering the transverse stop 4. The ends of the rod 3 pass through The internal lumen 5 of the spring 6 is compressed and secured to the clamp 7. The compression spring 6 with one end contacts the clamp 7, and the other with the end of the housing 1.

The device works as follows.

Body 1 along with stage 3 are inserted into the neck of the femur. At the same time, it is oriented in such a way that the hole 2 is in the frontal plane, and the ton 3 in the same plane located on the rear surfaces of the two anteriorly facing blades (Fig. 1 and 2). .

During the insertion of the device into the bone, such an installation of the rod 3 may be disturbed, it is corrected. To do this, place the ends of the gi 3 on the outside and put it on one thin tube, use appropriate segments of injection needles (not shown) and use the blows on the outer ends of the tubes 3 to move along the length of the housing 1 until it stops at the inner edge of the hole 2 The tubes are then removed.

With the help of a metal reference grating installed on the front surface of the hip joint, the projection of the central fragment and the internal cavity is determined on it, and the bodies 1, through which the stop 4 is carried out in the sagittal direction

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exit it on the opposite side.

Radiographically, they are convinced that the stop 4 enters the opening 2 of the housing 1, after which the front end of the stop 3 is folded and pulled by the rear end is submerged under the skin until it stops at the bone.

A spring 6 is inserted into the recess at the outer end of the body 1 so that the ends of the pull rod 3 pass through the inner lumen 5 of the spring 6. These ends are put on the grommet 7, after which they are twisted up to the stop 7 on the end face of the body 1.

By the same principle, a device made on the basis of a two-blade nail is applied (Fig. 3 and 4). Its design does not allow the spring 6 to be placed inside the housing 1, therefore, the tension of the rod 3 is provided by two springs 6, which are mounted separately at the ends of the rod 3. The latter are fixed on the washers 7 at. compressed springs 6, located outside the body of the patient. In the fabric, up to the stop into the butt end, only very thin retaining tubes of the body 1 are recessed, which are, as it were, a continuation of the body 1.

The external arrangement of the spring 6 and the washers 7 makes it possible to regulate the compressive force of the spring during the postoperative period, and also facilitates the removal of the device.

Deleting a device is as follows.

In the tissues on the posterior surface of the hip joint, the end of the stop 4 is located, which is moved forward until it appears under the skin of the anterior surface of the thigh. The stop 4 is removed, after which the washer 7 is pushed out by the spring 6 outwards. By a small incision in the under-cover area, the washer 7 is exposed, the ends of the pull rod 3 are unwound, after which the washer 7 and the spring 6 are removed. Then both ends of the rod 3 are grasped with forceps and with light strokes outwards are removed together with the housing 1.

Removing the device with springs and washers located outside is even easier, since there is no need to strip the washer 7.

Under the action of the spring 6, which is carried out outwards and rests against the end of the housing 1, the latter is acted upon by the force directed inward.

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which enhances the stability of osteos- ntes and prevents its migration in the postoperative period.

In addition, the device provides more reliable fixation of fragments and their constant compression, easily removed after fracture consolidation. Moreover, the presence of aperture 2 at the base of the blades contributes to the recovery of microcirculation inside the fragments and their fusion.

Claims (1)

Invention Formula A device for osteosynthesis of the femoral neck, comprising a body with an opening in which it is mounted with the possibility of longitudinal movement, connected to a transverse rest, and a compression spring, in order to ensure the stability of osteosynthesis of subcapital fractures of the femoral neck and prevent migration of the device, the cross stop is made in the form of a needle, and the tractor is mounted in the form of a U-shaped loop covering the needle, while the ends of the loop are fixed to the washer, and the compression spring is in contact with one end of the needle yboy, and the other with the end of the case. FIG. 765 Fivl