SU780838A1 - Wire holder for compression-distraction apparatus - Google Patents

Description

I

The invention relates to medical technology, in particular to devices used in orthopedics and traumatology for the treatment of injuries and diseases of bones.

Known spit holder to a compression-distraction apparatus, containing a .P-shaped bracket mounted on a ring, having a threaded hole and a groove for a needle, nuts 1.

However, when using a known device, in some cases the fixation rigidity decreases (due to the presence of large elevators in the joints of moving parts in the repositioned nodes), while in others there is no possibility of rigid fixing of the fixation pieces on any part of the beam or ring and also the external slats anywhere on the ring. In addition, the well-known knife holder does not meet its requirements, as the groove under the needle is located eccentric to the axis of the clamping bolt, which causes a significant reduction in the clamping force (in practice, the spokes have to be periodically tightened as they creep out of the clamp during treatment) . As a result, the cage capabilities of the apparatus are reduced, both in terms of the reliability of fixation of fragments, and in (Meaning of the accuracy of the dosed elimination of displacements.

The purpose of the invention is to provide the possibility of dosed elimination of fragments displacements and increase the reliability of their fixation.

ten

For this, the cutter holder is provided with a bar with holes, connected to the bracket with threaded rods, which are integral with the ends of the brackets and mounted in the holes of the bar, and

15, the axis of the groove is aligned with the axis of the threaded ends, the groove being grooved.

FIG. 1 was invented by a spit holder for a compression-distraction apparatus, front view; in FIG. 20 the same, side view} in FIG. 3 shows section A-A in FIG. It on. 4-10 are the main use cases of the spoke holder.

25

The cutter holder contains a U-shaped bracket 1 mounted on the ring 2, having a threaded hole A and a groove B under the needle 3, nuts 4, a bar 5 with openings associated with the bracket 1 threaded rods 6, is.

thirty

at the same time and} scarlet with the ends of the brackets installed in the holes of the rail. Axis grooves. B is combined with the axis of the threaded ends, and. the groove itself is grooved. Average hour. In one of the planes of the bar 5 has a rough treatment.

--- FIG. 4 shows a variant of fixing the needle 3 that does not pass through the center of the ring 2 (for example, in the case of fixation of the bones of the lower leg), while the bar 5 contacts the needle with its roughly treated section B, which increases the reliability of fixing the needle ,

FIG. 5 shows a variant for fastening the spokes 3 diametrically disposed. the ring 2 lines. The needle is located in the grooved groove A (not shown in Fig. 5), which makes it possible to form a grooved groove, which significantly increases the reliability of the fixed needle, in contrast to the known wire rollers, in which it is impossible to apply such a groove, since the surface, on which it is located, in whole or in part, but overlapped by other structural elements. The needles are clamped 3 Å toM and the other case is realized with nuts 4.

FIG. 6-10 illustrate the benefits. proposed design associated with the possibility of a rigid. (go 6th and fixed) connection

parts of the apparatus with a ring, regardless of the presence and location of the holes.

FIG. b shown fixed connection rod b with ring 2 with the aid of the п-bar and bracket. The need for such compounds exists, for example, in an apparatus for the osteosynthesis of the femur when connecting the arc with the Kolbtsy. FIG. Figure 7 shows the tension and position adjustment unit of the spokes 3, including a distraction rod 7, connected to the ring m 5 b by means of playok with end fastenings of brackets 8 and the proposed spitderl. :

Fig. 8 shows the disjoint rotary / displaced unit (Disturbance. Distal ring 9 and proximal ring 10 are movably connected to each other by means of a threaded rod 6, a clamp 1 and a strap 5. Rod 6 with bushing 11 and a threaded rod 12 is connected to the bracket 8, fixedly mounted on the ring 9. The rotational movement of the rings is not known when

780838

dosed by changing the length of the rod 12 in one direction or another.

FIG. 9 shows a node for elimination of angular displacement of fragments, formed by rods b, hinged at the level of a fracture with the help of brackets 8. A slider formed by bracket 1 and bar 5 allows to install and fix the node in the required place according to the location of the apex of the angular displacement of fragments .

FIG. 10 shows an assembly for the elimination of fragments displacement along the width. The threaded rod 13 is fixedly mounted with the help of the described cutter holders in a plane parallel to the plane of displacement and serves as a guide for moving the rod 7 connected to it by means of the bracket 14. When the nuts 15 are rotated, the proximal ring associated with it moves to one side or the other.

The proposed cutter holder allows one to increase the rigidity of fixation of bone fragments by increasing the reliability of fixation of the spokes, the accuracy of reposition of fragments and the convenience of controlling their position by eliminating limitations in the installation of the repository units of the apparatus, which greatly enhances the medical capabilities of the apparatus. Invention Formula

Claims (2)

1. A hinge holder for a compression-distraction apparatus, containing a U-shaped bracket mounted on a ring, having a threaded hole and a groove for a needle, and nuts that in order to provide the possibility of dosed elimination of fragments displacements and increase reliably. As they are fixed, the cutter holder is provided with a plate with holes, connected with a pair of threaded rods, integral with the ends of the brackets and installed in the holes d of the rod, and the canal axis ki combined with the axis of the threaded ends. 2. The hinge holder according to claim 1, which is different in that the groove is made grooved. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 538710, cl. A 61 B 17/18, 1977.