RU3379U1 - REPAIR DEVICE FOR COMPRESSION-DISTRACTION DEVICE - Google Patents

Abstract

A repository device for a compression-distraction apparatus, comprising external removable rings, reponing elements for coupling the outer and inner rings and support rods, characterized in that the reponent elements are made in the form of clamps with round grips moving along the outer ring and L-shaped curved rods, fixed on support rods.

Description

The utility model relates to medicine, in particular to traumatology and orthopedics. The device can be used in the treatment of injuries and diseases of bones and joints in adulthood and childhood. as a complement to the known compression-distraction apparatus.

. Known reversing devices for compression and distraction apparatuses, consisting of rings (both solid, split and split, with holes or slots for spoke retainers), support rods, on which rings are worn, tie rods, fastening elements 1-3. All of them are quite difficult to assemble, do not provide quick installation and dismantling, do not provide sufficient dosed work opportunities when combining fragments in various planes, especially for rotational displacements, and sufficient access to the bone for additional research.

Closest to the proposed device is a mtsiopi rtom apparatus containing inner rings with spokes and spoke holders, external removable rings, retaining screws for connecting the outer and inner rings and threaded rods mounted on the rings. This device achieves a clear orientation of the support rods at an equal distance from one another, collapsibility and releasability of all elements. However, this device has several disadvantages, namely:

- supporting rods pass through the inner rings of the apparatus, i.e. close to the limb segment, which does not give much freedom to approach it; - rotation is possible only in a small volume, because rods interfere with it, and if it is necessary to eliminate a significant rotational displacement, then re-installation of the support rods is required;

the outer ring has a rectangular cross section, which limits its mobility to one plane.

The purpose of the utility model is to create sufficient functionality to work when combining bone fragments in different planes, to facilitate and reduce assembly and disassembly times, and to create sufficient access for additional bone studies ..

The proposed device consists of an outer ring (2) connected by screws with countersunk heads (3) using nuts to the main ring of the compression-distraction apparatus, and with support rods (8) connected using clamps (5) made in the form of grippers (b ), fixed to the outer ring with a clamping nut (10), and to the rods with the help of an additional clamp (7) with

mutually perpendicular holes. For finer adjustment of the plane of attachment of fragments, a L-shaped curved rod (9) is attached to the rod (8), which provides additional connection of the support rods with the rings. The outer ring can be either solid or consisting of two half rings fixed in the connector zone with screws that attach the outer ring to the main ring of the compression-distraction apparatus. The holes for the screws (4) are located at an angle of 90 °. A pair of mutually perpendicular spokes fixed with four standard spoke holders (not shown in the figures) is mounted on the inner ring. L-shaped bar is attached to the support rods by means of a coupling

or other standard methods (for example, flags and offsets from the Ilizarov apparatus).

The elements of the device that distinguish it from the prototype is the use as a reponing gripping elements (6) with a clamping nut and a L-shaped bent rod

In FIG. 1 shows a reponitor device mounted on a ring of a compression-distraction osteosynthesis apparatus and support rods in a horizontal projection.

Figure 2 is the same in axoometric projection.

In Fig. 3, the frontal projection of the device on the ring of the external fixation apparatus (rings are shown in section).

In FIG. 4 shows a variant of a compression-distraction osteosynthesis apparatus with a reponition device mounted on two middle rings.

Fig. 3 Fastening of the L-shaped curved rod on the assembled node.

Installation of the device is as follows:

At least four holes (4) are drilled in the ring of the external fixation apparatus (compression-distraction apparatus), for example, the Ilizarov apparatus, through which the outer ring is attached to the main ring (1) of the compression-distraction apparatus with countersunk screws (3) using nuts (1) with a rounded section (2).

Under local or general anesthesia, two (or more) pairs of mutually perpendicular spokes are inserted through the bone above or below the fracture site. Each spoke is fixed by tension in the ring.

compression-distraction apparatus (1), loosening it as far as possible at an equal distance from the skin of the limb segment. Then open (if not used whole) a ring with a rounded cross-section (2), put on it clamps (5) with a spherical grip (6), two for each half-ring and fix them with a clamping nut (10;) K

Then close the ring (2), placing it in the same plane with the inner ring (1). Slide countersunk screws (3) in a radial direction from the outer surface of the rings inward while pushing the nuts on the screws and connect both rings. Then, the couplings are threaded through the clamps (5), fixed with nuts, then support rods (8) are passed through the couplings, and they are placed at an angular distance of 90. It is possible to assemble the support rods with couplings and the outer ring in advance (before the operation).

Fix all the elements of the apparatus, after which, either during the operation or in the postoperative period, correction of the mixtures is carried out. Rotational displacements are eliminated by rotating the outer ring in the grip (6) with the help of an L-shaped curved rod threaded through a separate sleeve (7). Offsets at an angle are eliminated by moving the couplings (7) along the support rods (8) of the external fixation apparatus with the help of nuts, while the inclination of the ring changes. The lateral displacement is changed by moving the latches with a grip inside the couplings (7) in the desired direction.

The advantages of the device include the creation of sufficient functionality to work when combining bone fragments in different planes, facilitating and reducing assembly and disassembly times, creating sufficient access for additional bone studies. In the proposed device there are no obstacles for moving the rings with spoke holders in a sufficiently large volume. In addition, the device allows to reduce the number of support rods of the external fixation apparatus to four, due to

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transfer of reponition functions to the reponator device. It can be mounted on one or more rings of this device both during the operation and after it.

Used sources

1.A.p. 155301179. A 61 B17 / 58. Reposition apparatus / Donetsk honey. Institute, Levitsky F.A., Efimov Yu.M., Didenko A.I. and Khaet L.G.

2.A.s. 1461436. A 61 B17 / 58. Compression-distraction apparatus. / Kiev. Research Institute of Orthopedics, Sokolyuk A.M., Pustovoit M.I.

3.A.S. 1360718. Compression-distraction apparatus. / Poletansky V.Z.

Claims (1)

A repository device for a compression-distraction apparatus, comprising external removable rings, reponing elements for coupling the outer and inner rings and support rods, characterized in that the reponent elements are made in the form of clamps with round grips moving along the outer ring and L-shaped curved rods, fixed on support rods.