SU728849A1 - Compression-distraction apparatus - Google Patents

Description

S

The invention relates to medicine, namely to traumatology and orthopedics, and can be used in the treatment of fractures and false joints of limb bones.

A compression-distraction apparatus is known, which contains inner rings connected by threaded rods, spokes with knitting needles and fasteners 1.

However, the known apparatus does not provide strong fixation of bone fragments.

The aim of the invention is the elimination of width shifts and rotational shifts.

This is achieved in that the apparatus is provided with removable outer rings, notched plates and washers with notches connected to each other and to the inner rings by means of threaded rods and fasteners in the form of bolts and nuts, and a multi-directionally threaded thread, one end of which is reinforced. on one of the removable outer rings, and the other end is mounted on one of the inner rings.

FIG. 1 shows the compression-distraction apparatus (without the lower ring).

general form; in fig. 2 - outer ring of the compression-distraction apparatus; designed to eliminate the displacement of peripheral fragments in width and create lateral compression of fragments,

from above; in fig. 3 is a section A-A in FIG. 2; in fig. 4 - outer ring of the cognitive-distraction apparatus, designed to eliminate rotational displacement of fragments, top view; in fig. 5 is a section BB in FIG. four; in fig. 6 - middle rings of the compression-distraction apparatus after reposition, front view; in fig. 7 - notched strip.

Compression-distraction apparatus contains -removable outer rings 1 and 2.

Claims (1)

Ring 1 is fixed to the inner ring 3 by slats 4, having longitudinal grooves and secured with threaded rods 5 with nuts and bolts 6. The outer ring 2 is connected to the inner ring 7 by straps 8, having longitudinal grooves and attached by bolts 9 to rings 2 and 7; One end of the gland 10 is fixed to the inner ring 7 by the grip 11, and the other end to the outer ring 2 by the clutch 12 and nuts 13, 14 and 15. To eliminate rotational displacements of the fragments, ring 2 is connected to the ring 7 by straps 16 in the couplings 17. St Jacks have right and left threads on their halves. Couplings are fixed on rings 2 and 7 by nuts 18. After removing the displacements, the fragments of ring 3 and 7 are fixed by plates 19 with notches, shields 20 with notches, fixed rods 21, bolts 22 and nuts 23. The device works as follows. To each ring of the apparatus, two crosswise-positioned spokes are fixed, conducted through bone fragments in two mutually perpendicular planes. Then the outer rings 1 and 2 are fixed to the inner rings 3 and 7. The ring 1 is fixed so that its center coincides with the center of the ring 3. After firmly fixing the ring 1 with the bars 4, threaded rods 5 with nuts and bolts 6 to the ring 3 ring 1 is firmly connected to the ring 2 by threaded rods 5. Then the ring 2 is firmly fixed to the ring 7 with different parts depending on the displacement of the peripheral fragment. When the latter is displaced along the width and in order to create lateral squeezing of the fragments, ring 2 is connected to ring 7 by straps 8, bolts 9 and 10. Rings 2 and 7 are fastened with strips having longitudinal grooves, by means of bolts. The ring 7 is located eccentrically to the ring 2 due to the displacement of the peripheral fragment. Rings 2 and 7 are also fastened with a brace 10. After firmly fixing rings 1 and 2, the threaded rods between rings 3 and 7 are removed to rings 3 and 7. To eliminate the displacement of fragments in width and create lateral squeezing of fragments, bolts 9 unscrew release the nut 14 and tighten the nut 13, thereby moving the ring 7 in the desired direction. The grooves in the bars 8 allow movement of the ring. After reposition, bolts 9 are wrapped. If a bone fracture is repositioned, it is carried out simultaneously. With the removal of the displacement across the width of the peripheral fragment of the false joint and the creation of lateral squeezing of the surfaces of the false joint, the movements are carried out gradually 1 mm per day in 2-3 doses. In order to eliminate the rotational displacements of the peripheral fragment, the ring 2 is connected with the ring 7 with the strings 16 and simultaneously rotated with spanners. Since the brackets have right and left threads on their halves, screwing into the couplings 17, they turn the ring 7 together with the bone fragment and set it in the correct position. To eliminate the angular deformations, the rings on the respective sides are stretched with nuts on the threaded rods 5. After elimination of the deformations of the fragments, rings 3 and 7 are displaced one against the other. They are fixed with slats and washers 20, having notches, as well as tension rods 21 and bolts 22. The slats and washers with notches hold the rings of the compression-distraction apparatus in a position that ensures the correct stance of fragments; with further distraction of the displacement of the rings does not occur. Rings 1 and 2 are removed after installation of the stem rods and firm fixation of the rings of the compression-distraction apparatus using straps and washers with notches. Thanks to the use of removable outer rings of a larger diameter than the inner rings with which they are connected, as well as the use of four rings of a compression-distraction apparatus, the bone fragments are firmly fixed both during reposition and after it. In addition, the device makes it possible to easily eliminate all types of fragments displacements, especially difficult removable displacements along the width and rotational displacements, and also provides lateral squeezing of fragments. After reposition, the inner rings of the compression-distraction apparatus are fixed with tension rods with the help of strips and washers having a notch, which keeps the rings of the apparatus and fragments in the correct position. If necessary, fragments can be distracted after elimination of their displacements. Claims Compression-distraction apparatus containing inner rings connected by threaded rods, knitting needles with knitting needles and fasteners, characterized in that, in order to eliminate shifts along the width and rotational displacements of bone fragments, it is provided with removable outer rings, plates with notches and washers with notches connected to each other and to the inner rings by means of threaded rods and fasteners in the form of bolts and nuts, as well as with multidirectional threads, one end of the cattle The ring is mounted on one of the removable outer rings, and the other end is mounted on one of the inner rings. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 367858, cl. A 61 B 17/18, 1970. Figg.Z / 7 PlAZ. B- b naSep well then feE  and him /five FIG .. sc