RU36205U1 - Bone fragments reduction device - Google Patents

Description

The alleged invention relates to medical equipment, namely to traumatology and orthopedics, and is intended to compare bone fragments in conjunction with compression-distraction devices and external fixation, mainly with the use of rod devices.

There are several types of repositions of bone fragments. For example, a simultaneous forced reduction during a fracture: shin bones on an orthopedic table or on special stretching devices. For reduction, sometimes it is necessary to drag a large force up to 0 kG.

The technique for replicating a limb fracture can be different, for example, Joschop-Ozhops R in the book Fractures of bones and joint injuries. Translation from English prof. RL Ginsburg, ed. Medicine, 1972, CTp.5S6, 527, recommends repository using the Apparatus, for stretching the lower leg.

The apparatus consists of an L-shaped bar with a fixture FOR coarse and fine adjustment. The correct position of FRAGMENTS is provided by the apparatus when the lower leg hangs along the line of gravity. The comparison is made by the surgeon.

These devices provide a fairly accurate reposition of bone fragments, however, when compression and distribution devices and external fixation devices are applied to the limb, for example, devices from the Kit of spinal rods for transosseous osteosynthesis of long and short tubular bones АСС-4К-ГЭП ЦИТО with a set of tools for their installation (for the shoulder and forearm АСС-4КШ, for the thigh ASP-4Ь2, for the lower leg АСС-4КГ, for the foot АСС-4КС), (as G.A., Ilizarov type), pa: port 33797 МЖК 025.00.00 ПС State Expert undertook Moscow, containing} d1, half rings, rings, rods, brackets, plank-, beams, distraction rods, knitting needles, bolts, nuts, special fixing bolts, washers, bone fragments move among themselves due to the complexity of the apparatus manipulations.

The existing design of the apparatus for reposition and fixation of bone fragments a.c.N 176464S, MKI A61V 17./5S, publ. 09/30/92, bull. M 36 contains supports connecting them — ie their rods, spokes, a locking element with a holder and a spherical hinge connected with the holder. The fixation element 1-1i is made with a pivotally mounted working end and placed in the holder with the possibility of metered axial movement, and the holder is made with a beveled end from the working end of the fixing element, while the spherical hinge is mounted on the rod.

This device provides reposition of small fragments, for example, reposition of the talus. It is difficult to perform accurate reposition of large fragments of tubular bones using this device. - 3 -

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It is possible to more accurately combine bone fragments with help; 11 Ring bus for combining and fixing bone fragments with the regulation of tensile force, US patent N 5087258, 5А61 F5 / 04, 920211, volume 1135 N 2, РЖ ИСМ, 7-17-93, pp. .87 containing rings, rods, threaded rods, brackets, trims,, distraction rods, knitting needles, bolts, nuts, spoke holders. Such a device can be effectively used to combine fragments of the tubular: bones along the axis of the bone. Rotational and angular movements of fragments are difficult, because it is necessary to rearrange the rods and spokes on the ring supports.

A close design to the claimed object is a device for reposition, compression and fixation of bone fragments, and.with. N 1301395, MKI 4 A61B 17/58, publ. 04/04/07 bul. N 13, consisting of an outer bracket and an inner bracket and equipped with two repair units, each of which contains a base with rotary screws connected in pairs. One of the lead screws is connected to a threaded rod, which has a threaded hole and a smooth hole, a L-shaped bracket. When the lead screw rotates, the rod moves along it and is fixed by the stop rod. The threaded rods are fixed and moved using nuts.

Recognizing Ie nodes allow fairly accurate fusion and fixation of bone fragments, however, using two repair nodes, it is possible to bring bone fragments closer only in two planes. In addition, these repair nodes remain on the human limbs for the entire treatment period, increasing the weight of the compression-distraction device and causing inconvenience to the patient.

 4 The closest conotruction to the claimed object is the Rod apparatus for lengthening the long tubular jaws of A. with. N E050839, OBAAB 17/66, publ. 12/27/95, bull. N 36, comprising a distraction unit with a threaded rod and rods for osteosynthesis. The apparatus is equipped with a rotary clamp of the rods, the distraction unit is made in the form of a guide bar and a slider connected by a threaded rod with the ability to move the slider along the bar, while the bar and slider are made with longitudinal grooves and a groove} 1I for rotary clamps. The device is equipped with rotary latches with brackets mounted on a bar and a slider, moreover, the bracket is made with grooves in which rotary latches of rods are installed.

The distraction unit of this design can provide reposition of long tubular bones and distraction for elongation in only one plane, which does not provide an accurate comparison of fragments.

Clinical observations and extensive studies show that the decisive influence on the rate of adhesion is not caused by compression, but by the degree of convergence, the length of the contact and the stable deprivation of the fragments. The denser the fragments are shrunk and the smaller the gap between the n1-shea along the entire length of the plane;: the spine of the fracture and the better the immobility of the fragments, the faster the fracture heals. This is fully consistent with modern general principles of treating bone fractures (A.V. Kaplan. Closed injuries to bones and joints. Second supplemented and revised edition, ed. Medicine, M, 1967, p. 46).

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The aim of the proposed invention is to improve the accuracy of matching bone fragments throughout the fracture area.

This goal is achieved by the fact that, in the device for the repartition of JUSTICE of fragments containing supporting elements, threaded rods, distraction rods in the spheres of screw joints, bolts, nuts, supporting elements are made in the form of sliders, in the grooves of which are installed with the possibility of lateral movement with subsequent fixation spherical hinges, and ca1u1i sliders are connected by threaded rods with the possibility of longitudinal movement with subsequent fixation.

Achieving this goal - improving the accuracy of matching fragments over the entire fracture area and increasing ease of use is ensured by the fact that the supporting elements are made in the form of sliders, in a groove: which are mounted with the possibility of lateral movement and subsequent fixation of spherical joints.

This allows you to change the position of bone fragments in two planes, along the axis of the bone and in the plane perpendicular to the bone axis, to rotate bone fragments around the axis of the bone and angular movements along the axis of the bone in a small limit;

The connection of the sliders with threaded rods with the possibility of longitudinal movement with subsequent fixation allows the movement of bone fragments in axial direction along the bone.

The movement of bone fragments in all three planes with the possibility of rotation (torsion) and angular movements allows you to compare: the remaining fragments with a high degree of accuracy over the entire fracture area.

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Figure 1 shows a device for the reproduction of bone fragments, General view.

Nz FIG. 2 shows a device for reposition of bone fragments, top view.

Figure 3 shows a device for reposition of bone fragments, side view.

A device for reposition of bone fragments contains support elements 1, threaded rods S, distraction rods 3, 4 in spherical hinges 5,6, bolts 7,8,9,10, ha1zh.i 11, 12, 13, 14. The supporting elements 1 are made in the form of sliders 15, 16 in the groove: 17, 18 of which are mounted with the possibility of lateral movement with subsequent fixation of the bolt, 1 and 6 and 9 are spherical hinges 5,6, and the sliders 15,16 are connected by rods 2 with the possibility of longitudinal movement with subsequent fixation.

To ensure lateral movement of the spherical joints of 5.6 in 17.18 of the sliders 15, 16, under the heads of the bolts 9, 10 are installed planes 19, 20.

The transverse movement can be carried out with a special removable wrench 21, containing a screw 22 with a head 23, for example, in the form of a flap.

The proposed device for reposition of bone fragments is used as follows.

Using a conductor, install distraction rods 3 and 4 on the bone fragments as close as possible to the fracture, but not closer than 15 mm, perpendicular to the bone fragment: axes and on the same line of the last 1B,

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Install the distraction rods 3 and 4 with spherical joints 5 and 6 at the same distance from the bone fragments using the IS and 13 nuts. On the sliders 15 and 16, install the spherical joints 5 and 6 with the distraction rods 3 and 4 using bolts 9 and 10 in U33SX 17 and 18 through strips 19 and 20. Connect the sliders 15 and 16 to each other with threaded rods 2 using nuts 11 and 14.

Fragmentation of bone fragments along the axis of the bone is carried out by moving the sliders 15 and 16 along the rods of the threaded l 2 with the help of nuts 11 and 14. The approach of the bone fragments in the plane of the perpendicular axis of the bone is carried out by moving the spherical joints 5 and 6 with the rods distraction 3 and 4 relative to the sliders 15 and 16.

In this case, the bolts 9 and 10 are moved into the groove: -; 17 and 13 of the sliders 15 and 16, and the strap - 19 and 20 hold the heads of the bolts 9 and 10. Moving can be done using a special removable key 21. which is worn on the heads of the bolts 9 and 10, alternately from one 1-1 or the other side.

Turning the screw 22 of the key 21 move the spherical hinges 5 and 6 relative to the sliders 15 and 16-.

The angular displacement of bone fragments is carried out by angular displacements of the distraction rods 3 and 4 in a spherical hinge /: followed by fixation with bolts 7 and 8.

Rotaschso is produced by simultaneously moving the spherical joints 5 and 6 in the transverse direction relative to the sliders 15 and 16 and by angular movements of the distraction rods 3 and 4 in the transverse direction.

- 6 Such dosed movements of bone fragments allow precise matching of bone fragments and provide contact over the entire area of the fracture, which contributes to an earlier recovery;

After a complete comparison of bone fragments at the fracture site, one of the needle rods is applied using a known technique.

The rods of the reponent device can be used in the construction of the superimposed spoke-rod apparatus by fixing it to the rings :, while the reponent device is removed.

It is possible to leave the re-grinding device at the fracture site, which, together with the spoke-rod apparatus, will additionally stabilize the fracture site.

The use of the proposed device for the reposition of bone fragments provides an accurate contour: t over the entire surface of the junction of the bones, which leads to better conditions for the regeneration of bone tissue, and as a result, to a faster joint of the F-fracture.

Claims (1)

A device for reposition of bone fragments containing supporting elements, threaded rods, distraction rods in spherical joints, bolts, nuts, characterized in that the supporting elements are made in the form of sliders, in the grooves of which are mounted with the possibility of lateral movement with subsequent fixation of spherical joints, and the sliders are connected by threaded rods with the possibility of longitudinal movement with subsequent fixation.