SU1375251A1 - Arrangement for osteosynthesis - Google Patents

Abstract

The invention is intended for traumatology and orthopedics. The purpose of the invention is to provide the possibility of correcting the angular, deformation of the tubular bones and improving the reliability of fixation of fragments in the postoperative period. The device comprises a plate 1, on the side of which the petals 2 are made, bent in different directions; On the other hand, the plate 1 is fixed grippers 3 in the form of half-rings, which are bent in different directions. The device increases the strength of osteosynthesis by 2 times and can be used during late osteosynthesis operations. The timing of bone debris is reduced by 2-4 weeks. . 5 il. (C (L

Description

with

SP

Yu

SP

F1 / g.1

The invention relates to medicine, namely to traumatology and orthopedics, and can be used in the treatment of fractures of tubular bones. The purpose of the invention is to provide the possibility of correcting the angular deformation of tubular bones and increasing the reliability of fixation of fragments during late osteosynthesis.

FIG. I shows a device for osteosynthesis, axonometrics; Fig. 2 is the same after deformation in the cooled state; in fig. 3 - the same, the working position during late osteosynthesis of oblique fracture of the humerus bone, axonometric; in fig. 4 - the same cross section; in fig. 5 - the same, established for correcting the angular deformation in case of an incorrectly growing fracture of the femur, the working position.

The device for osteosynthesis contains a plate I, on one of the sides of which there are petals 2, on the opposite side of the plate 1 there are fastened clamps 3 in the I form oriented towards two semirings and arranged in chess order relative to the petals.

The device is applied as follows.

For late (over 3 weeks) osteosynthesis, for example, an oblique fracture of the humerus during a single stage, the fracture site is exposed, the scar tissue is removed and bone fragments 4 and 5 are compared. In both bone fragments in the longitudinal direction through fracture line 6 A groove 7 is cut through, the length of which corresponds to the length of the device chosen for osteosynthesis. For 5-10 s, the device for osteosynthesis is opoused with chloroethyl, cooling it to a temperature below + 10 ° C. Using, for example, cramping forceps, the petals 2 of the plate 1 are partially folded and the ring-shaped grippers 3 are partially unbendled. Then the reduced petals 2 of the plate 1 are immersed in the previously sawn groove 7, and the ring-shaped grips 3 are placed on the lateral side of the bone fragments. The device is kept in this position for 20-30 s. During this time, in connection with the contact heating of titanium nickelide to 35 ° C, the memory effect of its shape manifests itself, and the petals 2 of the plate 1 are consumed in different directions and cut into

the bone fragments in the walls of the medullary canal, and the ring-shaped grips 3 tightly wrap the bone fragments laterally, simultaneously ensuring deeper penetration of the petals into the wall of the medullary canal. At the same time, the bone is actually clamped on two sides: between the lobes 2, which are located in the medullary canal, and the annular grips 3, located on the surface of the bone. Due to this, very strong fixation of bone fragments is ensured.

In the case of, for example, an abnormally growing fracture of the diaphysis of the femur with angular deformation between the fragments during the operation, the fracture site is exposed. In both bone fragments saw through the longitudinal grooves 7, joined with each other in the area of the fracture. Then, in the same way as with osteosynthesis of an oblique fracture of the humerus, the petals 2 of the plate 1 and the clamps 3 of the device for osteosynthesis are deformed, with the only difference being that they simultaneously bend the same plate 1 in the middle part to the angle corresponding to the angle of deformation of the bone fragments 4 and 5 of the femur. Subsequent actions are carried out as in the case of an oblique fracture of the humerus, however, in this case, the memory effect of the titanium nickelide form not only ensures the operation of the petals 2 and annular grips 3 of the device, but also the middle part of the plate 1. The latter tends to take its original shape and at the same time it develops efforts aimed at correcting the angular deformation of the bone fragments 4 and 5. The plate continues to work in the postoperative period, as a result of which there is a gradual correction of the angular deformation to stnyh fragments that srastayuts in the correct position.

After adhesion of the fracture, the device is removed as follows. A portion of its plate 1 protruding from the bone and ring-shaped grippers 3 are exposed and irrigated with chloroethyl in the wound, as a result of which titanium nickelide becomes plastic. After this, the annular grippers 3 are unbendled and plate 1 is easily removed from the bone.

The proposed device for osteosynthesis increases the strength of osteosynthesis by two times and, moreover, provides correction of angular deformations of bone fragments during late osteosynthesis, resulting in a 2-4 week reduction in terms of bone fragments, and can be widely used in traumatology and orthopedics .

Claims (1)

Invention Formula An osteosynthesis device comprising a plate made of a memory effect material with a series of petals Hai of one of the sides, 3 FIG 3 oppositely bent, characterized in that, in order to provide the possibility of correcting the angular deformation of the tubular bones and improving the reliability of fixation of fragments during late osteosynthesis, it is equipped with a number of grips distributed along the plate, arranged in a checkerboard pattern with respect to the petals, each gripper being suspended in the form of oriented towards two half-rings, one end rigidly articulated with the other side of the plate. FIG. 2 3 1