SU1217396A1 - Arrangement for alternate dynamic compression of bone fractures - Google Patents

Description

The invention relates to medical technology used in traumatology and orthopedics.

The aim of the invention is to stimulate the formation of callus.

FIG. 1 shows a device for variable-dynamic compression of bone fractures, on which a lower limb with a fracture is mounted; in fig. 2 - the device, when exposed to the human skeleton.

The device comprises an inductor 1 {in FIG. 1 shows two inductors), the body 2 with the winding 3 of which is fixed to the base 4 of the device, and the measles 5 of the inductor 1 is fixed to the podstopnik 6 on which the rubber plate 7 is installed, and between the bark 5 and the board 8 of the base 4 on which the body 2 is mounted spring 9 is located.

The device works as follows.

A limb with a fracture after the removal of a flight elongation skeleton is immobilized with a removable plaster longuta. In order to conduct a session of pulsating loads, the patient, sn in the hypothetical Longuet, places a limb bent at the knee joint with a foot on a support 6 of the proposed device. The position of the core 5 and the height and elasticity of the spring 9 of the device are adjusted so that when you install the limb on the cradle 6, the voltage of the required magnitude and frequency applied to the winding 3 of inductor 1 using a generator of infra-low oscillations (not shown) creates the minimum insertion of the core 5 into the winding 3 of the inductor 1. This creates a minimal pulsating pressure on the foot and, therefore, on the fracture area. In order to increase the strength of the pulsating loads on the fracture area, in the course of treatment, a load of 0.5 to 10-15 kg is placed on the patient's knee in the form of bags with sand. As a result, the compression of the spring 9 and the extension of the core 5 from the windings 3 of the inductor increase, which, when voltage is applied to the winding 3 of the inductor 1, increases the accelerations applied to the fracture area. Such a constructive solution of the device makes it possible to strictly dose and individualize the treatment of the patient using standard mechanical (housing, substop, inductor) and electronic (generator of low-low vibrations) devices without additional control units, which significantly increases the efficiency and reliability of the pulsating device.

The use of the proposed pulsating device is possible with the aim of stimulating the mineralization of the bone regenerate, during treatment with the gypsum layer method after the formation of a provisional bone callus (from 3-4 weeks) and after operative fixation of the fracture.

five

five

about 0

five

0

five

five

0

The advantage of the proposed pulsating device over the known one is to provide a complete, automatic, precisely controlled and dosed generation of dynamically varying load on the bone during the conservative treatment of fractures, which eliminates the risk of infectious complications and expands the scope of its use.

The proposed device can be used in the treatment of fractures of various bones (except for the upper limbs, the cervical spine and the skull) and in space medicine. It is known that one of the negative aspects of the prolonged effect of weightlessness on humans is the leaching of minerals from the bones. This is due to the exception of pulsating shock loads on the skeleton in weightlessness, the presence of which is a natural condition for normal functioning and the development of bone-tissue on Earth.

One of the means to combat the negative effects of weightlessness on the skeleton is a complex of physical activities, in particular, running on a treadmill. This exercise is performed by fixing a person to the track with the help of l moc. Apparently, taking into account the complexity of the postflight re-adaptation of man to earth conditions, the nature of these loads on the skeleton is not quite adequate. One of the reasons for this, perhaps, is that when running on a treadmill under conditions of weightlessness, the intensity of shock loads that the skeleton is experiencing on Earth does not reach, and this largely depends on the speed of the load.

When studying the adaptation of the bone under artificial stress with high and low physiological stress rates, it was found that the functional load at high stress rates is a more powerful stimulus for additional bone formation than the same alternating voltage at a lower speed.

With the help of the proposed pulsating device, it is possible to induce pulsating loads of sufficient strength on the skeleton in the required modes for various localizations of fractures, as well as under weightless conditions. For this, the proposed device is additionally equipped with a shoulder grommet 10 and a sleeve 11, connecting the shoulder girdle 10 and the base 1.

In this case, the person places the shoulder girdle 10 on his shoulders, rests his feet on the podstopnik 6 (Fig. 2), lmki 11 is adjusted in such a way that the torso is acted on by force equal to the weight of the cosmonaut on Earth. Using a generator of infra-low oscillations (not shown), a voltage of the required magnitude, shape and frequency is applied to the winding of inductor 1, which

would create the necessary mode of shock loads on the skeleton, which he experiences on Earth, for example, while running.

The advantages of the proposed device in this case are the possibility to induce any (in frequency, shape, strength) necessary shock loads on the skeleton in order to prevent its demineralization.

FIG. 2

Claims (1)

DEVICE FOR VARIABLE-DYNAMIC COMPRESSION OF PE- Figure 1 is connected to an AC source installed in the housing _g and a compression spring, characterized in that, in order to stimulate the formation of bone callus, the inductor is installed in the base made with a holder, the armature is connected to the latter, and the spring is placed in the housing between the armature and a base, which is equipped with a shoulder girdle with straps fixed at the edges of the base Q <O SU, „. 1217396