RU4228U1 - DEVICE FOR REGULATING REPAIR BONE STEEPING - Google Patents

Abstract

1. A device for regulating reparative bone formation, containing supports connected by distraction rods, spokes, biologically inert tubes, characterized in that it is equipped with two biologically inert tubes, each of which has a beam of implantable electrodes connected via a connector fixed to one of the rods and connected by electrical communication with the electronic control unit, while the beams of implantable electrodes are located towards each other. 2. The device according to claim 1, characterized in that each of the implantable electrodes is made in the form of a nitinol rod coated with a polyurethane sheath, equipped with four conductive sections isolated from each other, one of which is located at the end of the sheath, with the other end having four conclusions. 3. The device according to claims 1 and 2, characterized in that the electronic control unit for electric potentials contains interconnected by electric voltage voltage polarity generator, voltage level regulator, switch, timer and power source.

Description

A 61 N1 / 36 A 61 B17 / 66

DEVICE FOR REGULATING REPAIR COSTOGRAPHY EDUCATION

The utility model relates to medical equipment, namely to devices used in orthopedics and traumatology, in particular, to devices used in the electrical stimulation of bone tissue regeneration processes.

Known implantable electrode containing a rod enclosed in a shell of insulating absorbable biologically inert material, while on the opposite sides of the shell two conductive metal layers are applied, and the rod is made of a bone allograft (AS 736984 USSR. Implantable electrode, publ. 30.05. 80 g. Vul. N20).

A device for influencing the reparative regeneration of bone tissue, containing two electrodes connected to a current source, and a metal rod in which the electrodes are made in the form of a tape and are located on the outside of the clutch (AS 856461. USSR. Device for influencing the reparative bone tissue regeneration, published on 08.23.81 g. Vul. N31).

However, the design of the known device provides only an acceleration of the process of reparative regeneration of bone tissue in the area of the bone corresponding to the length of the sleeve installed in the medullary canal, and is not intended to regulate the process of reparative bone formation directly in the area of the plane of fracture of the bone during the formation of regenerate in it.

a device that allows to optimize the process of formation of bone regenerate including distraction by acting on the regenerating bone tissue with electric potentials of different polarity and duration.

The problem is solved in that the device for regulating reparative bone formation, containing supports connected by distraction rods, spokes, biologically inert tubes, is equipped with two biologically inert bushings, each of which has a beam of implantable electrodes connected through a connector fixed to one of the rods and connected by electrical communication with the electronic control unit of electric potentials, while the beams of implantable electrodes are located towards each other.

In addition, for a more complete overlap of the bone fracture plane, a beam of implantable electrodes is used, each of which is made in the form of a rod of nitinol coated with a polyurethane sheath, equipped with four insulated conductive sections, one of which is located at the end of the sheath, and the opposite end of the latter is equipped with four leads connected by electrical connection with conductive sections and connected to the plug.

To regulate the process of reparative bone formation, the electronic control unit for electric potentials contains a voltage polarity generator, voltage level regulator, a switch, a timer, and a power source interconnected by electric communication.

women on whom:

FIG. 1 shows a device for regulating reparative bone formation, made according to a utility model, general view;

FIG. 2 - a longitudinal section of the bone with installed electrodes implantable in the fracture zone;

FIG. 3 - a transverse incision of the bone with installed electrodes that overlap the plane of the fracture;

FIG. 4 - implantable electrode, general view;

FIG. 5 is a circuit diagram of an implantable electrode;

FIG. 6 illustrates a block diagram of an electronic power control unit.

A device for regulating reparative bone formation contains arc supports 1 and 2 (Fig. 1), on which spokes 3 and 4 are fixed with a cross, fixing fragments of the operated bone. Supports 1 and 2 are interconnected by distraction rods 5 and 6. On the latter, connectors 7 and 8 are fixed, connected to bundles of implantable electrodes 9 and 10, connected by biologically inert tubes I and 12. In addition, connectors 7 and 8 are connected by electrical connection to the electronic unit control electric potentials 13. In this case, the beams of implantable electrodes 9 and 10 (Fig. 2, 3) are located towards each other.

Each of the implantable electrodes 9 and 10 (Fig. 4) is made in the form of a rod 14 of nitinol, insulated by a sheath 15 of polyurethane. The latter is provided with conductive sections 16, 17 and 18. A conductive section 16 is located at the end of the shell 15. The other end of the shell 15 is provided with four leads 19, 20, 21, 22. The shell 15 and the conductive sections 16, 17 and 18 (Fig. 5) are connected with four pins 19, 20, 21, 22.

Connectors 7 and 8 (Fig. 6) are connected to an electronic block 13 for controlling electric potentials, in which voltage polarity generator 23 is interconnected by voltage regulator 24, voltage level regulator 24, switch 25, timer 26 for supplying voltage to the electrodes, power supply 27 connected to timer 26 and a switch 25. The latter through connectors 7 and 8 is interconnected with implantable electrodes 10 and I.

A device for regulating reparative bone formation works as follows.

The patient undergoes surgery for transosseous osteosynthesis. Supports 1 and 2 (Fig. 1) of the transosseous fixation apparatus are imposed on the damaged limb segment. On the planes of supports 1 and 2, the ends are fixed that were crossed through fragments of the damaged bone, knitting needles 3 and 4. In the fracture zone, implantable beams of electrodes 9 and 10 are installed. For this, after local anesthesia, skin is inserted through the punctures and soft tissues of the operated limb into the fracture zone towards each other biologically inert tubes And and 12 to contact with the cortical layer of bone. Through biologically inert tubes 11 to 12, beams of implantable electrodes 9 and 10 are introduced into the fracture zone, which, after being introduced into the fracture zone (Figs. 2, 3), are straightened and assume a predetermined arcuate shape, thus covering the entire plane of the fracture.

The contacts of the implantable electrodes 9, 10 (Fig. 4, 5) are connected to the switch 25 of the electronic block 13 for controlling electric potentials, from which the potential of the required polarity, magnitude and duration is supplied to each of the four conductive sections 16, 17, 18 of each implantable electrode 9, 10 , guided by x-ray data obtained at various stages of the formation of coot regenerates.

The proposed water supply provides electric potentials of different polarity, a certain size and duration to the regeneration formation zone. The positive electric potential, stimulating reparative bone formation, provides in the area around the positively charged conductive sections of the implantable electrodes an increase in bone tissue regeneration and an intensification of the mineralization process, as a result of which a more mature and uniform bone regenerate is formed in those areas where it is functionally necessary, for example, in the zone of cortical plate formation. Negative electric potential, on the contrary, inhibits reparative bone formation and slows down the mineralization of newly formed bone tissue. Moreover, in the area around negatively charged conductive sites of implantable electrodes, bone formation slows down, bone tissue is resorbed, and organotypic rearrangement of regenerates is stimulated and, in particular, the formation of the bone marrow canal is accelerated.

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Claims (3)

1. A device for regulating reparative bone formation, containing supports connected by distraction rods, spokes, biologically inert tubes, characterized in that it is equipped with two biologically inert tubes, each of which has a beam of implantable electrodes connected via a connector fixed to one of the rods and connected by electrical communication with the electronic control unit, while the beams of implantable electrodes are located towards each other.  2. The device according to p. 1, characterized in that each of the implantable electrodes is made in the form of a rod of nitinol, coated with a polyurethane shell, equipped with four conductive sections isolated from each other, one of which is located at the end of the shell, the other end of the last equipped with four conclusions. 3. The device according to PP.1 and 2, characterized in that the electronic control unit for electric potentials contains interconnected by electric voltage voltage polarity generator, voltage level regulator, switch, timer and power source.