RU2238690C1 - Device for preparing rods for performing radial bone osteosynthesis - Google Patents

Abstract

FIELD: medical engineering.

SUBSTANCE: device has base having a pair of unmovable rollers and slide rails between them. A roller of greater diameter having groove along the external circle is mounted on the rollers axle. It is movable along slide rails axis and about its own axis. The device provides required bending angle corresponding to anatomical proportions.

EFFECT: enhanced effectiveness of treatment; facilitated surgeon work.

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Description

The invention relates to medicine and can be used in orthopedics and traumatology for osteosynthesis of the radial bone.

When repositioning and fixing fragments of the radius, significant difficulties arise due to the fact that the radius has a natural anatomical curvature of up to 160 degrees.

In practice, Kirschner spokes are used for osteosynthesis of the radial bone (Prince. Osteosynthesis. - L., 1974. - S.30-40). In this case, under the intraosseous or general anesthesia, a reposition apparatus of Demyanov or Daguerre is applied, reposition of bones is carried out and, under the control of x-ray, polyosteosynthesis is performed using knitting needles. The spokes are inserted through both bones perpendicularly and obliquely to the axis of the forearm, and crosswise.

Disadvantages: the duration of the restoration of rotational movements, the possibility of damage to large vessels and nerve trunks, the secondary displacement of fragments, spoke osteomyelitis, pressure sores, repeated operations.

It is also known that the introduction of Bogdanov rods in open osteosynthesis in the case of diaphyseal fractures of the radial bone. The rod has a rectilinear shape that does not take into account the anatomical curvature of the radius.

For the prototype, we adopted the curved rod of Bogdanov (patent for invention No. 2001720). The core is bent “manually” in preparation for an operation so that it repeats the natural anatomical curvature of the bone.

Disadvantages: the complexity, the possibility of technical errors, in this regard, the delayed consolidation of fragments of the radius.

Tasks:

- Improving the effectiveness of treatment by restoring the anatomical shape of the radius and the volume of supination-pronational movements of the forearm, as well as reducing postoperative complications.

- Elimination of the possibility of damage to blood vessels and nerve trunks during surgery.

- Simplification of the operation while improving the anatomical and functional effect.

- Creating more rigid fixation of bone fragments in the fracture area due to congruence of the arches of metal and bone.

- Reducing the frequency of delayed consolidation of fragments.

- Reducing the incidence of false joints during treatment.

- Creating conditions for more rigid fixation of bone fragments in order to achieve optimal conditions for reparative regeneration of bone tissue at the fracture site.

- Reduced doctor’s labor costs.

The technical essence of the proposal is to reduce the time of reparative tissue regeneration in the area of surgery, reduce the time of pain, create convenience in the work of the surgeon and reduce the time of his labor.

The technical novelty is that the device has a base on which a pair of rollers is fixedly mounted, between which there are slides, axially provided with a rotating roller, having a groove along its peripheral circumference for introducing the rod into it and rolling between the pair of rollers, providing an anatomical angle of bending of the rod .

For a better understanding, the device is schematically shown in Fig. 1 - front view and Fig. 2 - side view, where 1 - base, 2 - paired rollers, 3 - roller with a groove (groove), 4 - slide, 5 - screw for moving the slide on the base, 6 - the handle.

The device operates as follows. The rod is inserted to the right into the groove (groove) of the rotating roller of larger diameter 3, located on the base 1. Using screw thread 5 with the handle 6 along the slide 4, the roller 3 is brought closer to the rollers 2 and the rod is rolled. In this case, it is deformed and acquires a given curvature, determined in advance using an X-ray. The radius of curvature is set by the position of the roller 3 relative to the rollers 2 and is controlled on a scale applied to the base.

Using the device allows to reduce the time of reparative tissue regeneration in the field of surgical intervention, the time of pain, to ensure reliable receipt of a given curvature of the rod, to improve the working conditions of the surgeon.

Testing of the device confirmed an increase in the therapeutic effect compared with the basic method of preparing the rod for radial bone osteosynthesis.

Claims (1)

Device for preparing rods for osteosynthesis of the radial bone, characterized in that it has a base on which a pair of rollers are fixedly mounted, between which there are slides, on the axis of which a larger diameter roller is located and having a groove along its peripheral circumference for introducing a rod into it and rolling between the rollers, providing an anatomical bending angle of the rod.

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