RU2294713C2 - Attachment for intra-bone osteosynthesis made on animals - Google Patents

Abstract

FIELD: veterinary; surgical instruments for veterinary.

SUBSTANCE: attachment can be used for curing damages in animals' bone. It intends for use as additional aid for performing intra-bone osteosynthesis of shoulder and ankle bones. By means of attachment the apparatus' module is fixed stable at required position during operation. It can be also used in experimental medicine for modeling breaks. Attachment has support made in form of frame. Two sides of frame are made in form of telescopes, and two other sides are made in form of T-shaped planes. Screw-shaped plank is attached to any vertical surface of T-shaped planes for movement. Screw-shaped plank is connected by hinge with other screw-shaped plank. Any screw-shaped plank is provided with openings. Rib of hardness is fixed inside frame. Posts are fastened to any end of telescopes; posts are provided with rubber areas at the ends. Doctor's hands keep free during manipulations; he/she is able of adjusting height and length of structure depending on size of animal or driving supports of apparatus in motion during manipulation and of doing traction of bone fractures in apparatus.

EFFECT: improved efficiency of operation.

2 cl, 4 dwg

Description

The invention relates to veterinary medicine, in particular to surgical instruments intended for veterinary purposes, in the treatment of injuries of animal bones, is directly intended to be used as an additional device when performing transosseous osteosynthesis of the bones of the forearm and lower leg with the help of which the module of the device is stably fixed in the desired position during surgery; it is possible to use the invention in experimental medicine for modeling fractures.

Known prefix to the apparatus of transosseous fixation, which is aimed at preventing the displacement of soft tissues on the knitting needles, containing a pelot mounted on soft tissue near the knitting needles, the orientation of which is carried out by means of a rod, a rod and a spherical articulation (A. S. 1553095 USSR. Publ. 30.03. 1990).

However, the known invention is not intended to be used as an additional device on the operating table during transosseous osteosynthesis, since it is only an auxiliary tool for stabilizing bone fragments for the period of fracture consolidation in the transosseous fixation apparatus.

A device for fixing the upper limb, which serves to perform an osteotomy of the stumps of short tubular bones without damaging the remaining anatomical formations of the hand, containing a base with a hinged body using guides connected to the forearm lodgement (A.S. No. 1524877 USSR. Publ. 30.11.1989).

However, this device is designed to hold the forearm and phalanges of the fingers during osteotomy of stumps of short tubular bones and cannot be used due to design features, to orient the supports of the apparatus and bone fragments in the required position on the operating table.

A device is known for fixing the forearm during osteosynthesis according to Ilizarov, which allows you to free the assistant’s hands for more useful manipulations, quickly and correctly install the cassette for radiographs, and thereby reduce the time of the operation, containing the base, the swivel joint, the fixation unit to the proximal support of the apparatus (transosseous osteosynthesis according to Ilizarov in case of diaphyseal fractures of the forearm bones: methodological recommendations / VKRC "WTO"; comp .: G.A. Ilizarov, S.I.Shved, K.U. Kudzaev - Kurgan, 1990. - 21 pp.).

However, the known device due to its design features is not intended for use in transosseous osteosynthesis of animals for the following reasons: laying the animal on the operating table in a lateral position, the inability to adjust the height of the structure, the absence of axial movements and stable fixation of the apparatus supports.

A known method and stand for applying a compression-distraction apparatus used in osteoarticular surgery and intended for the treatment of injuries and diseases of limb bones. The support contains a base with racks for fixing the apparatus and limbs, each of the racks for fixing the apparatus is made in the form of a rod on which a U-shaped bracket is pivotally mounted, and each of the racks for fixing the limbs is made in the form of a rod with an arched lodgement, racks are placed in a longitudinal groove of the base with the ability to move along and across it and in a vertical plane (AS No. 910153 of the USSR. Publish. 07.03.1982).

However, the known invention due to its design features cannot be used on the operating table in animals due to its large dimensions. In addition, the location of the animal in a lateral position during surgery and the restriction of movement in the shoulder and hip joints do not allow to fix the limb with the imposed apparatus in a known stand.

The objective of the present invention is to develop an attachment for transosseous osteosynthesis of the forearm and lower leg in animals, which allows the assistant to free the hands from holding the supports of the apparatus and to perform other manipulations during osteosynthesis, to adjust the height of the structure depending on the size of the animal, to stably fix and perform axial movements of the supports of the apparatus, unobstructed traction of bone fragments in the apparatus.

The problem is solved in that in the prefix for transosseous osteosynthesis in animals, containing a support, threaded rods and lodgements, the support is made in the form of a frame, in which two sides are made in the form of telescopes, and the other two in the form of t-shaped planes, this, on each of the vertical planes is fixed, with the possibility of movement, a screw bar connected by a hinge to another screw bar, each of the screw bars is provided with holes, in addition, a stiffener is fixed inside the frame, and each m telescopes of all rack mounted in a telescope equipped with a rubber on the end of the platform.

It is advisable to prevent slipping when using the console on the operating table to perform a rubber pad in the form of a circular "suction cup".

The present invention is illustrated by a detailed description, an example embodiment of the invention and illustrative material, on which:

Figure 1 - diagram of the console for transosseous osteosynthesis in animals;

Figure 2 - view I is a diagram of the fixation of the screw bars to the supports of the apparatus and the console;

Figure 3 - diagram of the position of the apparatus for transosseous osteosynthesis and bone in the console;

Figure 4 - diagram of the flexion movements of bone fragments in the console.

The prefix for transosseous osteosynthesis in animals contains support 1 (Figure 1). The support 1 is made in the form of a frame. Two lateral sides are made in the form of telescopes 2 and 3. Two other lateral sides are made in the form of t-shaped planes 4 and 5. In this case, each of the vertical planes is fixed by a bolt joint 6 and 7 (not shown) with the possibility of moving the screw bars 8 and 9 (not shown) (Figure 2). Each of the screw bars 8 (9) is connected via a hinge 10 and 11 (not shown) to another screw bar 12 and 13 (not shown). Screw bars 8, 9, 12, 13 are provided with holes. Threaded rods 14 can be fixed in the holes of the slats 12 and 13, on which the supports of the apparatus for transosseous osteosynthesis of an animal are located.

In addition, inside the support 1, a stiffening rib 15 is fixed (Figure 1). At each end of the telescopes 2 and 3, stands are fixed in the form of telescopes, respectively 16, 17, 18, 19, equipped with a rubber pad, respectively, 20, 21, 22, 23.

It is advisable to prevent slipping when using the console on the operating table to perform a rubber pad in the form of a "suction cup".

The prefix is used as follows.

Before surgery, an attachment for transosseous osteosynthesis is installed on the table. To do this, put the console on four racks in the form of telescopes with a rubber pad in the form of a circle. The module of the apparatus with threaded rods elongated on both sides is fixed in the holes of the screw bars located on a vertical surface. Then the animal is placed in a lateral position from the side of a healthy limb and with the help of four telescopic racks the height of the console is adjusted. During the operation, the assistant holds the limb perpendicular to the supports of the apparatus, while the operator holds two spokes at the proximal and distal levels of the segment, fixing them in the corresponding supports. As a result, the limb is fixed in the module of the device, which allows you to free the hands of an assistant for active participation in further manipulations. It is possible to move the bone fragments along the length to carry out the traction of the supports of the apparatus with threaded rods, and the sides located on the console in the form of telescopes allow this action to be freely performed. For the convenience of holding and fixing the knitting needles, as well as other actions by the operator, axial movements of the apparatus supports in the attachment are possible, which are carried out by dissolving helical strips located on the vertical surface of the t-shaped planes. In addition, the prefix allows the flexion movements of the supports of the apparatus to be carried out, for this it is necessary to dissolve the hinge assembly formed by two screw-shaped slats and carry out the necessary manipulations, for example, fracture modeling by flexion.

The proposed attachment for transosseous osteosynthesis in animals allows: to free the assistant’s hands from holding the supports of the apparatus and to perform other manipulations during osteosynthesis, to adjust the height and length of the structure depending on the size of the animal and the size of the segment, to stably fix and perform axial movements with the supports of the apparatus, to freely perform traction of bone fragments in the apparatus.

The proposed prefix for transosseous osteosynthesis of the bones of the forearm and lower leg in animals can be used to treat fractures and create an experimental model of various fractures.

This prefix is used in the State Research Center "WTO" them. Academician G.A. Ilizarov in the Department of Experimental Traumatology and Orthopedics.

Claims (2)

1. The prefix for transosseous osteosynthesis in animals, containing a support, characterized in that the support is made in the form of a frame, in which two sides are made in the form of telescopes, and the other two in the form of t-shaped planes, while on each of the vertical surfaces t-shaped planes are screw-fastened fixed with a hinge, connected by a hinge to another helical-shaped bar, each of the helical-bar is provided with holes, in addition, a stiffener is fixed inside the frame, and on each of AEC telescopes mounted rack equipped with a rubber pad ends. 2. The prefix according to claim 1, characterized in that the rubber pad is made in the form of a circular "suction cup".

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