RU163691U1 - DEVICE FOR TREASURE OSTEOSYNTHESIS IN MAMMALS - Google Patents

Abstract

Apparatus for transosseous osteosynthesis in mammals, including external supports and distraction telescopic rods mounted on supports, characterized in that each distraction telescopic rod consists of a distal telescopic knee, a middle knee, a proximal threaded knee and a sleeve for moving the proximal threaded knee, wherein the proximal threaded knee having a threaded connection with the movement sleeve of the proximal threaded elbow is connected to the middle elbow, then to a true telescopic knee with the ability to move apart and move along one another, and lockable ball joints are installed on opposite ends of the telescopic rod, consisting of a body, a ball pin with a threaded end and a locking bolt, and the ball joint body is connected to the proximal threaded knee by a threaded joint, and with a distal telescopic knee, the ball joint housing is integral.

Description

The utility model relates to veterinary medicine, namely to traumatology and orthopedics, and is used for fractures of the axial and peripheral skeleton, as well as for reconstructive operations on the bones of the peripheral skeleton in mammals of various sizes and body weights, as well as in large birds.

Known (see Pat. 2352283, RU, IPC A61B 17/56) apparatus for transosseous osteosynthesis of Solomin-Utekhin-Vilensky, which contains the upper and lower support in the form of rings. Each support is mounted at three points using a system of six telescopic rods. Each rod consists of a cardan, a threaded rod, a nut, a sleeve and an axis. One end of the threaded rod is connected to the cardan, and the other passes through the sleeve and is connected to it using a rotating nut. By connecting the sleeve to the cardan of an adjacent telescopic rod, the telescopic rods coming from the opposite rings are connected. Reposition and elimination of deformation are carried out by changing the lengths of telescopic rods. The disadvantage of this device is the limited reposition of bone fragments and the need to use a special computer program to calculate the magnitude of the change in the length of the telescopic rods.

Known compression and distraction apparatus “Pron-2” (see Pat. 2040219 RU, IPC A61B 17/56), in which the plates of the connecting block are connected to each other by threaded rods and monoaxial self-orientating hinges mounted on one of the plates of the connecting block and including a hollow body with a transverse through groove for a threaded rod of a ball element, a ball element with a threaded rod and a hollow locking screw. The disadvantage is the small amount of correction of angular displacements, because The structural solution of the known device allows you to adjust the angular displacement in only one plane.

Known (see URL http://abs.orthofix.it/db/resources/TL-1405-OPT-E0.pdt, 08/10/2015). The design contains external supports of the original design. Each support contains at the corners two openings for placing the rods (striations) and an opening for the screw fixing them. To connect the supports, distraction telescopic rods are used. At the opposite ends of the shaft there is a mounting pin that can be inserted into the mounting holes at the ends of the supports and held in place by a fixing screw. Rotation and distraction of bone fragments is achieved by adjusting the length of the rods and changing the angular displacements in the same plane, using a computer program. The disadvantages are the ineffective reduction of bone fragments and insufficient rigidity of fixation. The disadvantages include the inability to use standard external supports and the need to work with a computer program. In addition, this is an expensive design, it is not economical to solve the problems of osteosynthesis in veterinary medicine.

Eliminate these disadvantages will allow the device for transosseous osteosynthesis in mammals.

The technical result of the utility model is the provision of accurate and controlled reposition and fixation of bone fragments, due to the structurally embedded possibility of the full volume of repositional movements in all planes.

The technical result is achieved in that the basis of the distraction telescopic rod is made up of independent lockable spherical joints located at opposite ends of the rod. Lockable ball joints provide the possibility of multi-axis controlled movement, correction of the position of bone fragments simultaneously in three planes with six degrees of freedom, as well as stable rigidity of osteosynthesis. A distraction telescopic rod consists of 3 parts (in contrast to the known ones, consisting of 2 parts) that can be moved apart, move one along the other, which provides finer adjustment of the length of the rod.

The utility model is illustrated by illustrations. The figures depict:

FIG. 1. Apparatus for transosseous osteosynthesis in mammals, general view;

FIG. 2. Details of the distraction telescopic rod;

FIG. 3. The distraction telescopic rod assembly;

FIG. 4. Apparatus for transosseous osteosynthesis in mammals using 3 distraction telescopic rods;

FIG. 5. Connection of distraction telescopic rods with supports;

FIG. 6. The connection of two distraction telescopic rods.

The apparatus for transosseous osteosynthesis in mammals consists of external supports and telescopic distraction rods (Fig. 1). The distraction telescopic rod (Fig. 2) consists of a distal telescopic elbow 1, a middle elbow 2, a proximal threaded elbow 3, a sleeve 4 for moving the threaded elbow 3. One end of the distal telescopic elbow 1 is at the same time connected to the ball joint body 5, into which the ball pin is inserted 6 with a threaded end, fixed by a locking bolt 7. At the opposite end of the distal telescopic knee 1 is a blocking assembly 8 of the middle knee 2. At one end of the middle knee 2 there is a ring th groove 9 for the sleeve 4 for moving the threaded elbow 3. The proximal threaded elbow 3 has a threaded connection with a removable ball joint consisting of a housing 10, which is installed perpendicular to the axis of the rod, the ball pin 6 with a threaded end and is fixed with a locking bolt 7. Also, the proximal threaded elbow 3 has a threaded connection with a sleeve 4 for moving the proximal threaded elbow. The distal telescopic elbow 1, the middle elbow 2 and the proximal replaceable threaded elbow 3 in the assembled form have the ability to move apart and move one along the other. The implementation of one of the lockable ball joints removable creates the possibility of connecting several distraction telescopic rods and increases the versatility of the design (Fig. 6).

When assembling the rod on the proximal threaded elbow 3 with the lockable ball joint installed, screw the sleeve for moving the proximal threaded elbow 4, which adjusts the length of the telescopic rod. Then, the proximal threaded elbow 3 and the middle elbow 2 are mated. A ball pin 6 is inserted into the ball joint 5 of the distal telescopic elbow 1 and fixed from the outside with a blocking bolt 7. After that, the distal telescopic elbow 1 is connected to the middle elbow 2 mated to the proximal threaded elbow 3 (see Fig. 3).

The operation begins with transosseous spokes through the proximal and distal bone fragments of the mammal. After fixing the spokes on the external supports, distraction telescopic rods are installed. The threaded sleeve set the required length of the rods. A pair of independent lockable ball joints of each rod adjust the angular mixing.

Distraction telescopic rods are connected to the external supports of any arc-ring structure using a universal monoblock (Fig. 5) (see Pat. 149174 U1, RU, IPC A61B 17/56). When using 6 rods, an external fixation hexapod apparatus is formed, in which the reposition and elimination of angular displacements is carried out due to telescopic rods, as well as lockable spherical joints, which enable effective correction of multiplanar deformation and reliable fixation of the selected position. The rigidity of fixation of the locking ball joint is such that the extraction of 1-3 rods does not affect the stability of the structure (Fig. 4).

Claims (1)

Apparatus for transosseous osteosynthesis in mammals, including external supports and distraction telescopic rods mounted on supports, characterized in that each distraction telescopic rod consists of a distal telescopic knee, a middle knee, a proximal threaded knee and a sleeve for moving the proximal threaded knee, wherein the proximal threaded knee having a threaded connection with the movement sleeve of the proximal threaded elbow is connected to the middle elbow, then to a true telescopic knee with the ability to move apart and move along one another, and lockable ball joints are installed on opposite ends of the telescopic rod, consisting of a body, a ball pin with a threaded end and a locking bolt, and the ball joint body is connected to the proximal threaded knee by a threaded joint, and with a distal telescopic knee, the ball joint housing is integral.

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