RU189410U1 - COMPRESSION-DISTRACTION ROD DEVICE FOR THE INTERTRACIAL OSTEOSYNTHESIS OF UNSTABLE FRACTURES OF THE HEADS OF THE VENTRIC BOSES - Google Patents

Abstract

The apparatus for distraction osteosynthesis of the hand bones in the treatment of unstable fractures of the heads of the metacarpal bones of the hand includes modules with attachment points for external spokes mounted with the possibility of movement and fixation on the threaded rods. Each module is made in the form of a flat plate with three holes to the size of the rods, the holes are placed parallel to the long side of the plate, in two of which the rods are fixed with the possibility of longitudinal movement. Knitting points in the form of a screw-nut pair are installed in two holes parallel to the other long side of the plate. From the side of the screw head through its diameter, a through hole is made to the size of the spokes with the possibility of fixing a single spoke in both attachment points. 3 hp f-ly, 2 ill.

Description

The invention relates to medicine, namely to traumatology and orthopedics, it can be used in the operative treatment of comminuted, comminuted, compression and other

Devices for transosseous osteosynthesis allow to stabilize bone fragments, create distraction and compression between them, provide the necessary rigidity of fixation. Threaded connections (screw-nut) provide distraction and compression forces between the supports. Various solutions are described in this part (see, for example, the review in patent RU 2663636 C1, the Russian Research Center Restorative Traumatology and Orthopedics named after academician GA Ilizarov, August 7, 2018).

The closest analogue is the apparatus for distraction osteosynthesis of the bones of the hand and foot (RU 2508063 C2, 02.27.2011 41 containing two or more core modules interconnected by a threaded rod, which allows the core modules to move along it. Each of the core modules includes a housing and fixtures transosseous rods. The case of each rod module is provided with straps with a longitudinal through groove, in which the clamps of transosseal rods are fixed with the possibility of linear and angular movement. to at least one of the core modules is provided with a compression-distraction nut with radial openings wrench installed in the groove of the housing on the threaded rod, made with anti-friction chamfers along the entire length.

The disadvantages of the closest analogue is the complexity of the design of the device management node in the treatment process.

This utility model aims to simplify the design while ensuring stable fixation of bone fragments.

Patented apparatus for distraction osteosynthesis in the treatment of unstable fractures of the heads of the metacarpal bones of the hand includes modules with attachment points for external spokes mounted with the ability to move and fix on the first threaded rod.

The difference is that the device contains a second threaded rod, each module is made in the form of a flat plate with three holes to the size of the rods, the holes are placed parallel to the long side of the plate, two of which have bars with the possibility of longitudinal movement.

Spokes attachment points in the form of a screw-nut pair are installed in two holes parallel to the other long side of the plate, while a through-hole for the size of the spokes is made from the screw head side with the possibility of fixing a single spoke in both attachment points.

The module can be made in the form of a plate with rounded edges measuring 24 by 18 (mm), with the rods having a length of 120-130 mm and an M4 thread. The device can have from two to four modules, and the diameter of the spokes is from 2 to 3.5 mm, and their length is 100-110 mm. The apparatus may further comprise a third bar, identical to the first two.

The technical result is to simplify the design while ensuring stable fixation of bone fragments, in particular in case of metaepiphyseal fractures.

The essence is illustrated by drawings, where in FIG. 1 shows a general schematic view of a compression-distraction apparatus for transosseous osteosynthesis; in fig. 2 - side view, no needles.

The compression-distraction apparatus contains two threaded rods 1.2, on which the hexagon nuts 3 are mounted. Modules 4 are located on the rods, their number is 2-4 pieces. and more). Each module 4 is made in the form of a flat plate 5 with three holes 6 to the size of the rods 1.2. Holes 6 are placed parallel to the long side of the plate 5, in two holes with nuts 3 with the possibility of longitudinal movement fixed rod 1,2, It is possible to use the third identical reserve rod, which is fixed in the holes 6.

Nodes 7 fastening spokes in the form of a pair of screw-nut 8 are installed in two holes 9 parallel to the other long side of the plate 5. At the same time from the screw head 8 along its diameter there is a through hole 10 with a diameter of 2 (3.5) mm to the size of the needles 11 s the possibility of fixing the end of a single needle in both nodes 7 attachment.

The spokes are made of stainless steel X18H10T stainless steel, have a length of 100 mm and a diameter of 2-3.5 mm, which gives less invasiveness to the surrounding fabric.

The apparatus is used as follows.

For the treatment of comminuted, impacted, and other fractures of the heads of the metacarpal bones of the hand, first, a closed reposition of fragments is performed, after which transosse needles are held in the fragments, which are fixed in the modules of the apparatus in the required position. Mounted apparatus for 5-6 weeks. If necessary, only the fixation apparatus for distraction osteosynthesis of the hand bones is assembled from the threaded rod of two or more fixing modules, and if necessary, compression and / or distraction is added to the package one or more modules.

Claims (6)

1. Apparatus for distraction osteosynthesis of bones of the hand in the treatment of unstable fractures of the heads of the metacarpal bones of the hand, including modules with attachment points for external spokes, installed with the ability to move and fix on the first threaded rod, characterized in that it contains a second threaded rod, each module is made in the form of a flat plate with three holes for the size of the rods, the holes are placed parallel to the long side of the plate, in two of which the nuts are fixed with the possibility of longitudinal movement, knitting needles in the form of a pair of screw-nut are installed in two holes parallel to the other long side of the plate, while from the screw head along its diameter there is a through hole for the size of the needles with the possibility of fixing a single spoke in both attachment points. 2. The apparatus according to claim 1, characterized in that the module is made in the form of a plate with rounded edges measuring 24 × 18 (mm), with the rods having an M4 thread and a length of 120-130 mm. 3. The apparatus according to claim 1, characterized in that the apparatus has from two to four modules, while the diameter of the spokes is from 2 to 3.5 mm, and their length is 100-110 mm. 4. The apparatus according to claim 1, wherein the apparatus further comprises a third bar, identical to the first two.

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