SU1281260A1 - Apparatus for osteosynthesis - Google Patents

Abstract

The invention relates to external fixation devices for fractures, based on the use of rods, and reduces the fixation time of fragments. The device includes a rod 1 with grooves 2, screws 3, collet sleeves 7, fixing rods 8, swivel head 13, compression screw 9. Pin 8 pierce soft tissues to the bone, drill them. Insert at least two rods above and below the fracture. The twisting sleeves 7 firmly fix the rods 8. The swivel head 13 allows the angle of the rods to be changed. The rods 8 do not require predrilling, which significantly shortens the application time. The use of interchangeable attachment points for rods 8 with their transverse arrangement allows osteosynthesis of fractures of any location. 6 Il.

Description

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The invention relates to medical technology, namely to devices for external fixation of fractures based on the use of rods.

The purpose of the invention is to reduce the time of fixation of fragments due to the fact that one of the attachment points of the fixing rods is made in the form of a swivel head with locking studs and a clamping nut, and the fixing rods are fixed in the attachment points using threaded collet bushings.

FIG. 1 shows a device for osteosynthesis, general view; in fig. 2 - the same, top view; in fig. 3 is a section A-A in FIG. one; in fig. 4 is a section BB in FIG. one; in fig. 5 is a sectional view BB in FIG. 2; in fig. 6 is a cross-section of the FIG. 2

The device for osteosynthesis (Fig. 1) consists of a pole 1, made of a strip of rectangular cross section, provided with longitudinal grooves 2, through which screws 3 (Fig. 2) and nuts 4 pass, clamping attachment points for fixing rods 5 and 6 to the pole with threaded collet sleeves 7 (Fig. 1 and 5) and locking rods 8, the assembly for fastening the locking rods 5 through the screw 3 interacts with the compression screw 9 (Fig. 2) and provided with the shoulders 10 (Fig. 5) covering the pole 1 on both sides.

At the end of the rod 1 there is an axle screw 11 (FIGS. 2 and 4) with a nut 12, against which one of the attachment points for fixing rods, made in the form of a swivel head 13 with locking pins 14, is mounted for rotation and fixation (FIG. 4) interacting with the holes 15 radially located relative to the axis of rotation of the swivel head (Fig. 6).

Threaded collet sleeves 7 are provided with a tapered end with a cross-shaped slits 16 (Fig. 3) and are placed in nodes for fastening the locking rods 5 and 6 (Fig. 2) and 13 (Fig. 1 and 2) in a sequential order and at an angle open toward the working area of the device, the cone-shaped end of the cylindrical sleeve cooperating with the counter cone of the nodes for fastening the locking rods.

The device is applied as follows.

After the fracture is repaired, the osteosynthesis device is established along the length of the damaged bone segments, taking into account the topographic-anatomical relationship of the vessels and nerves of the fixed area. Nodes for fastening the rods

as close to the fracture zone as possible.

The locking rod 8 with its shank is fixed in the drill and inserted through

a threaded collet sleeve 7 for securing the fixing rods 5. The core 8 pierces the soft tissue to the bone and drills the outer, and then the inner cortical plates. Depending on the required stiffness of the osteosynthesis, at least two rods 8 are inserted above and below the fracture. The threaded collet sleeves 7 are twisted, thereby creating a rigid fixation of the rods 8 in the device. Compression is required at the fracture site.

is achieved by rotating the compression screw 9 after loosening the nut 4. The use of collet sleeves 7 and fixing rods 8 in the device, which do not require pre-drilling of the holes in the bone with a drill, significantly reduces the duration of its overlap. If it is necessary to use a device with a change in the angle of insertion of the rods into the bone, for example, during osteosynthesis of the neck or condyles, the nut 12 is loosened.

(Fig. 2) move the swivel head 13 (Fig. 1) along the axis of the screw 1 1 by an amount of protrusion of the pin 14 and set it to the required angle by rotation. The axis-screw 11 is tightened with a nut 12 and the rigidity of the device is restored.

By using interchangeable assemblies for fastening the fixing rods 5 and 6 with the arrangement of the rods transverse to the axis of the device, fractures can be osteosynthesized at virtually any location.

Achieved at a low cost

working time of the surgeon is high rigidity of osteosynthesis, allowing early elevation of patients on crutches, simplicity and speed of application of the device, creating good access to wounds of open fractures during dressings and repeated surgeons

These interventions can significantly improve the results of treatment of fractures, especially in cases of polytrauma and in the conditions of care for mass admission of patients.

Claims (1)

Invention Formula A device for osteosynthesis, containing a stitch with fixing points fixing. Their rods, a compression screw with a nut, characterized in that, in order to shorten the fixation of fragments, one of the attachment points is made in the form of a swivel head with locking pins and a clamping nut, and fixing rods secured in fasteners with threaded collet sleeves. 12 5J7J  four Sriga sri.g LA (noeepnyjiioj fig.Z 5 years