RU9379U1 - DEVICE FOR STABILIZATION OF SPINAL SPINAL PROCESSES - Google Patents

Abstract

A device for stabilization of the spinous processes of the spine, consisting of two metal strips located on both sides of the spinous processes and connected to each other by bolt connections with folding washers, characterized in that two parallel planes are made at the threaded ends of the bolts to a depth not less than the depth of the thread and the nuts on the inner surface are provided with two grooves that provide free movement of the nut relative to the bolt.

Description

DEVICE FOR STABILIZATION OF ACID SPINE PROCESSES OF THE SPINE.

The device relates to the field of medical technology, namely

to devices used in operations on the spine, with

the need to stabilize adjacent to each other

vertebrae.

Known devices for stabilizing the spine 1,2,31.

A device for attaching the spinous processes of the spine is known, containing metal strips with holes through which the bolts pass. In this case, the bolt heads are supported on the outer side of one flat, and nuts 41 are installed on the threaded part of the bolts from the outer surface of the other strip.

A disadvantage of the known device is that when installing the device on the spinous processes, it is necessary to screw a significant number of nuts and locknuts, which significantly lengthens the time of the operation, increases its injuries caused by the interaction of a locksmith tool when tightening the nuts and locks with the patient’s skin, muscles and blood vessels.

The objective of the claimed utility model is to reduce the injuries of the operation and reduce blood loss by reducing the time of setting the slats.

The task is achieved in that on the threaded ends of the bolts two planes are made to a depth not less than the depth of the thread, and the nuts on the inner surface are provided with two grooves providing freedom of movement, the movement of the nut relative to the bolt.

Figure 1 shows the attachment device of the spinous processes of the spine; figure 2 shows the connection of the bolt and nut; Fig. 3 shows a bolt; figure 4 nut; figure 5 folding washer.

The stabilization device of the spinous processes of the spine consists of two metal strips I and 2, connected to each other using several bolted joints.

μm A 61 V, 17/58

Each bolt connection consists of a bolt 3, a nut 4, and a bending washer 5. The inner surface of the bending washer 5 cuts the outer surface of the threaded part of the bolt 3, and the outer dimensions of the washer 5 are larger than the outer dimensions of GZESh 4.

The threaded part of the bolt 3 has two parallel planes on which there is no thread (Fig. 3), and grooves are groomed on the inner threaded surface of the nut 4, the depth of which is not less than the depth of the thread ((IG). As a result, the nut 4 can freely move along the surface of the threaded part of the bolt 3 in the case when the protrusions of the thread of the bolt 3 go through the grooves of the nut 4. The washer 5 has a hole, Ш1fin which is slightly larger than the distance between the parallel planes of the bolt 3, and the length is slightly larger than the outer diameter of the thread of the bolt 3.

An example implementation of the device.

When installing the device, both metal strips I and 2 are located on both sides of the spinous processes and are tightly pressed against them by a special device. In the spinous processes, holes are made opposite the holes in the laths I and 2.

These operations are identical to the operations that are performed when using the device adopted for the prototype, and are not considered in detail here.

Then through the holes in the bar I, the spinous process and the bar 2, a bolt 3 is passed, a folding washer 5 is put on the threaded end of the bolt 5, one of the edges of which is folded near the edge of the flat 2, (figure 2) then the nut 4 is put on, which thanks to the threadless planes on the bolt 3 and the grooves on the nut 4 loosely fits onto the bolt 3 and is brought into close contact with the washer 5 lying on the bar 2.

Then the nut 4 is rotated 90. Thus, the thread of the bolt 3 is connected to the thread of the nut 4 and the threaded connection of the bolt 3 and the nut 4 holds the strips I and 2 in position. To prevent the nut 4 from loosening, the edge of the folding washer is folded onto one of the faces of the nut 4.

This embodiment of the device can significantly reduce the time of attachment of the spinous processes from 50-60 minutes to 15 to 20 minutes, reduce the invasiveness of the operation and the loss of blood of the patient.

Literature.

I. Device for unloading the spine. Podvipsh G.A.,

Bobrov O.M., Yakovlev V.M. Dnepropetrovsk Medical Institute.

The invention N I73I2I2 from 07.17.89,

2. A device for stabilizing the spine. Elizarov V.G.,

Gerasimov O.R., Buslov I.V. The invention N I77I7I7 from 10.30.89.

3. A device for correction of spinal deformity. P.Ya. Fishchenko,

V.Ya. Fishchenko, N.P. Pilipenko, N.I. Goncharov, I.P. Fshtsenko. Moscow

Regional Clinical Research Institute

named after M.F. Vladimirsky. The invention N I77I7I8 from 07.19.90

4. The spine retainer. Peleganchuk V.A., Deev I.T., Kolomiets A.A.

Altai State Medical University. Application for delivery

Patent N 96II5704 of August 21, 1996.

Claims (1)

A device for stabilization of the spinous processes of the spine, consisting of two metal strips located on both sides of the spinous processes and connected to each other by bolt connections with folding washers, characterized in that two parallel planes are made at the threaded ends of the bolts to a depth not less than the depth of the thread and the nuts on the inner surface are provided with two grooves providing free movement of the nut relative to the bolt.