RU11995U1 - DEVICE FOR DYNAMIC STABILIZATION OF THE SPINE - Google Patents

Abstract

A device for dynamic stabilization of the spine, including an alloy spring with thermomechanical shape memory, hook-shaped grips, characterized in that the spring turns are omega-shaped, arranged alternately in the sagittal and frontal surfaces, oriented parallel to the spinous and transverse processes, and the hook-shaped grips are located in the frontal plane and has anatomical correspondence to the paravertebral space in the implant placement zone.

Description

Device for dynamic stabilization of the arm.

The utility model relates to medicine, namely to traumatology, orthopedics, neurovertebrology and can be used to stabilize the posterior structures in the surgical treatment of patients with injuries, the consequences of injuries and diseases of the spine, and can also be used in veterinarians.

A device for fshssatsii the spine, containing a cylindrical spring with grips located in mutually perpendicular planes (RF Patent No. 1136803, MKI A61B17 / 56, 1985, bull. No. 4).

The disadvantages of the known device is:

1. The mismatch of the cylindrical shape of the implant (coil spring) with the anatomical shape of the paravertebral space, which prevents the normal location of the extensor muscle of the spine, is accompanied by its detachment, deformation of soft tissues and pain in the area of surgical intervention, leads to impaired function, lengthens the duration of rehabilitation treatment.

2. The cylindrical shape of the spring does not exclude rotational mixing; 1 the vertebrae and does not allow to achieve stability of the damaged (affected) segment of the spine.

The objective of the utility model is to reduce the invasiveness of the operation (taking into account the anatomical feasibility of the device), increase the reliability and prolong the achieved effect of reclamation, unloading and stability of the body of the damaged (affected) vertebra, decrease the rehabilitation period, decrease the level

4A61B 17/56

disability, increasing the comfort of the post-radiation period, reducing the cost of inpatient treatment and rehabilitation.

This task is achieved by the fact that the spring coils are made omegoobrazno, are arranged alternately in the sagittal and frontal planes, oriented parallel to the spinous and transverse processes, and the grips in the form of hooks are located in the frontal plane.

In FIG. 1 shows a device for dynamic stabilization of the spine in its original position in three projections; in FIG. 2 - the same, after deformation in a cooled state; in FIG. 3 is the same, view in working position, before compression, in FIG. 4 - the same, view in the working position, after compression.

A device for dynamic stabilization of the spine contains a spring with omego-shaped coils 1, which has hooks at the ends in the form of hooks 2.

The manufacture of a device for the dynamic stabilization of the spine from a material with a thermomechanical shape memory, for example, titanium nickelide, ensures the restoration of the initially given shape of the device in working position after preliminary deformation at a temperature below 10 ° C., And the use of a large diameter wire increases the compression force.

The device is used as follows.

During the operation, the spinous processes above and below the lying vertebra are exposed on one side. The fascia is dissected and the spinal extensor muscle is retracted outwardly. In the spinous process of the overlying vertebra, closer to the upper 1fay, drill a hole or form a groove 3. (Fig. 3.4). Then a device for dynamic stabilization of the spine (Fig. 1), the length of which is 2-3 cm less than the distance between the spinous processes of the overlying and underlying

vertebrae, irrigated with chloroethyl for 5-10 seconds, cooling it to a temperature below 10 ° C. With the help of pommel forceps, omega-shaped coils 1 (Fig. 1) are stretched to the desired length, and the grips 2 (Fig. 1.) are unbent. Then the device is transferred to the surgical wound, one rectified grasp is inserted into the hole or into the groove of the overlying vertebra 3, and the second is introduced under the spinous process of the underlying vertebra (Fig. 3.4). After 20-30 seconds, in connection with the reverse phase transition that occurs when contact heating to 37 ° C, the device tends to take a predetermined (i.e. initial) form. The omega-shaped coils are reduced, the hooks tightly enclose the spinous processes and contraction of the overlying and underlying vertebrae occurs. The device is implanted in a gutter formed by the spinous processes and arches of the vertebrae with transverse processes. The omega-shaped coils are oriented parallel to the spinous and transverse processes, which eliminates rotational displacement. The extensor spine is laid in its place. Thus, they create dynamic stabilization of the spine, and the forces constantly striving to tighten the device provide prolongation of the achieved reclination of the body of the middle (damaged, affected) vertebra (Fig. 4). The wound is sutured in layers. The proposed device is compared with the known one, which is adopted as a prototype, due to the omega-shaped coils located in the sagittal and frontal planes, it has an anatomical correspondence to the paravertebral space in the implant placement zone. The device develops a greater pulling force due to the possibility of using a large diameter wire, which leads to more reliable reclamation of the damaged vertebra and stabilization of the spine. The omega-shaped coils located in mutually perpendicular planes prevent the rotational displacement of the vertebrae.

The advantages of the claimed construction will reduce the trauma of the operation, reduce the cost of expensive inpatient treatment and rehabilitation, and reduce the time for restoration of working capacity. By reducing the level of disability, the use of the construction will also give a significant economic effect. The absence of external immobilization (corset) in the postoperative period creates comfort for the patient and increases the effectiveness of rehabilitation measures.

The description was made by A.Komkov

Claims (1)

A device for dynamic stabilization of the spine, comprising an alloy spring with a thermomechanical shape memory, hook grips, characterized in that the coil of the spring is omega-shaped, arranged alternately in the sagittal and frontal surfaces, oriented parallel to the spinous and transverse processes, and hooks in the form of hooks are located in the frontal plane and has an anatomical correspondence to the paravertebral space in the implant placement zone.