RU105157U1 - Intervertebral implant and device for its introduction - Google Patents

Abstract

 1. The intervertebral implant is made in the form of a U-shaped body, on the outside of the body there are notches for stabilization in the interbody gap, characterized in that a threaded screw with a nut is installed inside the U-shaped body, the screw head located at the end of the U-shaped body, made in the form of a nut. ! 2. A device for introducing an intervertebral implant, made in the form of a tube, designed in the form of a handle at one end and having a device for temporarily fixing the implant at the other end, characterized in that a rod with a spring is located inside the tube, and from one side of the tube, from the end , a moving handle is located, and on the other hand there are two clamping jaws for holding the implant, a hexagon is located between the jaws in the center on the rod.

Description

A useful model - an intervertebral implant and a device for its introduction - relates to the field of medical technology and is intended for insertion of an intervertebral implant, used when performing surgical operations on the spine, requiring separation of the bodies and their stabilization.

A known intervertebral implant made in the form of a head, a central part and a base, the central part having a lot of jumpers extending from the head to the base with the formation of large areas between the head, jumpers and the base of the through windows, and the external thread on the head is made on its conical part (Patent No. 2373901, IPC A61F 2/44, Intervertebral implant, as well as the surgical method of spinal fusion of the lumbar spine / KOPF Franz Jur. (DE), Publ. 27.11.2009).

However, the proposed implant requires a set of special tools for forming a bed under the implant, threading and stretching the vertebrae.

Known implant of the intervertebral disc of the lumbar spine, made in the form of a half body with coaxial holes on the front and rear surfaces and fixation elements in the form of combs of transverse triangular teeth (Patent No. 2186548, IPC ⁷ A61F 22/44, A 61 FR 2/46, Implant of the intervertebral disc of the lumbar region / Chertkov A.K., publ. 10.08.2002).

However, the installation of this implant is difficult due to the lack of special tools and the need for significant stretching of the vertebral bodies during its installation.

Known implant guide made in the form of an elongated curly console, designed in the form of a handle at one end and having a device for temporary fixation of the implant at the other end (Application No. 92015441/14, IPC 6 А61С 8/00, Implantovod / Alferov P.P., Antonenko S.V., Ivanov G.M., Saprykin V.V., JSC METTEM, Declaration of 12/30/1992, Publish. 02/10/1997).

However, this device does not provide rigid fixation of the implant in the implant guide, which complicates its installation and threatens intraoperative complications.

The objective of the utility model is the development of an expanding interbody implant of the thoracic and lumbar spine with an extension of the interbody gap at the operated level and a device for its introduction, providing convenient capture of the implant and its entry into the spine.

This problem is solved by the fact that the intervertebral implant is made in the form of a U-shaped body, on the outside of the body there are notches for stabilization in the interbody gap, and inside the U-shaped body there is a threaded screw with a moving nut to move the implant, a screw head located at the end U-shaped body, made in the form of a nut under the device for the introduction of an intervertebral implant. A device for introducing an intervertebral implant, made in the form of a tube, inside which there is a rod with a spring, and from one end of the tube, designed in the form of a handle, a moving handle is located at the end, and on the other hand there are two clamping jaws for holding the intervertebral implant, between with sponges in the center on the stem is a hexagon into which the implant head is inserted.

A utility model - an intervertebral implant and a device for its introduction - is explained by the description, diagrams and photograph, which depict:

Figure 1 - diagram of the intervertebral implant, a General view;

Figure 2 - diagram of the intervertebral implant disassembled;

Figure 3 - diagram of a device for introducing an implant;

Figure 4 - photo of the intervertebral implant and a device for its introduction, General view.

The intervertebral implant (Figure 1) is made in the form of a U-shaped body 1, on the outside of the body there are notches 2 for stabilization in the interbody gap, a threaded screw 3 (Figure 2) with a nut 4, a screw head 5 is installed inside the U-shaped body located at the end of the U-shaped body, made in the form of a nut 6 under the device for introducing an intervertebral implant.

A device for introducing an intervertebral implant (Fig. 3) is made in the form of a tube 7, inside of which there is a rod 8 with a spring 9, and from one end of the tube, designed in the form of a handle 10, there is a moving handle 11, and on the other hand - two clamping jaws 12 for holding the intervertebral implant, between the clamping jaws 12 in the center of the rod 8 is a hexagon 13 into which the implant head 5, 6 is inserted.

The intervertebral implant and device for its introduction is used as follows.

In the operating room, equipped with an electron-optical converter, after processing the surgical field, a linear skin incision is made along the line of the spinous processes, the vertebral arches are skeletonized. The vertebral arches and articular processes are exposed outward in the direction of the transverse processes. The spinal canal is opened by an expanded interlaminectomy and removal of part of the articular processes to visualize the root exit site. The instrument retracts the dural sac in the medial direction and exposes the back of the disc. Using a thin blade scalpel, a circular incision of the fibrous ring with a diameter of about 1 cm is performed. Through this hole, the surgeon introduces curettes and forceps sequentially to remove the intervertebral disc material, gradually increasing their diameter. The substance of the disk is completely removed, and the surfaces of the locking plates are scraped out. Next, with one hand they take the device for introducing the intervertebral implant, with the other hand they pull the handle onto themselves, the jaws 12 open and the intervertebral implant is inserted into the hexagon 13, from the side of the cap 5, made in the form of a nut 6 (Figure 4). The position of the implant corresponds to the position of the handle 11 of the device for insertion. The implant is gradually inserted into the prepared intervertebral space. Notches 2 of the implant must be in contact with the locking plates. After the formation of the bed and installation of the implant, it is moved apart by turning the handle 11 clockwise. During the rotation of the handle 11 of the device, the wings of the U-shaped body 1 of the implant are extended by sliding the nut 4 on the threaded screw 3. Having reached the required size of the interbody gap, the handle 11 of the device is squeezed away, the clamping jaws 12 of the device open and the implant remains in the prepared bed.

The operated spine is stabilized by one of the known methods for up to 2-3 weeks.

The use of the proposed intervertebral implant and a device for its introduction to perform spinal fusion of the thoracic and lumbar spine in the clinic of FGU “RSC“ WTO ”named after Acad. GA Ilizarova »Ministry of Health and Social Development of Russia showed that its use allows you to restore relationships in the operated segment and prevents the development of neurological complications, patients are rehabilitated in a shorter time. The proposed device for introducing an intervertebral implant contributes to a more convenient and safe installation of the implant, minimizing the risk of damage to the spinal cord, spinal roots and blood vessels during installation.

Claims (2)

1. The intervertebral implant is made in the form of a U-shaped body, on the outside of the body there are notches for stabilization in the interbody gap, characterized in that a threaded screw with a nut is installed inside the U-shaped body, the screw head located at the end of the U-shaped body, made in the form of a nut. 2. A device for introducing an intervertebral implant, made in the form of a tube, designed in the form of a handle at one end and having a device for temporarily fixing the implant at the other end, characterized in that a rod with a spring is located inside the tube, and from one groan of the tube, from the end , a moving handle is located, and on the other hand, two clamping jaws for holding the implant, a hexagon is located between the jaws in the center on the rod.