RU142551U1 - MARKER OF INTERDERVERTEBRAL DISCS WITH SCREW PENETRATION DEPTH REGULATOR - Google Patents

Abstract

Marker of intervertebral discs with a screw for regulating the depth of penetration, characterized in that the marker is made in the form of a round needle, while the depth of penetration of the needle into the intervertebral disc is fixed by a slider located on the screw thread of the distal part of the needle, which allows the marker to penetrate into the intervertebral disc to the required depth by focusing the slider on the front surface of the vertebral body.

Description

The utility model relates to the field of medicine and medical surgical equipment, in particular to devices designed to accurately determine a damaged intervertebral disc during a stabilizing operation - anterior interbody fusion.

In the surgical treatment of patients with injuries (fractures, dislocations and fractures-dislocations) or diseases (for example, osteochondrosis) of the spinal column, an operation of the anterior interbody fusion is used. The essence of the operation is that it removes the intervertebral disc damaged by trauma or chronic disease and replaces it with an implant from the bone or, for example, titanium nickelide. A prerequisite for the operation is an accurate x-ray determination of the intervertebral disk damaged or destroyed as a result of the disease directly on the operating table, which must be partially or completely removed [1-3], which is done visually under conditions of limited surgical access (for example, on the cervical spine ) is difficult to do.

In order not to make a mistake in choosing the interested intervertebral disc during interbody fusion surgery, doctors use standard injection needles to mark the intervertebral discs. To do this, the injection needle is inserted parallel to the end plates of the vertebral bodies to an arbitrary length into the alleged (interested) intervertebral disc. The danger of such a technique for introducing a marker into the intervertebral disc is the possibility of penetration of the needle into the spinal cord.

Known marker intervertebral discs [RU 115639, publ. 05/10/2012] made in the form of a round needle containing pegs that prevent its displacement. The opposite end of the needle has step-like protrusions that allow the marker to penetrate into the intervertebral disc to the required length, for which a stop and a pressure plate are placed on the marker.

The disadvantage of this marker, firstly, is the difficulty in its execution due to design features, and, secondly, the relatively weak stability in the intervertebral disc due to the thin pressure plate.

Also known marker [RU 115640, publ. 05/10/2012] made in the form of a round bayonet-like curved knitting needle.

The disadvantage of this marker is the impossibility of regulating the depth of its penetration into the intervertebral disc.

The technical result of the proposed utility model is an accurate determination of the damaged (interested) intervertebral disc during anterior interbody fusion surgery for injuries and diseases of the spinal column.

This is achieved by the fact that the marker is made in the form of a round needle 1, the distal end of which has a screw thread 2 under the slider 3, which allows the marker to penetrate into the intervertebral disc to the required depth, by stopping the slider 3 in the front surface of the vertebral body.

Figure 1 shows a general view of a utility model.

A utility model is used (for example, on the cervical spine) as follows. Before the operation, the radiograph is determined in a lateral projection, the length of the injected area of the marker needle into the intervertebral disc. Then, the front surface of the cervical vertebrae is exposed through a midline incision. The intervertebral discs into which the markers are injected are determined by visual and palpation methods with the position of the slider pre-set in accordance with the length of the sharp part of the marker needle to be penetrated into the intervertebral disc. The presence of a slider does not allow, due to its emphasis on the front surface of the vertebral body, deep penetration into the intervertebral disc. An x-ray is taken of the cervical spine in a lateral projection and, by the presence of a needle located in the interested disk, diagnostics are performed. Having identified a damaged (or diseased) intervertebral disc using a marker, the needle is removed, and the operation proceeds to its next stage.

As a result of the application of the proposed utility model on the operating table, an error has been eliminated in determining the damaged or diseased intervertebral disc.

Information sources:

1. Barysh A.E. New technology of anterior monosegmental interbody fusion of the cervical spine [Text] / A.E. Barysh // Orthopedist, traumatol. - 2008. - 3. - S. 28-36.

2. Anterior locking plate-related complications: prevention and treatment recommendations [Text] / X. Ning, Y. Wen, Y. Xiao-Jian et al. // International Orthopedics (SICOT). - 2008. - Vol. 32. - P. 649-655.

3. Cervical corpectomy: complications and outcomes [Text] / M. Boakye, C.G. Patil, C. Ho, S.P. Lad // Neurosurgery. - 2008 .-- vol. 63, 4 (Suppl 2). - P. 295-301.

Claims (1)

Marker of intervertebral discs with a screw for regulating the depth of penetration, characterized in that the marker is made in the form of a round needle, while the depth of penetration of the needle into the intervertebral disc is fixed by a slider located on the screw thread of the distal part of the needle, which allows the marker to penetrate into the intervertebral disc to the required depth by focusing the slider on the front surface of the vertebral body.

Images