RU181517U1 - IMPACTOR FOR INTRODUCING A DEVICE WITH AN INCREASING HEIGHT FOR REPLACEMENT OF THE INTERDEPINAL DISK IN THE LUMBAR SPINE - Google Patents

Abstract

The utility model relates to medicine, namely to traumatology, orthopedics and vertebrology. The impactor is made of stainless steel in the form of two tubes. The inner tube 260.5 mm long has an outer diameter of 8.0 mm and an inner diameter of 6.0 mm. In the middle of the tube there is an external thread. A nut with a diameter of 17.0 mm and a width of 10.0 mm is pressed into one end of the inner tube. On the other side, the inner tube has a longitudinal cut of 42.5 mm in length, then the tube expands to 10.0 mm over the last 20.0 mm and ends with two extensions to a diameter of 12 mm. At the expanded ends of the tube there are two flat hooks located at a distance of 7.0 mm from each other, the width of the hooks at the base is 6.0 mm, in the free part 4.0 mm, length 6.5 mm, thickness 1.5 mm. Outer tube 145.0 mm long and 10.0 mm inner diameter. In the middle of the outer tube there is an internal thread. At one end of the tube there is a pressed-in nut with a diameter of 14.0 mm and a length of 22.0 mm. The outer tube is inserted into the inner tube during assembly. To install the hooks in the device, it is necessary to rotate the outer tube clockwise, and after installation, rotate the outer tube counterclockwise. In this case, the hooks enter the device as an anchor. The final stabilization of the impactor and the device occurs when a screwdriver is installed in the slot of the screw of the device. The screwdriver is a steel cylinder 306.0 mm long and 6.0 mm in diameter with a square slot at one end with a diameter of 2.0 mm, a nut with an external diameter of 10.0 mm is pressed into the other end. When the nut with a screwdriver is rotated clockwise, the extension of the extension device occurs.

Description

The utility model relates to medicine, namely to traumatology, orthopedics and vertebrology. The utility model provides the introduction of a device with increasing height to replace the intervertebral disc in the lumbar spine.

In the field of medical technology there are many inventions intended for use in the introduction and removal of various implants. Thus, in the study of patent literature, a “Tool Kit for Implants” was revealed [RU 2598761 published on July 27, 2016] for using, when introducing and removing carbon nanostructured composite implants, it contains an impactor for placing a disc between the vertebrae, a impactor for implants of a rectangular shape when replacing defects in vertebral bodies and in metaphyseal sections of long bones, an impactor for cylindrical implants when filling cylindrical defects after sequestrectomy or after removal of bone cysts and tumor formations and forceps for laying implants in the prepared bed in deep wounds. The impactor for installing the disk between the vertebrae is made in the form of a cylinder, one of the ends of the specified cylinder is equipped with a slot for the implant, the piston is mounted with the possibility of longitudinal movement on the side of the second end, while the nozzle is fixed at its free end, the outer surface of the latter is grooved. The impactor for rectangular implants when replacing defects of the vertebral bodies and in the metaphysical sections of the long bones is made in the form of a stepped cylinder, one end of which is grooved, equipped with an annular groove, a rounded end, while the last stage of the second end of the specified cylinder is equipped with a thread, through which an implant plug is mounted on it.

In the study of patent literature revealed "Spinal implant, a tool for it and a method of distraction of the spinal implant" [RU 2574373 published 02.10.2016]. A spinal implant with an outer casing and with an inner casing held therein and axially displaceable, in which a first lever bore is provided on the outer casing and a second lever bore is provided on the inner casing. Both lever wells are made in the form of oblong holes, flush with respect to each other, the teeth in the walls are located along the longitudinal axis of the first and second lever wells, respectively. The teeth in the walls are located on opposite lateral sides in their respective link wells. Additionally, guide means are provided on the inner and outer shells that provide axial movement of the inner shell relative to the outer shell, but which prevent rotation of the inner shell relative to the outer shell. A tool for the aforementioned spinal implant with a rod-type pivot arm and a handle attached to it. The rotary lever consists of two parts, while the rotary lever includes an internal rotator and an external rotator. At the distal end of the internal rotator, internal teeth are made. External teeth are formed at the distal end of the external rotator, so that the internal rotator can be used independently of the external rotator. The method of distraction of the above spinal implant using the above tool. The tool is first inserted using a pivot arm into two lever wells on the inner casing and the outer casing of the spinal implant so that the pivot arm engages with its internal teeth and the teeth in the wall of the lever well of the outer casing. The external rotator engages its external teeth with the teeth in the wall of the lever well of the inner casing before the spinal implant is distracted by rotation of either the internal rotator or the external rotator, or both.

The disadvantages of the known inventions used for the introduction and removal of various implants are due to the fact that they cannot be used together with a lumbar sliding cage including an axial screw with a square slot 2.0 mm in diameter.

The prototype of the claimed utility model is the "screwdriver with a square" tool, widely used in practical traumatology, orthopedics and vertebrology.

The disadvantage of a “square screwdriver” is that it cannot be used to fix and deliver the lumbar sliding cage to the implantation site.

The objective of the claimed utility model is to fix, deliver to the intervertebral space and adjust the height of the implantable lumbar sliding cage.

The problem is achieved by using an impactor to introduce a sliding device to replace the intervertebral space. The impactor is a device made of stainless steel in the form of two cannulated tubes [Fig. one.]. The inner tube [FIG. 2.] 260.5 mm long has an outer diameter of 8.0 mm and an inner diameter of 6.0 mm. In the middle of the inner tube there is an external thread for the inner thread of the outer tube. At one end, the inner tube has an extruded nut on the outside with a diameter of 17.0 mm and a width of 10.0 mm [Fig. 1, pos. 1]. On the other side, the inner tube has a longitudinal cut of 42.5 mm in length [Fig. 2, pos. 2], then the tube over the past 20.0 mm expands to a diameter of 10.0 mm [Fig. 1, pos. 3; FIG. 2, pos. 3] and ends with two extensions up to a diameter of 12 mm [Fig. 1, pos. four; FIG. 2, pos. four]. At the expanded ends of the tube there are two longitudinal flat hooks arranged longitudinally [FIG. 1, pos. 5; FIG. 2, pos. 5], located at a distance of 7.0 mm from each other, the width of the hooks at the base is 6.0 mm, in the free part 4.0 mm, length 6.5 mm, thickness 1.5 mm

Outer tube [FIG. 3.] with a length of 145.0 mm and an inner diameter of 10.0 mm. In the middle of the outer tube there is an internal thread for the external thread of the inner tube. At one end of the tube there is a pressed-in nut with a diameter of 14.0 mm and a length of 22.0 mm.

During assembly, an inner tube with extension at the end is inserted into the outer tube. When clockwise rotating the outer tube, the latter approaches expansion, resulting in the hooks of the inner tube moving closer. Since the outer diameter of the holes in the sliding device is 8.0 mm, to install the hooks in the device, it is necessary to rotate the outer tube clockwise, and after installation, rotate the outer tube counterclockwise. In this case, the hooks enter the device as an anchor. The final stabilization of the impactor and the device occurs when a screwdriver is installed in the slot of the screw of the device. Screwdriver [Fig. 4.] is a steel cylinder with a length of 306.0 mm and a diameter of 6.0 mm with a square slot at one end [Fig. 1, pos. 6; FIG. 4, pos. 6] with a diameter of 2.0 mm, at the other end there is a pressed-in nut with an outer diameter of 10.0 mm [Fig. 1, pos. 7]. When the nut with a screwdriver is rotated clockwise, the extension of the sliding device expands and vice versa.

FIG. 5 - Impactor for introducing a sliding device replacing the intervertebral space with a fixed sliding device replacing the intervertebral space.

FIG. 6 - Implantation of an expanding intervertebral device from transforaminal access.

Compared with the prototype, the utility model “Impactor for introducing a device with increasing height for replacing the intervertebral disc in the lumbar spine” provides fixation, delivery to the intervertebral space and height adjustment of the implantable lumbar sliding cage. Brief Description of the Drawings:

FIG. 1. - the impactor in assembled form, where: pos 1 - the pressed-in nut, pos. 3 - expansion of the inner tube to a diameter of 10.0 mm, pos. 4 - extension of the inner tube to a diameter of 12 mm, pos. 5 - flat hooks, pos. 6-square slot at the end of the screwdriver, pos. 7 - nut on a screwdriver.

FIG. 2. - the inner tube of the impactor, where: pos. 2 - longitudinal cut of the inner tube.

FIG. 3. - the outer tube.

FIG. 4. - a screwdriver, where pos. 6-square slot at the end of the screwdriver.

FIG. 5 - impactor for introducing a sliding device replacing the intervertebral space with a fixed sliding device replacing the intervertebral space.

FIG. 6 - implantation of an expanding intervertebral device from transforaminal access.

Claims (1)

Impactor for insertion of an implantable lumbar sliding cage into the intervertebral space, containing the inner and outer tubes and a screwdriver, the inner tube has an external thread in the middle, a pressed-in nut with a diameter of 17.0 mm, a width of 10.0 mm, and on the other side - a longitudinal cut of 42.5 mm in length, then the tube over the last 20.0 mm extends to a diameter of 10.0 mm and ends with two extensions to a diameter of 12 mm, at the expanded ends of the tube there are two longitudinal flat hooks located longitudinally separated from each other at a distance of 7.0 mm, the inner tube having a length of 260.5 mm, the outer diameter of 8.0 mm, the inner diameter of 6.0 mm, the outer tube has an inner thread in the middle part for the external thread of the inner sleeve, and at one end of the tube there is a pressed-in nut with a diameter of 14.0 mm and a length of 22.0 mm, the outer tube has a length of 145.0 mm and an inner diameter of 10.0 mm, the screwdriver is a steel cylinder 306.0 mm long and 6.0 mm in diameter with a square slot at one end and a nut pressed in at the other end with an outer diameter of 10.0 mm the fabric has the ability to be placed in the inner tube, and the square slot is designed for the screw of the lumbar sliding cage, when the screwdriver nut is rotated clockwise, the sliding cage expands, to install the hooks in the sliding cage, rotate the outer tube clockwise, and after installation, rotate the outer handset counterclockwise.

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