EA-053305-B1 - DEVICE FOR INSTALLING A TRABECULAR CAGE IN INTERBODY FUSION

EA053305B1EA 053305 B1EA053305 B1EA 053305B1EA-053305-B1

Abstract

The invention relates to neurosurgery, traumatology, and orthopedics and can be used for degenerative-dystrophic and purulent-inflammatory diseases. The technical result of using the proposed invention consists of expanding the functional capabilities and improving the technical characteristics of the device. The handle of the retractable inner tube is located within a diametrically enlarged step of a cylindrical cavity formed in the outer tube. The step contains two opposing through-holes for access to the inner tube handle. The retaining device is designed as a prefabricated handle, externally inclined relative to the longitudinal axis of the outer tube, and extending in steps of varying diameters.

Inventors

Азаматов Багдат Нурланович
Саденова Маржан Ануарбековна
Бекарисов Олжас Сапаргалиевич
Байдарбеков Мурат Умирханович
Руденко Сергей Олегович
Мухаметбек Жаксылык Мухаметбекулы
Ипмагамбетов Джангир Нариманович
Аргын Едил
Абдикаликов Маргулан Серикбаевич

Assignees

НЕКОММЕРЧЕСКОЕ АКЦИОНЕРНОЕ ОБЩЕСТВО "ВОСТОЧНО-КАЗАХСТАНСКИЙ ТЕХНИЧЕСКИЙ УНИВЕРСИТЕТ ИМ. Д. СЕРИКБАЕВА"
КОНУРБАЕВА ЖАДЫРА ТУСУПКАНОВНА

Dates

Publication Date: 20260504
Application Date: 20250625

Claims (1)

A device for installing an interbody cage for performing lumbar spine fusion, comprising coaxially oriented outer and inner cylindrical tubes with the ability to be controlled to extend using the handle of the inner tube, the threaded end of the inner tube is configured to enter the threaded hole of the interbody cage, wherein end stops orienting this tube with respect to the cage are made on the end of the outer cylindrical tube, and the device itself is equipped with a retaining device, characterized in that the handle of the retractable inner tube is located inside a diametrically enlarged step of a cylindrical cavity made in the outer tube with two opposite through windows for access to the handle of the inner tube, the retaining device is made in the form of an externally inclined, step-by-step increasing handle of different diameters oriented with respect to the longitudinal axis of the outer tube, the connection of the handle with the outer cylindrical tube is carried out through a disk clamp based on it, movable along the axis with a non-fully spherical convex base additionally attached to it, designed with the possibility of interaction with a non-fully spherical cavity of identical size and shape in the cantilever end of the handle rod, wherein the non-fully rotating spherical hinge formed by the non-fully spherical base and cavity is designed with the possibility of adjusting the rotation of the spatial-angular position of the handle in relation to the longitudinal axis of the outer cylindrical tube and subsequent fixation of the achieved intermediate spatial-angular position of the assembled handle.

Description

The invention relates to neurosurgery, traumatology and orthopedics and can be used to provide replacement of intervertebral space in degenerative-dystrophic and purulent-inflammatory diseases. Surgical treatment of degenerative-dystrophic diseases of the thoracic and lumbar spine during interbody space replacement is performed using trabecular cages for interbody fusion (e.g., RK Patent for Utility Model No. 9325, IPC A61F 2/44, published in BI No. 27, 2024, PRC Patent CN 209122543 U, IPC A61F 2/44, published on July 19, 2019). Improved surgical treatment results are achieved due to the cellular structure of the trabecular cage, its serrated walls and the specific location of the central threaded hole. This achieves the required integration of the cage with bone tissue. The surgical treatment effect was achieved due to the bioinertness of the cage material, low coefficient of thermal expansion and improved osteoinductive properties. To install the interbody cage from the anterior approach to perform lumbar fusion, special devices are required, such as pushers (USSR Patent No. 1424826, IPC A61B 17/60, published in BI No. 35, 1988), conductor-injectors (RU Patent No. 2792942, IPC A61F 2/44, published in BI No. 10, 2023, Fig. 2, of the Russian Federation Patent Truss reinforcing cage for forming a combined implant for replacing a removed disc during surgery on the thoracic and lumbar spine and a conductor-injector for installing and filling a truss reinforcing cage), guide instruments (RU Patent for utility model No. 176259, IPC A61F 2/44, published in BI No. 2, 2018, Implant for anterior lumbar spine spondylodesis, Fig. 3), impactors for introducing the device (RU Patent for utility model No. 181517, IPC A61F 2/46, published in BI No. 20, 2018, Impactor for introducing a device with an increasing height for replacing an intervertebral disc in the lumbar spine, Figs. 2, 3), an insertion tool (US Patent US 9579213, IPC A61F 2/44, 2/46, published 02/28/2017, Figs. 4, 5, Intervertebral expandable cage system and its tool/ and others. The disadvantage of known devices for interbody cage installation is limited functionality and low technical characteristics. The closest in technical essence to the proposed device is a device for installing an interbody cage from an anterior approach for the purpose of performing lumbar spine fusion, according to Russian Federation patent for utility model No. 193969, IPC A61F 2/46, 2/44, published in BI No. 33, 2019. This technical solution is accepted as a prototype for the proposed one. A known device for installing an interbody cage from an anterior approach for performing lumbar spondylodesis comprises coaxially oriented outer and inner cylindrical tubes with the ability to be controlled by a handle of the inner tube, the threaded end of the inner tube is designed to be inserted into a threaded hole of the interbody cage, while end stops are provided at the end of the outer cylindrical tube to orient this tube with respect to the cage, and the device itself is equipped with a device for holding it. The disadvantages of the known device include limited functionality and limited technical characteristics, including inconvenience for use by the doctor during surgery, and the complexity and high trauma of inserting the cage into the interbody space. The technical result of using the proposed invention consists in expanding the functional capabilities and improving the technical characteristics of the device. The said technical result is achieved due to the fact that in the device for installing an interbody cage from the anterior approach for performing fusion in the lumbar spine, containing coaxially oriented outer and inner cylindrical tubes with the possibility of controlled extension using the handle of the inner tube, the threaded end of the inner tube is made with the possibility of entering the threaded hole of the interbody cage, wherein at the end of the outer cylindrical tube there are end stops orienting this tube with respect to the cage, and the device itself is equipped with a device for holding it, in accordance with the proposed invention, the handle of the retractable inner tube is placed inside a diametrically enlarged step of a cylindrical cavity made in the outer tube with two opposite through windows for access to the handle of the inner tube, the holding device device is made in the form of an externally inclined, step-by-step increasing prefabricated handle oriented with respect to the longitudinal axis of the outer tube, the connection of the handle with the outer cylindrical the tube is carried out through a disk clamp based on it, movable along the axis, with a non-fully spherical convex base additionally attached to it, made with the possibility of interaction with a non-fully spherical cavity of identical size and shape in the cantilever end of the handle rod, wherein the non-fully rotating spherical hinge formed by the non-fully spherical base and cav