RU141722U1 - REPOSITION-FIXING DEVICE FOR MINIMALLY INVASIVE TREATMENT OF COMPRESSION SPIN FRACTURES - Google Patents

Abstract

1. A reposition-fixing device for minimally invasive treatment of compression fractures of the spinal column, including two pairs of repair sleeves made in the form of hollow tubes extending distally into a tapered-pointed cylinder, hinges with stoppers located on the repair sleeves and interconnected by reposition rods with handles wherein, on the surface of the reposition rods, multidirectional external threads are made. 2. The device according to claim 1, characterized in that the hinge stops are made in the form of bolts.

Description

Technical field

The utility model relates to the field of medicine, namely to traumatology and orthopedics, and can be used for minimally invasive (puncture) treatment of compression fractures of the thoracic and lumbar spine using immersed transpedicular systems.

State of the art

A device is known that contains supports that are interconnected, on which latches, made in the form of screws, a U-shaped bar, and an additional support (RU 2066140, published on September 10, 1996) are installed in pairs.

Also known is a device for reposition and fixation of vertebral fractures, consisting of plates with holes, rods and racks (RU 2150248, published on 06/10/2000).

The disadvantages of the known devices are the large size, the complexity of the design, the inability to change the reposition angles, and the need to dismantle the transpedicular screws, requiring additional surgical intervention (multi-stage surgical treatment).

Utility Model Disclosure

The task to which the utility model is directed is to create a simplified design of a less traumatic device with the ability to change reposition angles with subsequent fixation, which does not require dismantling of transpedicular screws and additional surgical interventions.

The technical result achieved in solving the problem by using the claimed utility model is the ability to change reposition angles with smooth, dosed adjustment of maneuvers, preventing sharp fluctuations and displacements of the structures of the vertebral-motor segments with subsequent fixation of the reposition results.

The specified technical result is achieved by the fact that the reposition-fixing device for minimally invasive treatment of compression fractures of the spinal column includes two pairs of repair sleeves made in the form of hollow tubes passing distally into a tapered-pointed cylinder, hinges with stoppers located on the repair sleeves and interconnected by rods reposition with handles, while on the surface of the reposition rods are made multidirectional external threads, and the hinge stops are made in the form oltov.

Brief Description of the Drawings

The essence of the claimed utility model is illustrated by drawings, where:

figure 1 shows the positioning-fixing device for minimally invasive treatment of compression fractures of the spinal column, side view;

figure 2 shows a reposition-fixing device for minimally invasive treatment of compression fractures of the spinal column, a view from the side of the conically-pointed parts of the repair sleeve.

The best option for implementing a utility model

The reposition and fixing device for minimally invasive treatment of compression fractures of the spinal column includes two pairs of repair sleeves 1 made in the form of hollow tubes passing distally into a conically pointed cylinder 2, which forms a head for fixing to the left and right groups of transpedicular screws (not shown). The head of the replacement sleeve 1 has a small external diameter increasing in the dorsal direction, exceeding the diameter of the head of the trapedicular screw by a range from 1 mm to 4 mm, which does not affect the length of the skin incision (does not increase the length of the wound). The head of the replacement sleeve 1 is conically pointed, which contributes to a better retraction of soft tissues and prevents tissue compression when installing the device through a small access. Two hinges 3 are put on each reponenting sleeve 1. An internal thread is made in the hinge 3, which interacts with the thread of the corresponding reposition rod 4. Moreover, on each reposition rod 4, external multidirectional threads are made in a 1: 1 ratio. Due to the movable connection, a wide range of movements of the reponing sleeves 1 relative to the reposition rods 4 in the sagittal plane is achieved. The approaching and removal of the reponenting sleeves 1 is carried out by rotating the handles 5, made in the middle of the reposition rods 4. The reposition angles are changed by rotating one reposition rod or by rotating the reposition rods of the paired sleeves in different directions. To fix the achieved reduction, the hinges 3 are equipped with stoppers 6 in the form of bolts.

A reposition-fixing device for minimally invasive treatment of compression fractures of the spinal column is used as follows: on the pedicle fixed in adjacent uninjured vertebrae, the heads of the repair bushings are fixed, after which repositional maneuvers consisting of a sequence of distraction and reclination (compression) are performed. The distraction is carried out by rotation of the handles of the corresponding reposition rods by the distance of the reponing sleeves relative to each other, the reclamation (compression) is carried out by drawing the corresponding reponent sleeves closer to each other. After completion of the treposion maneuvers, the device is fixed with stoppers, the nuts of the transpedicular screws are fixed with a special tool through the hollow repair sleeves, then the device is dismantled.

The reposition-fixing device for minimally invasive treatment of compression fractures of the spinal column has a low invasiveness of use, it allows to maintain reposition without blocking the immersed transpedicular system, which makes it possible to perform EOC control and block only after registering a satisfactory reposition, which significantly saves the time spent on unlocking and reposition with an unsatisfactory reposition result. The inventive device allows the stages of reposition (distraction, reclination) separately and with different amplitudes of each repositional element, dosed and smoothly without sharp fluctuations and displacements of the structures of the vertebral-motor segments, avoiding trauma to nearby nerve structures.

Claims (2)

1. A reposition-fixing device for minimally invasive treatment of compression fractures of the spinal column, including two pairs of repair sleeves made in the form of hollow tubes extending distally into a tapered-pointed cylinder, hinges with stoppers located on the repair sleeves and interconnected by reposition rods with handles while on the surface of the reposition rods are made multidirectional external threads. 2. The device according to claim 1, characterized in that the hinge stops are made in the form of bolts.

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