RU20230U1 - BONE TISSUE BIOPSY DEVICE - Google Patents

Abstract

1. A device for a biopsy of bone tissue, comprising a cylindrical body with an annular cutter at the end of its working end and a sleeve installed in the body, characterized in that it is equipped with a bone tissue cutter, and the sleeve is mounted for rotation and provided with wedge-shaped protrusions on the inner surface of the working end, in contact with movably fixed cutter knives. 2. The device according to claim 1, characterized in that the cutter knives are sickle-shaped and have a variable thickness profile.

Description

BONE TISSUE BIOPSY DEVICE

The utility model relates to medicine, in particular to medical equipment, and is intended for sampling bone tissue.

A known device for bone tissue bionism (1), containing a cylindrical corne, a sample retainer, made in the form of a sleeve installed in the housing having clamping collets at the working end, and also an annular cutter at the end of the working end of the body. The collection of bone material using this device is carried out by clamping a drilled bone column and its subsequent mechanical separation from the maternal area of the bone. Naturally, this leads to partial deformation of the bone tissue sample, which negatively affects the possibilities of its subsequent microscopic study and, especially, the possibilities of conducting electron microscopic ultrastructural studies.

The task of developing the inventive utility model is to create a device for a biopsy of bone tissue, which provides a warning of mechanical damage to a sample of bone tissue.

This problem is solved by the fact that the device for a biopsy of bone tissue, containing a cylindrical body with an annular cutter at the end of its working end and a sleeve installed in the body, is equipped with a bone tissue cutter, and the sleeve is mounted for rotation and provided with wedge-shaped protrusions on the inner surface of the working end, in contact with movably fixed cutter knives. It is provided that the cutter knives are sickle-shaped and have a variable thickness profile.

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IPC A 61 in 17/34

The proposed device is illustrated by a description and diagrams. The diagrams show:

FigL - device for bone biopsy, General view.

Figure 2 - the working part of the device.

Fig.Z - knife cutter.

Figure 4 - the working part of the device, view aa.

The device for biopsy of bone tissue contains a cylindrical body 1, equipped with an annular milling cutter 6, made in the form of a shelf 12, at the working end and an internal threaded thread 14 for attachment, which provides communication with the drive of the removable shank 2, at the opposite end. A perforated sector groove 15 is made along the perimeter of the housing 1, and a groove 9 is provided on the extruded surface of the working end. In the housing 1, a sleeve 3 is mounted with a possibility of rotation, made with a cone-shaped narrowing and wedge-shaped protrusions 4 on the inner surface of the working end. At the same time, sleeve 3 is provided with a threaded hole 16 for a fixing handle 5 located in the groove 15 of the housing 1. On the shelf 12 of the housing 1, a cutter 7 is made in the form of knives 8 with a base 10, which are movably fixed to the shelf 12 of the housing 1 by means of pins 11 in position contact with the protrusions 4 of the sleeve 3. In this case, the knives 8 can be made with a variable profile and the working end 13 of the crescent shape.

The device is used as follows.

To prepare the device for operation, the sleeve 3 is installed in the sleeve 3 in a position in which the knives 8 of the cutter 7 are located between the wedge-shaped protrusions 4 of the working end of the sleeve 3. After that, the fixing handle 5 located in the groove 15 is screwed into the slot 15, stabilizing, thereby thus, the position of the sleeve 3 relative to the housing 1. Using a threaded thread 14 of the housing 1 install the shank 2.

PCS

By connecting the shank 2 with the electric drive, the housing 1 is inserted into the soft tissue incision and the cutter 6 is installed on the bone surface, after which the insert is inserted into its thickness to the required depth. Moreover, due to the presence of grooves 9 on the outer surface of the working end of the housing 1, bone chips are removed. Moving the locking handle 5 along the sector groove 15 of the housing 1, rotate the sleeve 3. As a result, the knives 8 of the cutter 7 in contact with the wedge-shaped protrusions 4 of the working end of the sleeve 3 protrude inwardly, cutting the bone fragment. The device is removed from the wound and, having disconnected the shank 2, unscrewing the fixing handle 5 from the hole 16 of the sleeve 3, the latter is removed by removing the desired bone tissue from it.

Using the proposed device allows for sparing sampling of a bone tissue sample without mechanical damage, which improves the possibility of electron microscopic study of the ultrastructure of bone substance.

Sources of information taken into account: 1.A.S. USSR No. 1592979, publ. 27L0.95., Bull. Number 30.

Claims (2)

1. A device for a biopsy of bone tissue, comprising a cylindrical body with an annular cutter at the end of its working end and a sleeve installed in the body, characterized in that it is equipped with a bone tissue cutter, and the sleeve is mounted for rotation and provided with wedge-shaped protrusions on the inner surface of the working end, in contact with movably fixed cutter knives. 2. The device according to claim 1, characterized in that the cutter knives are made in a crescent shape and have a variable thickness profile.