RU153298U1 - RING DRILL FOR TRAPANATION OF EGGSLAWS FOR EXTRACTION OF CHICKEN EMBRYO FROM EGGS FOR FURTHER RECEIPT OF CELLULAR TRANSPLANTS FROM ITS FETAL TISSUES - Google Patents

Abstract

An annular drill for trepanation of an egg shell for extraction of a chicken embryo from an egg for further obtaining cell transplants from its fetal tissues, comprising a body with a shank in the form of a hollow body of revolution with cutting teeth on the working end, which is made in the form of a crown with an internal cavity in the form of an expanding truncated cone for moving the core into the cavity of the shank, the hole diameter of which is equal to the largest diameter of the truncated cone, characterized in that at a distance of 3 mm from the cutting part of the crown a circular stop is fixedly fixed to the drill, consisting of two parts that are not connected to each other: rubber, located closer to the cutting part of the crown and metal, located further from the cutting part of the crown.

Description

The utility model relates to the field of medicine, biology and biomedical technologies, in particular to devices for trepanation of an egg shell to extract a chicken embryo from an egg to further obtain cell transplants from its fetal tissues.

The well-known "Method of extracting a chicken embryo from an egg to further obtain cell transplants from its fetal tissues" [1]. For its implementation, a chicken egg with an embryo of 7-10 days of development is taken, before removing the chicken embryo, sparing trepanation of the egg shell is carried out by drilling 6 perforating holes in the region of the blunt end of the egg, followed by alternately sawing from the inside of the egg shell spaces between the holes, followed by extraction of the obtained egg segment shell and embryo extraction. Due to the fact that the surface of an egg shell is fragile and its surface is convex, then ring drills are best suited for drilling holes in it. This type of drill in this case slips worse and splits it less often. But, even when drilling trepanation holes with a core drill, there are cases when it falls through the shell during drilling and damages the chicken embryo in the egg, making its fetal tissues unsuitable for further production of cell transplants from them. In connection with the above, the development of a core drill for trepanation of an egg shell to extract a chicken embryo from an egg to further receive cell transplants from its fetal tissues, the design of which does not allow the shell to fall through the shell during the drilling process and damage the chicken embryo in the egg, is certainly relevant.

A known analog [2] is a core drill consisting of a shank and a working part consisting of a cylindrical base made with windows, in which partitions are placed in the form of diamond-containing matrices connecting the inner and outer diamond-containing matrices.

The disadvantage of the above analogue is that it is very expensive and does not have a limiter, which allows it to fall under the shell during drilling.

A known analog [3] is a core drill consisting of a body and a corrugated base, the wall thickness of which is less than the thickness of diamond-containing matrices, inner, outer and cutting diamond-containing matrices.

The disadvantage of the above analogue is that it is very expensive, breaks the shell during drilling, due to the corrugated base and does not have a limiter, which allows it to fall under the shell during drilling.

As a prototype, we selected [4] a core drill containing a body with a shank in the form of a hollow body of revolution with cutting teeth on the working end, which is made in the form of a crown with an internal cavity in the form of an expanding truncated cone to move the core into the cavity of the shank, the hole diameter of which equal to the largest diameter of the truncated cone, while the construction of the angles of the cutting teeth is made so that when applying to the machined plane at an angle, the crown with the cutting teeth cuts into the machined surface without kolzheniya.

The disadvantage of the above prototype is that it does not have a limiter, which allows it to fall under the shell during drilling.

The objective of the technical solution is to prevent injury to the chicken embryo in the egg, due to the failure of the drill under the shell, during drilling of trepanation holes, when it is removed.

The problem is solved due to the fact that in the “Ring drill for trepanation of an egg shell to extract a chicken embryo from an egg to further obtain cell transplants from its fetal tissues” containing a body with a shank in the form of a hollow body of revolution with cutting teeth on the working end, which is made in in the form of a crown with an internal cavity in the form of an expanding truncated cone for moving the core into the cavity of the shank, the hole diameter of which is equal to the largest diameter of the truncated cone, are provided the following differences: at a distance of 3 mm from the cutting part of the crown there is a circular stop fixedly attached to the drill, consisting of two parts that are not connected to each other: rubber, located closer to the cutting part of the crown and metal, located further from the cutting part of the crown.

There is a causal relationship between the set of essential features of the claimed object and the achieved technical result, namely, at the moment of drilling through the eggshell, the limiter prevents the drill from falling under it and the chicken embryo is injured in the egg, the metal part of the limiter prevents the drill from falling into the egg, and the rubber part limiter eliminates the impact on the shell of the metal part of the limiter during drilling, preventing its split.

The technical solution allows to prevent injury to the chicken embryo in the egg, due to the failure of the drill under the shell, during drilling of trepanation holes, when it is removed.

The technical nature of the proposed technical solution is illustrated in the drawing, on which:

FIG. 1. Side view of the “Ring drill for trepanation of the eggshell to extract the chicken embryo from the egg to further obtain cell transplants from its fetal tissues”.

The proposed “Ring drill for trepanation of an egg shell to extract a chicken embryo from an egg to further obtain cell transplants from its fetal tissues” consists of: a working end (1); shank (2); internal channel of the drill (3); rubber part of the limiter (4); metal part of the limiter (5).

The technical solution described above “A core drill for trepanation of an egg shell to extract a chicken embryo from an egg to further obtain cell transplants from its fetal tissues” works as follows: a core drill with a hollow shank 2 is inserted into a drill chuck or a special cartridge for surgical drills and fixed. After that, the cutting tool is rotated and fed to the surface of the egg shell. After drilling through the egg shell, the limiter prevents the drill from falling under it and the injury of the chicken embryo in the egg.

Feasibility study:

Technical and economic efficiency when applying the technical solution we are offering is due to an almost 2-fold increase in the percentage of extraction of intact chicken embryos from an egg, which will certainly significantly reduce the cost of the resulting cell transplant and increase its number.

Information sources

1. Patent for invention No. 2538701 Russian Federation, IPC A61K 35/48. A method of extracting a chicken embryo from an egg to further obtain cell transplants from its fetal tissues / V.A. Malchevsky, S.A. Petrov. No. 20133132327/15; declared 07/11/2013; publ. 01/10/2015.

2. Patent for utility model No. 38660 Russian Federation, IPC В23В 51/04. Ring drill / M.V. Kuzmin, V.P. Kuzmin V.N. No. 2004101478/20; declared 01/22/2004; publ. 07/10/2004.

3. Utility Model Patent No. 47272 Russian Federation, IPC V23B 51/04. Ring drill / M.V. Kuzmin, V.P. Kuzmin V.N. No. 2005109455/14; declared 04/04/2005; publ. 08/27/2005.

4. Patent for invention No. 2198610 Russian Federation, IPC АВВ 17/16. Ring drill / I.B. Beklemishev, M.I. Sychev V.A. No. 2000119271/14; declared 07/19/2000; publ. 02/23/2003.

Claims (1)

An annular drill for trepanation of an egg shell for extracting a chicken embryo from an egg for further obtaining cell transplants from its fetal tissues, comprising a body with a shank in the form of a hollow body of revolution with cutting teeth on the working end, which is made in the form of a crown with an internal cavity in the form of an expanding truncated cone for moving the core into the cavity of the shank, the hole diameter of which is equal to the largest diameter of the truncated cone, characterized in that at a distance of 3 mm from the cutting part of the crown a circular stop is fixedly fixed to the drill, consisting of two parts that are not connected to each other: rubber, located closer to the cutting part of the crown and metal, located further from the cutting part of the crown.

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