JPH0352496Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a straw tube for storing livestock semen, fertilized eggs, etc.

"Conventional Technology" In recent years, in the field of livestock farming, fertilized egg transplantation technology for livestock has been developed and put to practical use, and is useful for improving breeds, increasing production efficiency, etc.

By the way, when such fertilized egg transplantation is performed, a straw tube is usually used to store and preserve the semen or fertilized eggs of livestock. As such a straw tube, one having a structure as shown in FIG. 2, for example, is known.

In FIG. 2, reference numeral 1 denotes a straw tube, and this straw tube 1 consists of a tube body 2 and a stopper 3 disposed within the tube body 2. The tube 2 is made of synthetic resin and has a cylindrical shape, and stores semen, fertilized eggs, etc., and is used for injection. The plug body 3 consists of cotton plugs 4, 4 made of cotton or the like and a powder 5 made of polyvinyl alcohol resin sandwiched between these cotton plugs 4, 4, and the inside of the pipe body 2 is inserted into the pipe body 2. It is movably inserted.

In order to store and preserve, for example, a fertilized egg using such a straw tube 1, a trace amount of cryoprotectant is added into the tube body 2 from the stopper body 3 side. , an air layer, and a small amount of storage solution are sucked in in this order, and the opening of the tube body 2 on the side opposite to the stopper body 3 is sealed, and the tube is frozen and preserved. In this case, the powder 5 in the plug 3 comes into contact with the storage solution through the cotton plug 4, gets wet, and sticks to keep the inside of the tube 2 airtight.

"Problems to be Solved by the Invention" However, the straw tube 1 described above has the following disadvantages.

Since cotton plugs 4, 4 and powder 5 are used for the plug body 3, fine fibers such as cotton and fine particles of polyvinyl alcohol resin may be inside the tube body 2 when the plug body 3 is loaded into the tube body 2. It adheres to and remains. Since these fibers and particles are extremely fine, they cannot be completely removed by washing, etc., and even if they can be removed sufficiently, when storing fertilized eggs, etc., the cotton plug 4
The fibers and the like are separated and transferred into the tube body 2. Since the fibers, etc. remain in the tube body 2, when the stored fertilized eggs, etc. are injected and transplanted into a recipient cow, etc., the fibers, etc., may be removed from the fertilized eggs themselves or the fertilized eggs. It may adversely affect implantation in the uterine wall, thereby preventing conception.

"Means for Solving the Problems" Therefore, in the straw tube of this invention, the stopper is made of an elastic material to solve the above problems.

Embodiment FIG. 1 is a diagram showing an embodiment of the straw tube of this invention, and the reference numeral 10 in the figure is the straw tube. The straw tube 10 shown in FIG. 1 differs from the straw tube 1 shown in FIG. 2 in the material of the stopper.

In the straw tube 10 shown in FIG. 1, the tube body 11 is a transparent cylindrical thin tube made of vinyl chloride resin or the like, and the inside of the tube is sterilized with ethylene gas or the like. The plug body 12 is made of an elastic body,
It has a substantially cylindrical shape with an outer diameter slightly larger than the inner diameter of the tubular body 11, and the diameter becomes slightly smaller toward the distal end surface 12a. Here, as the elastic body, synthetic rubber such as silicone rubber, natural rubber, or synthetic resin such as soft vinyl chloride is used. The plug body 12 is inserted into one end 11a of the tube body 11, and its small-diameter distal end surface 12a is disposed toward the center of the tube body 11. This makes it easy to move in the direction of the body.

To store and preserve sperm and fertilized eggs using such a straw tube 10, for example, insert the injection needle A shown by the two-dot chain line in FIG. A suitable amount of sperm, fertilized eggs, etc. are sucked into the tube body 11 by suction using a negative pressure source B such as a suction device through A, and then the injection needle A is removed and the opening on the side opposite to the stopper body 12 is melted. Seal with a sealing means such as a plastic wrapper, and then freeze and preserve. In this case, since the stopper 12 is made of an elastic material, the injection needle A can be easily penetrated into the stopper 12, and when the stopper 12 is pulled out, the hole formed by the injection needle A will elastically return to its periphery. Or it is closed due to elastic deformation.
In addition, since the plug body 12 is composed of a single unit, fibers, particles, etc. are not separated and the inside of the tube body 11 is not contaminated.

Furthermore, in order to inject a fertilized egg, etc. into the uterus of a recipient cow, etc. through the frozen straw tube 10 containing sperm or fertilized eggs, etc., the fertilized egg, etc. is first thawed and the plug of the tube body 11 is inserted. Cut the end opposite to 12. Thereafter, it is attached to a well-known syringe (not shown), and this syringe is inserted into the uterus, and the rear end surface 12b of the stopper 12 is pressed by the pushing rod of the syringe. Then, the plug 12 moves within the tube 11, thereby pushing out the fertilized egg, etc. inside the tube 11 and injecting it into the uterus.

In the case of such a straw tube 10, the stopper 1
2 is made of an elastic material such as silicone rubber,
Foreign substances such as fibers are not mixed into the tubular body 11, and therefore, when storing and storing sperm, fertilized eggs, etc., or injecting them, there are no factors that adversely affect the sperm or fertilized eggs themselves or their implantation into the uterine wall. be excluded. In addition, since the stopper is a single elastic body, the stopper can be automatically inserted into the tube by a machine. The assembly is easier than inserting the stopper by assembling it. Furthermore, when storing sperm etc. into the tube body 11, a syringe needle etc. can be inserted into the stopper body 12 and mechanical suction can be performed using the injection needle. This makes it possible to simplify the process, thereby reducing processing costs.

In the above embodiment, the shape of the plug 12 is approximately cylindrical, but the shape of the plug 12 may be any shape as long as it keeps the inside of the tube 11 airtight and is movable within the tube 11. For example, it may be spherical, hemispherical, bowl-shaped, or substantially cylindrical as shown in FIG. 1, with a recess provided on the rear end surface to facilitate penetration of the injection needle.

In addition, when storing sperm, fertilized eggs, etc. when using this straw tube 10, an injection needle or the like is inserted into the stopper 12 and the sperm, fertilized eggs, etc. are aspirated through the injection needle. Sperm, fertilized eggs, etc. may be injected using a syringe or the like from the opening of the tubular body 11 on the opposite side.

``Effects of the invention'' As explained above, the straw tube of this invention is
Since the plug body is made of an elastic material, foreign substances such as fibers are not mixed into the tube body, and therefore, when storing or injecting sperm, fertilized eggs, etc., these sperm or fertilized eggs themselves can be Factors that adversely affect implantation on the uterine wall are eliminated, and therefore the conception rate of livestock such as cows can be improved compared to when conventional straw tubes are used. In addition, since the stopper is a single elastic body,
The plug can be automatically inserted into the tube by a machine, making assembly easier than inserting the plug into a conventional straw tube, thus increasing productivity. It is possible to improve the

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the straw tube of this invention, and is a schematic diagram of the structure of the straw tube. FIG. It is a schematic configuration diagram. 10... Straw tube, 11... Tube body, 12...
Plug body.

Claims (1)

[Scope of Claim for Utility Model Registration] A straw tube for storing semen, fertilized eggs, etc., characterized by having an elastic stopper that is movable within the tube.