JPH0247936Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an animal fixation device that facilitates injection operations when injecting into the tail vein of experimental animals.

Generally, in order to perform tail vein injection into experimental animals such as rats and mice, it is necessary to hold and immobilize the animal.

Conventional holding and fixing methods include, for example, placing a beaker over the animal on a table and letting the tail come out through the gap in the extraction opening of the beaker, or placing the animal's head through the open opening of a cylindrical body with one end open. Various fixation methods were used, including a method of pressing and fixing on the caudal side of the trapped animal. However, the conventional methods of fixation, which are simple, have the disadvantage that the animal tends to become violent and the injection is difficult to perform and requires skill.On the other hand, the method of fixing the animal firmly has the disadvantage that it takes time and effort to fix the animal. In addition, there were many other problems, such as the effects it had on the animals, such as making the animals excited and causing miscarriages in pregnant mothers, which interfered with valuable data.

Particularly in recent years, experiments using small animals such as rats and mice have become more frequent. Holding and fixing has come to influence the efficiency of experiments.

This invention has been devised in view of the above-mentioned drawbacks of the conventional art.

The present invention will be described below with reference to embodiments shown in the drawings.

In the figure, reference numeral 1 denotes a base of a concave storage cylinder provided with both side walls 2 and 2' in the longitudinal direction, and one side (rear side) of the base 1 is closed by a closing plate 3. The closing plate 3 is provided with a cutout groove 4 for drawing out the tail of the experimental animal to the outside. Next, reference numeral 5 denotes a lid serving as the upper lid of the base 1. This lid 5 is provided with a closing plate 6 at one (front) tip thereof perpendicularly below the lid. This occlusion plate 6 is provided so as to correspond to the occlusion plate 3,
The lid 5 and the closing plate 6 constitute an L-shaped lid. This closing plate 6 has a through hole 7 near the center.

Next, straddle the upper ends of the side walls 2, 2' of the base 1,
Lid fitting and holding parts 8, 8' are provided to hold the lid 5 in a state where it can move back and forth. The lid 5 is inserted between the holding parts 8 and 8' and can freely move back and forth.

A spring 9 connects the lid and the base so that it acts in the direction in which the lid 5 closes.

The animal fixation device of the present invention is composed of the above-mentioned parts, and when in use, a non-slip mat 10 is interposed between the product of the present invention and the experimental table to prevent the product from slipping. , pine 10 is placed on the outer periphery of the product of this invention.
It is desirable to paste the .

Next, when using the product of this invention, first
, and move the lid 5 forward (in the direction of arrow A) to open the opening C for storing the experimental animal. Next, the experimental animal is inserted from the head through the storage port C. Then, the tail of the experimental animal is pulled out from the cutout groove 4 of the closure plate 3, while the lid 5 is slightly moved backward (in the direction of arrow B) to close the storage opening C, and finally, the spring 9 that was removed earlier is removed. The lid 5 is fixed by hanging it.

Since the animal fixation device of the present invention can sufficiently fix the animal with such a simple procedure, the next tail vein injection can be performed easily and quickly.

In other words, the animal fixator of the present invention has a large storage opening for the experimental animal, so rather than being able to push the animal in, when the animal's head is inserted a little, the animal can crawl in from itself, which causes extremely little stress on the animal.

After storing the experimental animal, the storage opening is closed by pulling the lid, so it can be adjusted to the length of the animal, so even if the size of the animal varies, it can be fixed without any problems. Also, animals have a habit of protruding their noses through the through holes, so the animal's head is naturally fixed.

Experimental animals are held in place by sandwiching them between the front and rear closing plates, but since the lid is closed with a spring, they can expand and contract back and forth, giving the animals some degree of freedom, and they rarely move wildly. . Even if it goes wild, the animal will only be given the freedom to extend forward, and its tail will not move.
It does not interfere with tail vein injection.

Since the entire torso of a laboratory animal is not fixed, even pregnant animals can be safely housed in the fixator of the present invention.

As described above, the product of the present invention exhibits excellent effects, is easy to operate, can be manufactured at low cost, and is an extremely practical animal immobilizer.

[Brief explanation of drawings]

The drawings are explanatory diagrams showing one embodiment of the present invention,
FIG. 1 is a perspective view of the product of the present invention, FIG. 2 is a central vertical sectional view of FIG. 1, and FIG. 3 is a sectional view showing the product in use. DESCRIPTION OF SYMBOLS 1... Base, 2 and 2'... Side wall, 3... Closure plate, 4... Notch groove, 5... Lid, 6... Closure plate,
7... Through hole, 8 and 8'... Holding part, 9...
Spring, 10...Matsuto.

Claims (1)

[Scope of utility model registration request] A base of a concave storage cylinder, which has a closing plate on one side with a notched groove for pulling the tail out, and an L with a closing plate with a through hole near the center on the other side.
A lid fitting and holding part is provided at the upper end of the left and right side walls of the base to hold the L-shaped lid in a state where it can be moved back and forth, and the lid is inserted and fitted into the fitting and holding part. An animal immobilizer that is connected to a base by a spring so that the lid acts in the closing direction.