RU103725U1 - ANIMAL HEAD LOCK - Google Patents

Abstract

 An animal head retainer, consisting of a retainer directly with an opening for the surgical field and attachment elements, characterized in that it is made of skin with a thickness of at least 3 mm, is additionally equipped with an opening for fixing the upper jaw of the animal and clamping parts, the device being dimensioned: the outer diameter of the retainer is not more than 55 mm, the vertical diameter of the hole for the surgical field is not more than 25 mm, the horizontal diameter of the hole for the surgical field is not more than 45 mm, the vertical diameter of the hole for fixing the upper jaw no more than 15 mm, horizontal diameter of the hole for fixing the upper jaw no more than 40 mm.

Description

The utility model relates to experimental medicine, namely to devices for limiting the mobility of small laboratory animals, for example rats.

Known head holder of stereotaxis, consisting of a nasal clip, a rod handle for adjusting the inclination of the tooth holder, tooth holder, ear holders, screw for moving the ear holders, head holder, drug maker. [http://w3.ivanovo.ac.ru/physiology/files/files/metod/metod_eksperem_fiziol_2005.htm].

The disadvantage is the bulkiness of the device, the technical complexity in its application, the need for factory assembly of components and assemblies.

Also known are devices for fixing the head of laboratory animals such as cats, dogs, which are a combination of synthetic material and, as a rule, a wooden base for fixing the animal.

The disadvantage is the inability to use them for experiments on small laboratory animals due to their bulkiness and disproportionate dimensions.

The closest in its features is the head clamp of a laboratory dog, which is directly a clamp made of synthetic material with an opening for the surgical field and fastening elements, a retainer for the muzzle in the form of a lasso and a wooden base. [Guide to lessons on practical morphology / Ed. N.D. Golovina. - M .: GEOTAR-MED, 1996.-115 p.]

A known object cannot be used to fix the head of small laboratory animals due to disproportionate dimensions and inconvenience in use.

The objective of the utility model is to create a device for adequate fixation of the head of a small laboratory animal for further laboratory experiments by surgical intervention.

The problem is solved using the proposed animal head retainer, consisting of a directly retainer with an opening for the surgical field and fastening elements, moreover, it is made of leather with a thickness of at least 3 mm and is additionally equipped with an opening for fixing the upper jaw of the animal and clamping parts. Dimensions of the device: outer diameter of the clamp no more than 55 mm; the vertical diameter of the hole for the surgical field is not more than 25 mm, the horizontal diameter of the hole for the surgical field is not more than 45 mm; the vertical diameter of the hole for fixing the upper jaw is not more than 15 mm, the horizontal diameter of the hole for fixing the upper jaw is not more than 40 mm.

The device is simple in design and reliable in operation, allows you to quickly fix the animal without injuries, has reusable use and is optimal for fixing the head of small laboratory animals during laboratory experiments.

Figure 1 shows a General view of the device.

The device consists of a latch 1, with a hole for the surgical field 2 and a hole for fixing 3 of the upper jaw of the animal. The latch 1 is equipped with clamping parts 4 with fastening elements 5.

The device operates as follows.

After premedication, the animal is placed on the operating table and the fore and hind limbs are pulled out for fixation. The proposed device is put on the head so that the upper jaw extends into the hole for fixing 3 of the upper jaw, and the hole for the surgical field 2 is located between the ears. The clamping parts 4 are led beyond the edges of the operating table and fixed by means of fastening elements 5. The removal of the device after the end of the experiment is carried out in the reverse order.

Example.

The experiment was carried out on rats of the Wistar strain (Stolbovoy nursery) weighing 200-250 g, placed in comfortable temperature conditions, after having been analized with fluorotane vapors. The laboratory rat was placed on a wooden base with four paw clamps. The paws were fixed to a wooden base with rubber. Then, the proposed latch was mounted on the head of the laboratory rat, which was fixed using fasteners in the form of Velcro under a wooden base. After that, a laboratory experiment was conducted.

Claims (1)

An animal head retainer, consisting of a retainer directly with an opening for the surgical field and attachment elements, characterized in that it is made of skin with a thickness of at least 3 mm, is additionally equipped with an opening for fixing the upper jaw of the animal and clamping parts, the device being dimensioned: the outer diameter of the retainer is not more than 55 mm, the vertical diameter of the hole for the surgical field is not more than 25 mm, the horizontal diameter of the hole for the surgical field is not more than 45 mm, the vertical diameter of the hole for fixing the upper jaw no more than 15 mm, horizontal diameter of the hole for fixing the upper jaw no more than 40 mm.