RU24097U1 - MASK FOR MANAGEMENT OF INHALATION ANNESTICISM WITH SMALL EXPERIMENTAL ANIMALS AT EXPERIMENTAL STUDIES - Google Patents

Abstract

1. A mask for administering inhalation anesthesia to small experimental animals during experimental studies, comprising a housing for inhalation anesthetic, characterized in that the base of the mask is equipped with a handle for setting the mask to its original position, which makes it easy to move the mask some distance from the head of the experimental animal in case of weakened breathing and reduce the concentration of inhalation anesthetic in the inhaled mixture. 2. A mask for administering inhaled anesthesia to small experimental animals during the experimental studies according to claim 1, characterized in that the body is made of a metal frame, which is covered with a transparent material for visual observation of the test animal material, for example polyethylene.

Description

Mask for the introduction of inhalation anesthesia to small petty animals in experimental experiments

The utility model relates to the field of experimental medicine, namely to devices for surgical operations on experimental animals and can be used for inhalation anesthesia in small experimental animals, for example, rats.

It is known (in practice) to administer inhaled anesthetics, in particular ether, by direct contact of the animal with tissue (cotton, etc.) impregnated with ether. However, a significant drawback of using fleece with ether or another inhalation anesthetic is the insufficient concentration of anesthetic substance in the air mixture inhaled by experimental animals, and the inability to control the concentration of ether or other inhalation agent for general anesthesia. This is due to the fact that ether and drute inhalation feeds for general anesthesia are highly volatile and evaporate quickly, which, in turn, leads, first, to less deep anesthesia, and therefore, the animal feels pain and any surgical operations on it becomes difficult. In addition, the animal researcher is also forced to breathe this mixture. In addition, the researcher has to constantly moisten the fleece, which leads to an unreasonably high and irrationally large consumption of expensive and easily volatile drug (ether).

The proposed utility model, a mask for inhalation anesthesia, avoids these significant drawbacks.

The applicant does not know any devices for delivering inhaled anesthetics to small experimental animals.

However, the applicant is aware of the combination of common functional features close to the claimed device, an inhalation mask. (RF patent dated 05/21/1997 No. 2120312). The device described in the aforementioned patent is intended for supplying drugs in an optimal concentration. The known device, as the closest analogue, contains common features with the claimed utility model: a case with a base and a top.

MKI: A61M15 / 00-16 / 00

The technical result of the proposed utility model is to increase the efficiency of inhalation anesthesia by feeding the animal an optimal anesthetic mixture, protecting researchers from inhaling drugs and saving the cost of an expensive drug.

This technical result is achieved due to the proposed utility model - a mask for conducting inhalation anesthesia during experimental studies on small experimental animals, the scheme of which is shown in the figure.

The mask contains a cube-shaped body (1), which consists of a metal frame covered with polyethylene; handle (2) to set the mask to its original position.

The work of the proposed utility model is as follows. In the body (1) is placed a cotton wool previously moistened in a means for inhalation anesthesia. The body (1) with the handle (2) is placed on the head of the experimental animal. If the breathing is weakened, the mask can be removed from the animal's face by a certain distance, thereby reducing the concentration of the inhaled anesthetic in the inhaled mixture.

The claimed utility model is a mask for conducting inhalation anesthesia in experimental studies on small experimental animals; it is industrially applicable; it has been tested in real experimental conditions; showed an advantage compared to known analogues and was implemented in a number of experiments conducted at the Institute of Experimental Medicine (St. Petersburg) and was confirmed by the following examples.

Example 1

An inhalation anesthesia mask was used in an opgge over a stress-resistant line of rats, in particular, over the Sprague Doybey type, and showed good results. At the same time, when trying to inject them into the anesthesia using known methods, namely, using fleece placed next to the rat's face, the creeps of this line ended in failure, and when using the claimed utility model they easily fell asleep. The claimed device was used when performing experimental studies on 100 fys, in particular 95 rats of the Viester line and 5 rats of the stress-resistant line of Sprague Doybey. The experiments were conducted at the Institute of Experimental Medicine in St. Petersburg. The effectiveness of the practical implementation of the proposed mask for inhalation anesthesia during experimental studies on small experimental animals was evaluated by the rate of rats being anesthetized and their condition during the experiment.

In addition, for comparison, identification and confirmation of the technical result, the stress-resistant Sprague Doybey strain was evaluated in 95 Viester rats and 5 rats when they were anesthetized with fleece and ether or other inhalation agents for general anesthesia.

The experimental results are presented in the table. As can be seen from the table, the time required for the introduction of anesthesia in experimental animals, in particular rats, is three times less in comparison with the methods used in practice. From the data in the table shows that the use of the claimed mask

for conducting inhalation anesthesia in experimental studies on small experimental animals, it was possible to significantly reduce the time of introduction to anesthesia, as well as to increase the time spent in the test animal.

The results of the experiments showed that the claimed utility model, in practical testing, showed a real technical result - a significant advantage compared to the prototype, which consists in a significant reduction in the time of anesthesia, a reduction in the cost of ether or other inhalation means for general anesthesia, as well as protection of the researcher from ether vapor or other inhalation agent for general anesthesia.

Representative of the Applicant, Head of the Department of Intellectual Property, Patents and Licenses / / I.F. Leonov

Comparative performance characteristics

proposed utility model

Rats of the Vestern line

The time of administration of anesthesia in rats with a cotton wool moistened with ether or other inhalation agent for general anesthesia.

The time of introduction into rat anesthesia using the proposed utility model.

Rats of the Sprague Dowbey line

Virtually not introduced.

1.5 minutes

Claims (2)

1. A mask for administering inhalation anesthesia to small experimental animals during experimental studies, comprising a housing for inhalation anesthetic, characterized in that the base of the mask is equipped with a handle for setting the mask to its original position, which makes it easy to move the mask some distance from the head of the experimental animal in case of weakened breathing and reduce the concentration of inhaled anesthetic in the inhaled mixture. 2. The mask for the introduction of inhalation anesthesia to small experimental animals during the experimental studies according to claim 1, characterized in that the body is made of a metal frame, which is covered with a transparent for visual observation of the test animal material, for example polyethylene.