JP2007060925A - Method for mercy killing of animal and apparatus for mercy killing for animal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for mercy killing of an animal comprising minimizing pain until the animal loses consciousness and the pain during the killing by efficiently using an anesthetic in a volume suitable for each objective animal in the method for mercy killing comprising anesthetizing the animal and then subjecting the animal to death from suffocation and to provide an apparatus for mercy killing for the animal. <P>SOLUTION: The method for mercy killing of the animal is carried out as follows. The animal is housed in a treatment chamber of a prescribed volume and an anesthetic gas evaporated at a prescribed rate with an anesthetic liquid evaporator is supplied into the treatment chamber to make the animal inhale the anesthetic gas and thereby anesthetize the animal. The interior of the treatment chamber is then kept in a state of oxygen deficiency and the animal is subjected to mercy killing. Furthermore, the apparatus for mercy killing for the animal is provided. Thereby, the pain of the animal to be killed to the death can be suppressed by using the apparatus for mercy killing for the animal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of euthanizing an animal and an animal euthanasia apparatus.

Wandering animals abandoned and captured by their owners are housed in animal management centers and insurance facilities, etc. If no new owner is found within a certain period of time, they are placed in the processing room and killed. Examples of killing methods include suffocation death by carbon dioxide gas, euthanasia using anesthesia, and the like.
JP 2003-38090 A Special table 2001-512305 gazette

  In the conventional suffocation killing method, it takes a long time for the animal to die unconsciously, and the respiratory rate increases before losing consciousness, crying and panting, Many animals show tremors and other symptoms, causing excessive pain to the animals at the time of sacrifice.

  On the other hand, there is a method of euthanasia in which an animal is anesthetized and then killed by suffocation. In this method, the animal loses consciousness by anesthesia, and subsequently causes cardiopulmonary function stop and eventual brain function stop, so that it is possible to suppress the pain experienced until the consciousness is lost. However, since the amount of anesthesia used that can cause the animal to lose consciousness varies depending on the target animal, caution is required for the proper use of anesthetics.

  Therefore, in the method of euthanasia in which an animal is anesthetized and then disposed of by suffocation, the anesthetic is efficiently used and the volume suitable for each target animal is used, until the animal loses consciousness. Provided are a euthanasia method and an euthanasia apparatus that minimize pain and slaughter.

  The present inventor has studied an animal euthanasia method and an euthanasia apparatus in order to solve the aforementioned problems. Specifically, we thought that if an appropriate amount of anesthetics was applied to an animal quickly and efficiently, the time it takes to lose the animal's consciousness could be shortened, and the pain leading to the death of the animal could be eased. . In addition, we considered that it would be possible to save the use of expensive anesthetics by using an appropriate amount.

  Methods for anesthetizing animals include injection methods, mouse inhalation methods, etc., but these methods require direct contact with the animals, and violent animals place an excessive burden on the dispositioner. Therefore, it was decided to use a method of vaporizing the anesthetic and letting the animal inhale the anesthetic gas.

  Next, in order to make an anesthetic gas act on an animal quickly, it is necessary to vaporize an anesthetic liquid rapidly. The inventor studied a method of creating an anesthetic gas by immersing a bubbling nozzle in a predetermined amount of an anesthetic solution and generating bubbles by directly acting oxygen and the anesthetic solution. However, since the temperature of the anesthetic liquid is lowered by the heat of vaporization when the anesthetic liquid is vaporized, the vaporization speed of the anesthetic liquid is slowed down and the time until the animal is anesthetized becomes long.

  Therefore, focusing attention on preventing a decrease in the vaporization rate by providing a heater in the tank in which the anesthetic solution is stored, and proceeded with studies, the temperature of the anesthetic solution was adjusted by adjusting the temperature inside the tank using the heater. Knowing that the vaporization rate can be adjusted and the anesthetic gas can be supplied quantitatively, the present invention has been completed.

  That is, the present invention accommodates an animal in a treatment chamber having a predetermined volume, supplies anesthesia gas vaporized at a predetermined rate by an anesthetic liquid vaporizer into the treatment chamber, and causes the animal to inhale anesthesia gas. In this method, the animal is euthanized by placing the treatment chamber in an oxygen deficient state after being applied. By supplying anesthetic gas into the treatment chamber from an anesthetic liquid vaporizer that can rapidly vaporize the anesthetic liquid, the animal can be quickly anesthetized. Further, by providing a stirrer in the lower part of the floor plate having air permeability in the processing chamber, it is possible to effectively anesthetize the animal by diffusing the anesthetic gas.

  Further, when the number of animals to be processed is small, the surplus volume in the processing chamber increases as compared to the case where the number of individuals is large, and the concentration of anesthetic gas in the processing chamber is reduced. In this case, the amount of anesthetic gas used can be reduced by partitioning the processing chamber or putting a box or the like having a specific volume in the processing chamber to reduce the volume satisfying the anesthetic gas. In addition, since the internal volume of the processing chamber is reduced, the diffusion of anesthetic gas is accelerated.

  Further, in the above-mentioned euthanasia method, oxygen was introduced into the anesthetic liquid through a bubbling nozzle while adjusting the temperature inside the anesthetic vaporizer with a temperature adjusting heater, and a predetermined amount of anesthetic gas was generated. By supplying the anesthetic gas into the processing chamber, quantitative anesthetic gas can be supplied.

  The present invention also includes a processing chamber in which an animal is housed, an exhaust fan for exhausting the gas in the processing chamber, an anesthetic gas supply path for introducing the anesthetic gas vaporized by the anesthetic liquid vaporizer, and the processing chamber. An animal euthanasia device equipped with a suffocation gas supply path for introducing a suffocation gas into the suffocation gas. By supplying anesthesia gas into the treatment chamber from an anesthetic liquid vaporizer that can vaporize the anesthetic liquid, the animal can be quickly anesthetized. Further, by providing a stirrer under the breathable flooring, anesthesia gas can be diffused to effectively anesthetize the animal.

  The anesthetic liquid vaporizer is provided with an anesthetic liquid introduction part, a bubbling nozzle, and a temperature adjusting heater. When a small amount of air is blown from the bubbling nozzle into the anesthetic solution to generate anesthetic gas, the vaporization rate is reduced by removing heat from the anesthetic solution as the heat of vaporization. The target vaporization rate can be maintained, and the anesthetic solution can be vaporized quantitatively.

  According to the present invention, an euthanasia method and an euthanasia apparatus capable of effectively vaporizing an anesthetic solution and relieving pain until the animal dies are completed.

  Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram illustrating a euthanasia apparatus according to an embodiment of the present invention. The processing chamber 1 preferably has a structure that can be hermetically sealed, and is provided with an exhaust fan 3 with a shutter that can ventilate the outside and an oxygen concentration sensor 4 that detects the oxygen concentration. The bottom part has a double structure. The processing chamber 1 is connected to the anesthetic liquid vaporizer 2 and the anesthetic gas supply path 5, and the carbon dioxide gas cylinder is connected to the processing chamber 1 by the supply path 7, and an electromagnetic for controlling the amount of carbon dioxide in the supply path 7. A valve 8 is provided and controlled so as to have a set oxygen concentration. A stirrer 6 was installed below the punching metal 9. Hereinafter, the method of euthanizing an animal will be described with reference to FIG.

  An animal is accommodated in the processing chamber 1. The electromagnetic valve 8 is opened and oxygen gas 10 is supplied to the anesthetic liquid vaporizer 2. The anesthetic gas generated by the anesthetic liquid vaporizer is supplied into the processing chamber 1 from the anesthetic gas supply path 5.

  In this example, a raccoon with a body weight of 5 kilograms was used as a target animal, a treatment chamber having an internal volume of 340 L was used, and 46.7 ml of isoflurane was used as an anesthetic solution. Moreover, the concentration of the isoflurane in the treatment chamber was adjusted to 2.5% by adjusting the anesthetic vaporizer so that 46.7 ml of isoflurane could be vaporized in 3 minutes.

  When supplying the generated anesthetic gas into the processing chamber, the anesthetic gas can be diffused more effectively by operating the stirrer 6. After the subject animal is anesthetized, carbon dioxide gas 11 is supplied from the bottom of the processing chamber in order to place the processing chamber in a suffocated state. The carbon dioxide gas 11 is filled from the bottom, passes through the punching metal 9, and at least fills the animal lying on it, causing the animal to suffocate and die.

  As the anesthetic gas, isoflurane was used in this example, but nitrous oxide, halothane, methoxyflurane, enflurane, and the like can also be used. Further, although carbon dioxide gas is used as the suffocation gas, nitrogen or the like can also be used. Moreover, although the punching metal was used as the flooring material, so-called slatted flooring material can be used as long as the animal does not fall to the bottom and does not hinder gas convection by the stirrer.

  FIG. 2 is a schematic view illustrating an anesthetic liquid vaporizer of the euthanasia apparatus according to the embodiment of the present invention. The anesthetic liquid vaporizer 2 is a hermetically sealed container, and includes an outer cylinder tempered glass 19, an inner heating cylinder 20, and a bubbling nozzle 17. The temperature of the heating cylinder can be set by the temperature sensor 15 and the dial 16, and the temperature can be controlled by using the heater 14. A predetermined amount of anesthetic liquid 21 is added from the anesthetic liquid measuring cup 18 to the inside of the anesthetic liquid vaporizer, and oxygen is ejected from the bubbling nozzle 17 to directly contact the anesthetic liquid 21 to generate a wet gas. The wet gas evaporates by obtaining heat from the surroundings, and becomes a dry gas when entering the processing chamber 1. The oxygen flow rate is controlled by the flow rate sensor 12 and the electromagnetic valve 13.

  The concentration of anesthesia gas required varies depending on the target animal, but since the anesthetic gas can be quantitatively supplied by adjusting the vaporization rate with the anesthetic vaporizer of the present invention, for example, a predetermined time set even during processing with different numbers of individuals Can cause animal consciousness to disappear. For this reason, the suffocation gas can be supplied after a predetermined time has passed without confirming that the animal has lost consciousness each time, and the burden on the processing person can be reduced.

  In addition, when the number of animals is small or the target is small animals in a processing chamber with an internal volume that assumes processing of multiple solids, a partition is placed in the processing chamber to reduce the volume of the space for accommodating animals. Is preferred. This is because the supply amount of the anesthetic gas is reduced and the diffusion of the anesthetic gas is accelerated. A similar effect can be obtained by placing a box or the like having a large volume in the processing chamber.

  The animal euthanasia method and euthanasia apparatus according to the present invention can be used in an animal management center, a health center, or the like where an animal needs to be killed.

It is the schematic which shows the animal euthanasia apparatus which is one of embodiment of this invention. It is the schematic which shows the anesthetic liquid vaporizer which is one of the embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing chamber 2 Anesthetic liquid vaporizer 3 Exhaust fan 4 Oxygen concentration sensor 5 Anesthetic gas supply path 6 Stirrer 7 Asphyxiation gas supply path 8 Electromagnetic valve 9 Punching metal 10 Oxygen gas 11 Carbon dioxide gas 12 Flow rate sensor 13 Electromagnetic valve 14 Heater 15 Temperature sensor 16 Dial 17 Bubbling nozzle 18 Anesthetic liquid measuring cup 19 Tempered glass 20 Heating cylinder 21 Anesthetic liquid 100 Animal euthanasia device

Claims (7)

House animals in the processing chamber,
An anesthetic gas vaporized by an anesthetic liquid vaporizer is supplied into the processing chamber,
After anesthetizing the animal by inhaling anesthetic gas,
A method of euthanizing an animal with an oxygen deficiency in the treatment chamber. The method of euthanizing an animal according to claim 1, wherein the animal is anesthetized by diffusing the anesthetic gas in the treatment chamber by providing a stirrer at the lower part of the floor material having air permeability. 2. The method of euthanizing an animal according to claim 1, wherein the concentration of the anesthetic gas in the processing chamber is adjusted by changing the volume in the processing chamber. In the anesthetic liquid vaporizer,
While adjusting the temperature inside the anesthetic liquid vaporizer with a temperature adjusting heater, oxygen is introduced into the anesthetic liquid from a bubbling nozzle to generate anesthetic gas,
4. The method of euthanizing an animal according to claim 1 to claim 3, wherein the generated anesthetic gas is supplied into the processing chamber. A treatment room capable of containing animals;
An exhaust fan for exhausting the gas in the processing chamber;
An anesthetic gas supply path for introducing the anesthetic gas vaporized by the anesthetic liquid vaporizer into the processing chamber;
A suffocation gas supply channel for introducing suffocation gas into the processing chamber;
Animal euthanasia equipment. A treatment room capable of containing animals;
An exhaust fan for exhausting the gas in the processing chamber;
An anesthetic gas supply path for introducing the anesthetic gas vaporized by the anesthetic liquid vaporizer into the processing chamber;
A suffocation gas supply channel for introducing suffocation gas into the processing chamber;
A stirrer for diffusing the gas in the processing chamber to the lower part of the floor material having air permeability;
Animal euthanasia equipment. An anesthetic liquid introduction part inside the anesthetic liquid vaporizer,
A bubbling nozzle;
Equipped with a temperature control heater,
The animal euthanasia apparatus according to claim 5, wherein the animal euthanasia apparatus is connected to a processing chamber via an anesthetic gas supply path.

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