Euthanasia Kit Canister for Rapid Reactant Mixing
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Solution Overview
Problem
Current methods for euthanizing laboratory animals using CO2 gas can cause stress and irritation due to direct or indirect contact with reactants like vinegar and sodium bicarbonate, and lack efficient mechanisms for rapid and simultaneous delivery of these reactants.
Innovation Solution
A kit comprising an enclosure and a canister designed to rapidly and nearly simultaneously deliver sodium bicarbonate and vinegar into a chamber, preventing animal contact with the reactants while ensuring exposure to the resulting CO2 gas, and allowing for use with legacy enclosures and disposable materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If reactants are added separately to the enclosure, then the animal can be isolated from direct contact with reactants, but the delivery time is extended and the animal may be exposed to irritants
Solution Approach 1:
The patent combines both reactants (sodium bicarbonate and vinegar) into a single canister that is inserted into the enclosure at once, allowing them to mix and generate CO2 simultaneously rather than being added separately over time. This merging of reactants into one delivery unit reduces delivery time while maintaining animal isolation through the enclosure floor.
Solution Approach 2:
The patent uses the enclosure floor as an intermediary barrier between the reactants and the animal. The floor allows CO2 gas to pass through to the animal while preventing direct contact between the animal and the liquid/reactant materials, thus mediating between the need for rapid reactant delivery and the need to protect the animal from harmful contact.
2Productivity
If a single canister with both reactants is used, then delivery time is reduced, but the animal may be exposed to irritants through the floor
Solution Approach 1:
The patent applies different properties to different parts of the enclosure floor. The floor is designed to be permeable to CO2 gas (allowing euthanasia to proceed) but impermeable to liquid reactants and large vapor particles. This local quality differentiation allows the floor to selectively allow only the desired gas through while blocking harmful direct contact and excessive vapor exposure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The kit effectively minimizes stress and irritation to animals by ensuring rapid and simultaneous delivery of reactants, preventing direct contact, and enabling humane euthanasia while being compatible with existing setups and disposable.
Implementation Method 1
The canister holds the reactants that are combined to form the euthanizing agent... sodium bicarbonate and vinegar... combined to form the gaseous euthanizing agent 208, in this CO2
Implementation Method 2
The gas is regulated to fill the chamber at a desired rate, and the animals first become unconscious and then die of asphyxiation
Data Source
AI summary
A method and apparatus for a kit is provided for euthanizing animals. The kit makes use of an enclosure and a canister. The enclosure is configured to hold one or more animals. The canister holds the reactants that are combined to form the euthanizing agent and provides a mechanism for the reactants to be delivered to and mixed together in the enclosure. The canister is designed and configured to allow for the reactants to be added rapidly and nearly simultaneously into a chamber while preventing one or more animals held in the enclosure from direct contact with the reactants.