Mobile Allergen Exposure Unit with Mixing Chamber
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Solution Overview
Problem
Existing allergy test chambers are large, fixed systems that struggle to maintain a homogeneous and constant allergen concentration, are costly to operate, and have difficulty recruiting enough patients due to geographical limitations and high recruitment costs, leading to inefficient use and increased study costs.
Innovation Solution
A mobile, transportable allergen exposure unit that is autonomous, compact, and can be used immediately upon arrival, featuring a nebulizer-type allergen injection device and a mixing chamber for homogeneous allergen distribution, allowing for flexible patient recruitment and reduced operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large-scale fixed allergy test chambers are used to accommodate large numbers of patients simultaneously, then patient capacity is improved, but device complexity and operational cost increase significantly
Solution Approach 1:
The invention divides the large-scale exposure system into multiple independent mobile units, each capable of accommodating a smaller number of patients. This segmentation allows the overall productivity to be maintained or improved while reducing the complexity of each individual unit, making them easier to operate and deploy.
Solution Approach 2:
The invention transitions from fixed, stationary chambers to mobile, transportable units that can be dynamically deployed to multiple locations. This dynamic approach allows flexible patient recruitment across different geographical areas while maintaining controlled exposure conditions, effectively increasing patient capacity without requiring large fixed installations.
2Reliability
If fixed buildings or structures are used for allergy test chambers, then stability and controlled environment are improved, but adaptability and mobility are worsened
Solution Approach 1:
The invention employs mobile units with enclosed structures that provide controlled environments similar to fixed buildings but with the added flexibility of mobility. These units maintain reliable environmental control for allergen exposure while being transportable to different locations, thus achieving both stability and adaptability.
Solution Approach 2:
The mobile units are designed to be universally deployable across multiple locations while maintaining the same controlled exposure conditions as fixed chambers. This multi-functionality allows the system to adapt to different geographical areas and patient populations without compromising environmental control or reliability.
3Speed
If strong turbulent air current or fans are used for mixing air and allergen particles in the exposure room, then mixing speed is improved, but allergen homogeneity and particle integrity are worsened
Solution Approach 1:
The invention replaces the mechanical mixing system (fans and turbulent air currents) with a diffusion-based mixing approach. Allergen particles are introduced into the exposure room and distributed through natural air diffusion and gentle convection, eliminating the need for high-speed mechanical mixing while achieving homogeneous distribution and preserving particle integrity.
4Loss of substance
If recycling of injected substance through closed circuit is used, then allergen usage efficiency is improved, but concentration constancy is worsened
Solution Approach 1:
The mobile units are designed to be autonomous and self-sufficient, with onboard allergen storage and delivery systems. Rather than relying on external recycling infrastructure that compromises concentration control, each unit independently manages its allergen supply, maintaining constant concentrations through precise dosing and fresh allergen replenishment as needed.
5Reliability
If fixed systems requiring large installations are used, then controlled exposure conditions are improved, but ease of deployment and patient accessibility are worsened
Solution Approach 1:
The invention extracts the essential controlled exposure functionality from large fixed installations and consolidates it into compact mobile units. By taking out only the critical components needed for controlled allergen exposure and placing them in transportable formats, the system maintains exposure control reliability while dramatically improving deployment flexibility and patient accessibility.
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 mobile unit enables efficient, cost-effective allergen exposure studies by increasing patient accessibility, optimizing study filling, and reducing operational costs through flexible deployment and reduced allergen consumption, while maintaining controlled and homogeneous allergen concentrations.
Implementation Method 1
The particles are simply sucked in by the Venturi effect and entrained without any real mixing between the different flows.
Implementation Method 2
the mixing between the air and the allergen particles takes place directly in the exposure room by means of a strong turbulent air current
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A unit (1) for exposure to allergens is intended to accommodate one or more patients with a view to allergic provocation. The unit is mobile and has: a confined exposure compartment (4); an entry or exit airlock (8) of the exposure compartment; a nebulizer (19) which produces a flow of allergen particles from an aqueous composition of allergens; an air treatment system (20) which aspirates the outside air and treats it in order to form a flow of air free of allergens; and a mixing chamber (22) in which the flow of allergen particles and the flow of air free of allergens mix together and which communicates with the exposure compartment in order to convey to the latter the air charged with allergen particles resulting from the mixing.