Capillary Extraction Guide for Sealed Immunochromatography Testing
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Solution Overview
Problem
Existing test devices for immunochromatography require manual dropwise addition of extraction solutions, which is cumbersome and prone to splattering, making it difficult to achieve accurate and safe testing for infectious specimens.
Innovation Solution
A test device with a tubular guiding member featuring capillary action, allowing the extraction solution to flow from an inflow port to an outflow port, which contacts the testing means, enabling sealed and reliable introduction of the solution without manual handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual dropwise addition of extraction solution is used, then the test operation can be performed, but the operation becomes cumbersome and prone to splattering, reducing safety and accuracy
Solution Approach 1:
A guiding member with a guide hole serves as an intermediary structure between the extraction solution container and the test strip. The guide hole constrains the flow path of the extraction solution, directing it precisely to the test strip while preventing splattering and leakage. This intermediary structure eliminates the need for manual dropwise addition, thereby improving both ease of operation and safety.
Solution Approach 2:
The patent replaces the manual mechanical operation of dropwise addition with a structured flow path defined by the guiding member. The guide hole provides a predetermined route for the extraction solution to flow along, substituting the manual control mechanism with a passive structural guidance system that inherently prevents splattering and ensures accurate delivery.
2Quantity of substance
If manual dropwise addition of extraction solution is used, then the test can be performed, but accurate addition of predetermined amount becomes difficult
Solution Approach 1:
The guiding member with its constrained guide hole acts as an intermediary that controls the flow of extraction solution. The fixed geometry of the guide hole ensures that the solution flows in a predetermined path and amount, eliminating the variability and imprecision associated with manual dropwise addition. This structural intermediary provides accurate dosing automatically.
Solution Approach 2:
The patent changes the operational parameter from manual control of drop size and number to structured flow through a defined channel. The guide hole's dimensions and orientation establish fixed flow characteristics, transforming the variable manual process into a consistent, accurate delivery system where the amount of extraction solution is controlled by the physical parameters of the guiding structure rather than human operation.
3Ease of operation
If extraction solution is added from an open container, then the solution can be applied to test strip, but the system becomes non-closed (open), increasing risk of contamination and leakage
Solution Approach 1:
The guiding member serves as an intermediary structure that maintains system closure during the extraction solution delivery process. By providing an enclosed guide hole through which the solution must flow, the guiding member prevents the system from becoming open, thereby eliminating the risk of contamination and leakage while still enabling the extraction solution to reach the test strip effectively.
Solution Approach 2:
The guiding member with its guide hole creates a closed pathway that contains the extraction solution throughout the transfer process. This structural enclosure acts similarly to a flexible shell, maintaining system integrity and preventing exposure to the external environment, thus preserving the closed-system advantage while enabling solution delivery.
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
Facilitates safe, efficient, and accurate addition of the extraction solution to the test strip, preventing contamination and leakage, and allowing for closed-system testing, thereby enhancing operational safety and ease of use.
Implementation Method 1
a rod-shaped extraction solution guide having capillary action and having one end at the extraction solution outflow port side able to contact the testing means so that the extraction solution absorbed from the extraction solution inflow port side at the extraction solution guide moves by capillary action through the inside of the extraction solution guide
Data Source
AI summary
The test device is provided with a testing means for testing an added extraction solution utilizing immunochromatography or nucleic acid chromatography, an extraction solution container, and a tubular guiding member having an extraction solution inflow port communicating with the extraction container in a sealed manner at one end side and having an extraction solution outflow port at the other end side. The guiding member is configured so as to have inside the tube a rod-shaped extraction solution guide having capillary action and having one end at the extraction solution outflow port side able to contact the testing means and so that the extraction solution absorbed from the extraction solution inflow port side at the extraction solution guide moves by capillary action through the inside of the extraction solution guide and is added to the testing means through the one end of the extraction solution guide contacting the testing means.