Assay Device with Oxo-biodegradable Casing and Slideable Test Panels
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Solution Overview
Problem
Current home pregnancy test kits face issues with false results due to low hCG levels, user interpretation challenges, and environmental and hygiene concerns, particularly in non-laboratory settings, leading to waste disposal and cross-contamination problems.
Innovation Solution
Development of an immunoassay testing device with an environmentally degradable plastics casing, a slideable test mechanism for improved hygiene, and a two-dimensional color change zone for clear results, using oxo-biodegradable materials and magnetic particles for result indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional pregnancy test kits are used, then the device structure is simple and cost-effective, but the environmental degradation is poor and hygiene is compromised
Solution Approach 1:
The patent changes the material parameter of the device structure from conventional non-degradable plastics to environmentally degradable plastics, maintaining structural simplicity while improving environmental compatibility and hygiene characteristics
Solution Approach 2:
The patent employs composite material construction combining environmentally degradable plastics with magnetic particles and colored materials, achieving both environmental friendliness and functional performance in a cost-effective manner
2Measurement precision
If electronic measurement systems are used, then the measurement precision is improved, but the device complexity and cost increase
Solution Approach 1:
The patent uses color change indication through magnetic particles and colored materials in the test zone, providing clear visual measurement results without requiring complex electronic sensors or control systems
Solution Approach 2:
The patent employs a disposable test device with simple structure that provides adequate measurement precision for home use, eliminating the need for expensive electronic components while maintaining functional effectiveness
3Ease of manufacture
If the test device structure is simplified, then the manufacturing cost is reduced, but the hygiene protection is insufficient
Solution Approach 1:
The patent changes the material parameter to environmentally degradable plastics that inherently provide better hygiene characteristics while maintaining simple device structure and low manufacturing cost
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 device provides clear and reliable results with reduced environmental impact and improved hygiene, facilitating disposal and minimizing cross-contamination risks while being cost-effective and suitable for non-laboratory use.
Implementation Method 1
a zone of magnetic material remote from said substrate, said zone being adapted to capture magnetically said released composition migrating through the zone
Implementation Method 2
the plastics material comprises an oxo-biodegradable plastics material, so adapted that its degradation is initiated by reaction with oxygen
Implementation Method 3
so adapted that its degradation is initiated by reaction with both oxygen and water... adapted to complete its environmental degradation under microbiological action
Implementation Method 4
The hCG hormone is generated from the very early stages of pregnancy... testing for the presence of elevated levels of the hormone human chorionic gonadotrophin (hCG)... based on the use of antibodies to hCG and of antigens adapted to couple with such antibodies
Implementation Method 5
These devices are usually based on a biochemical immunoassay... relying on urine permeating along a test strip of paper or similar material
Data Source
AI summary
An assay test device, suitable for use as a home pregnancy test kit, comprises a casing and two test panels mounted to an elongate arm. The test panels are held within the casing for storage. Manual operation of a slider causes the test panels to project outwardly from an end of the casing, so that a liquid test sample may be administered to the panels. The panels are then withdrawn into the casing, which has a window allowing the test panels to be observed while the test reaction (typically an ELISA test) takes place. Indicia may be applied to reveal messages when a test panel changes color. The casing and other components comprise a polyolefin treated to be oxo-biodegradable or biodegradable, so that they may rapidly break down in aerobic conditions on disposal.