Integrated Desiccant in Analytical Test Strips
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Solution Overview
Problem
Existing diagnostic assay devices face challenges in preventing moisture uptake by reagents during storage, which can lead to contamination and reduced functionality, and current methods for incorporating desiccants often increase manufacturing costs and time.
Innovation Solution
Integration of a desiccant material, such as molecular sieves or silica gels, directly into the analytical test strip, either by lamination or adhesive attachment, to prevent moisture absorption without interfering with the device's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate sachet or compartment is used for the desiccant, then moisture protection is provided, but device complexity and manufacturing time increase
Solution Approach 1:
The desiccant is integrated directly into the test strip structure, merging the moisture protection function with the test strip itself. This eliminates the need for separate sachets or compartments, thereby reducing device complexity while maintaining moisture protection capability.
Solution Approach 2:
The test strip is designed to serve multiple functions: it acts as both the analytical test platform and the moisture barrier by incorporating the desiccant material within its structure. This multi-functionality reduces the overall number of components needed in the device.
2Reliability
If a separate sachet or compartment is used for the desiccant, then moisture protection is provided, but manufacturing time and costs increase
Solution Approach 1:
By combining the desiccant integration with the test strip manufacturing process, the patent reduces the number of separate assembly steps. The desiccant is incorporated during test strip production rather than being added as a separate component, thereby decreasing manufacturing time and improving productivity.
3Productivity
If the desiccant is integrated into the test strip, then manufacturing efficiency is improved, but there is risk of reagent contamination or interference
Solution Approach 1:
The desiccant is placed in specific locations on the test strip where it can effectively protect reagents without coming into direct contact with them. This localized placement ensures moisture protection while preventing contamination or interference with the analytical reagents.
Solution Approach 2:
The test strip structure itself acts as an intermediary between the desiccant and the reagents. The desiccant is integrated into the test strip but separated from direct contact with reagents, allowing the test strip to mediate and prevent any potential contamination while still providing moisture protection.
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 integrated desiccant enhances the stability and manufacturability of diagnostic devices, reducing the risk of reagent contamination and improving shelf-life by maintaining reagent functionality during storage, as demonstrated by consistent positive test line results for analyte detection over time.
Implementation Method 1
Chemical drying agents, e.g., desiccants, for absorbing/adsorbing moisture are known in the art
Implementation Method 2
Chemical drying agents, e.g., desiccants, for absorbing/adsorbing moisture are known in the art
Data Source
AI summary
An analytical device for performing an assay to determine the presence or approximate quantity of at least one analyte in a liquid sample is described. The device is manufactured to include an integrated desiccant within at least a test strip of the device. Addition of an integrated desiccant within the device improves signal to noise ratio, eases the manufacturing process, and saves in cost of production of the device.