Lateral Flow Test Strip Layout to Prevent Test Area Interference
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Solution Overview
Problem
Existing rapid chemical tests for liquid samples, such as test strips, suffer from interference between different test areas due to liquid mixing, leading to inaccurate results and contamination risks.
Innovation Solution
A lateral flow testing device with separate fluid paths for each test area, using absorbent materials with controlled flow rates and directions to prevent interference, ensuring independent reactions and reducing reagent diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single liquid flow path is used to carry the liquid sample through multiple test pads, then the device complexity is reduced and ease of manufacture is improved, but the test accuracy deteriorates due to interference between different test areas caused by liquid mixing and reagent diffusion
Solution Approach 1:
The patent divides the single liquid flow path into multiple independent flow paths, with each test pad having its own dedicated flow path. This segmentation prevents liquid mixing between test areas and eliminates reagent diffusion interference, thereby improving test accuracy while maintaining relatively simple device structure through modular design
2Ease of operation
If test pads are arranged on a single absorbent material, then the ease of operation is improved and the device complexity is reduced, but the reliability of test results deteriorates due to reverse flow of liquid and interference between test areas
Solution Approach 1:
The patent segments the absorbent material into multiple separate absorbent materials, each corresponding to a specific test pad and flow path. This prevents reverse flow of liquid from one test area to another and eliminates interference between tests, ensuring reliable test results while maintaining ease of operation through simplified sample application
Solution Approach 2:
Each absorbent material is optimized locally for its specific test pad requirements, with properties tailored to control liquid flow rate and direction for that particular test area. This local optimization ensures reliable test results by preventing cross-contamination while maintaining overall operational simplicity
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 accurate and contamination-free testing by isolating reactions on separate fluid paths, minimizing reagent interference and ensuring reliable test results.
Implementation Method 1
a first absorbent material for carrying the liquid sample through the test strip; a second absorbent material for carrying the liquid sample through the test strip
Data Source
AI summary
The invention provides a testing device, and the testing device includes: a first absorbent material for contacting a liquid sample, wherein a first test area is arranged on the first absorbent material; and a second absorbent material for contacting the liquid sample, wherein a second test area is arranged on the second absorbent material. In a preferred embodiment, a flow rate of the liquid sample on the first absorbent material is smaller than a flow rate of the liquid sample on the second absorbent material.