Lateral Flow Test Strip Layout to Prevent Pad-to-Pad Interference
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Solution Overview
Problem
Existing technologies fail to effectively address the mixing of liquids among different test pads in traditional products, leading to interference in test results, and the diffusion of colored substances on reaction pads due to the forward flow of liquids, causing inaccurate test results.
Innovation Solution
A lateral flow testing device with separate absorbent materials for each test area, ensuring liquids flow independently through distinct paths, preventing interference and diffusion by using impermeable membranes and varying flow rates to control liquid flow, and incorporating absorbent materials, absorbent materials, and absorbent materials that absorb liquids, ensuring liquids independently contact with various test areas, absorbent materials, and absorbent materials that absorb liquids, ensuring liquids independently contact with various test areas, preventing interference and diffusion by using absorbent materials with different flow rates and absorbent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single liquid flow path is used to carry samples through multiple test pads, then the device complexity is reduced, but liquids among different test pads mix causing interference in test results
Solution Approach 1:
The patent divides the single liquid flow path into multiple independent flow paths, with each path dedicated to carrying liquid through specific test pads. This segmentation prevents mixing of liquids among different test pads while maintaining a relatively simple overall device structure.
2Ease of operation
If colored substances are allowed to diffuse with the forward flow of liquid, then the test process is simplified, but test result accuracy deteriorates due to interference from diffused colored substances
Solution Approach 1:
The patent extracts and removes colored substances from the liquid flow path using absorbent materials positioned to capture these substances before they can diffuse to other test pads. This maintains test process simplicity while preventing interference with test results.
3Device complexity
If traditional test strips are used with direct dipping and reading, then the device complexity is minimized, but operator contamination risk increases due to required device opening
Solution Approach 1:
The patent combines multiple test pads into a single integrated test strip that processes multiple analytes simultaneously through independent flow paths. This maintains minimal device complexity while eliminating the need to open the device, thereby preventing operator contamination.
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 solution effectively prevents interference and diffusion of colored substances, ensuring accurate test results by maintaining independent flow paths for each test area, thereby enhancing the reliability of chemical testing devices.
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
Implementation Method 2
preventing interference and diffusion by using impermeable membranes and varying flow rates to control liquid flow
Data Source
Figure 1~2B
Figure 2C~4
Figure 5~7
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.