Digital LFA Reader Fixture for Quantitative Point-of-Care Testing
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Solution Overview
Problem
Current lateral flow chromatographic immunoassay tests are limited to providing qualitative results, lacking the capability to deliver quantitative data, which hinders precise point-of-care diagnostics.
Innovation Solution
A device and system that integrates a digital reader with a base plate for receiving multiple lateral flow assay cartridges, allowing for the digital reading of assay regions and control zones, enabling quantitative analysis of samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lateral flow chromatographic immunoassay tests are used for point-of-care testing, then ease of use and quick results are achieved, but only qualitative results can be obtained without quantitative data
Solution Approach 1:
The patent combines a digital reader device with a base plate that has multiple LFA cartridge receiving positions, integrating qualitative and quantitative analysis capabilities into a single system. The digital reader captures images of the assay regions and control zones, then processes this data to provide quantitative measurements of analyte concentrations.
Solution Approach 2:
The device serves multiple functions: it can hold multiple LFA cartridges simultaneously, capture images of assay regions, analyze control zones to validate tests, and provide both qualitative and quantitative results. This multi-functionality allows a single device to replace both simple qualitative test strips and complex quantitative laboratory equipment.
2Adaptability or versatility
If multiple LFA cartridges are positioned on a base plate, then flexibility in sample testing is improved, but device complexity increases
Solution Approach 1:
The base plate is divided into multiple receiving positions, each capable of holding an LFA cartridge independently. This segmentation allows users to test multiple samples simultaneously or perform replicate tests, increasing flexibility without requiring a completely new device for each function.
Solution Approach 2:
The base plate acts as an intermediary structure that organizes and positions multiple LFA cartridges in a standardized manner. It provides a fixed orientation relative to the digital reader, ensuring consistent image capture while simplifying the user interface for loading and removing cartridges.
3Measurement precision
If digital reading is implemented for LFA cartridges, then quantitative results are achieved, but the simplicity and ease of operation are reduced
Solution Approach 1:
The digital reader automatically captures images of the LFA cartridges, identifies assay regions and control zones, and performs the quantitative analysis without requiring user intervention. The system self-calibrates and processes results, reducing the operational burden on users while maintaining high measurement precision.
Solution Approach 2:
The device transforms the visual information from the LFA cartridges into quantitative numerical data by analyzing parameters such as signal intensity, colorimetric changes, or optical density. This parameter transformation enables quantitative results while the automated processing maintains ease of operation.
Data Source
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AI summary
A device for receiving a digital reader and a lateral flow assay (LFA) cartridge and systems incorporating the same are provided. Aspects of the device include a body having a frame configured to receive the digital reader and a base plate having one or more LFA cartridge receiving positions for positioning one or more LFA cartridges at a fixed orientation relative to a planar space defined by the frame. Also provided are methods for using the device to read a result indicative of the presence or absence of an analyte in a sample.