Lateral Flow Assay Reader with Continuous Optical Detection
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Solution Overview
Problem
Traditional lateral flow assay systems face challenges in speed, cost, ruggedness, ease of use, and reliability, particularly in non-laboratory settings, and are susceptible to contamination and fraudulent use due to operator interaction and lack of real-time monitoring.
Innovation Solution
A lateral flow assay system incorporating an incubator, reader, and user interface with graphical display for continuous image detection, using an optical detector and microprocessor to assess diagnostic test development, reducing operator interaction and enhancing reliability through frequent data updates and debris protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional lateral flow assay systems are used with manual operation, then operator flexibility is maintained, but testing speed is slow and contamination risks increase
Solution Approach 1:
The system enables self-service operation where the assay strip automatically progresses through incubation and detection phases without manual intervention. The strip is loaded once and the system autonomously manages the entire testing process, eliminating the need for continuous operator interaction while maintaining testing accuracy and reducing contamination risks.
Solution Approach 2:
Manual mechanical operations are replaced with an automated system that uses programmed mechanical movements, optical detection, and electronic control. The system substitutes human hands and eyes with robotic positioning mechanisms and optical sensors, thereby increasing speed and precision while reducing operator exposure to potential contaminants.
2Measurement precision
If frequent image detection is implemented, then test development assessment is improved, but data processing complexity increases
Solution Approach 1:
The system implements continuous feedback by capturing multiple images during assay development and comparing them against expected patterns. Each image provides real-time information about test progression, allowing the system to assess development quality and detect anomalies. The feedback loop enables automatic adjustment and validation without overwhelming manual data processing requirements.
Solution Approach 2:
The system captures more images than strictly necessary for basic result determination, using the excess data to improve assessment precision. By taking frequent images throughout the development process, the system gains redundant information that enhances measurement accuracy and provides a more comprehensive view of assay progression, with processing handled automatically.
3Reliability
If operator interaction is reduced, then contamination risks are minimized, but ease of operation may be compromised
Solution Approach 1:
The system is designed for minimal interaction by implementing self-service loading and automated processing. The user simply loads the assay strip and initiates the test, after which the system manages all subsequent steps autonomously. This approach maintains ease of operation for the initial setup while eliminating continuous manual handling that would increase contamination risks during critical detection phases.
Solution Approach 2:
The system performs preliminary actions by pre-positioning components and preparing the detection environment before the assay strip is loaded. By anticipating and preparing for each step in advance, the system reduces the need for frequent operator interventions, thereby minimizing contamination opportunities while maintaining operational simplicity for the user.
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 system provides rapid, reliable, and accurate analyte detection with reduced contamination risks and operator interaction, enabling quicker results and improved test validity in non-laboratory settings.
Implementation Method 1
the presence and, in some cases, the concentration, of an analyte on a reagent strip may be determined by measuring the optical reflectance from an area of development on the strip
Implementation Method 2
The sample is carried to the opposite end of the membrane strip by a mobile phase that traverses the membrane strip, for example by capillary action
Data Source
AI summary
Assessing test results development during assay analysis is shown and described. In one embodiment, an apparatus generates an assessment of diagnostic test development from an assay. The apparatus may include an optical detector aligned in an optical path with the assay. Further, the optical detector may perform continuous image detection of the assay to generate an assessment testing development. In some examples, the assessment is a graphical display of diagnostic development. In yet other embodiments, a method of assessing diagnostic test development may include signaling the optical detector to perform continuing image detection of the assay and generating an assessment of said diagnostic test development. The assessment may include graphing a reflectance detected on the assay on a display board.