Optoelectronic Reader for Multifactor Lateral Flow Assays
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Solution Overview
Problem
Current lateral flow assay systems are limited by their inability to provide quantitative measurements, leading to interpretation errors and requiring significant computing resources for multifactor assays.
Innovation Solution
A diagnostic test system comprising optical detectors and a logic circuit that evaluates detection signals from multiple views of a test strip to generate output logic signals corresponding to logical combinations, enabling rapid and low-cost multifactor assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection of lateral flow assay test strips is used, then qualitative assay results can be obtained, but quantitative measurements are not provided and interpretation errors occur
Solution Approach 1:
The patent replaces manual visual inspection with an automated optoelectronic reading system that uses optical detectors to quantitatively measure light signals from the test strip. This substitution of mechanical/visual methods with optical detection systems enables precise quantitative measurements and eliminates interpretation errors associated with manual reading.
2Measurement precision
If automated optoelectronic reading systems are used for multifactor assays, then quantitative measurements are provided, but significant computing resources are required
Solution Approach 1:
The patent divides the multifactor assay into separate test regions on the test strip, each dedicated to detecting a specific analyte. This spatial segmentation allows multiple assays to be performed simultaneously on a single strip, reducing the computational burden compared to sequential analysis and enabling parallel processing of multiple detection signals.
Solution Approach 2:
The patent transitions from single-factor to multifactor assays by adding spatial dimensionality through multiple test regions on the same strip. This dimensional expansion allows simultaneous detection of multiple analytes without proportionally increasing computational complexity, as all detections occur in parallel rather than requiring sequential processing.
3Adaptability or versatility
If multiple test regions with different capture reagents are included on a single test strip, then multifactor assays can be performed, but device complexity increases
Solution Approach 1:
The patent creates a universal test strip platform that can perform multiple different assays simultaneously through the inclusion of multiple test regions with different capture reagents. This multi-functional design allows a single strip to serve multiple diagnostic purposes, increasing versatility without requiring separate devices for each assay type.
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
Enables rapid, low-cost multifactor assays by evaluating logical relationships among detection results on a single test strip, improving accuracy and reducing computational requirements.
Implementation Method 1
Capillary action draws the liquid sample 24 downstream into the labeling zone 14
Implementation Method 2
Each of the optical detectors 44 has a corresponding view in the receptacle 68 and produces an electrical signal 48 at a respective detector output in response to light from the corresponding view
Data Source
AI summary
In one aspect, a diagnostic test system includes a receptacle, optical detectors, and a logic circuit. Each of the optical detectors has a corresponding view in the receptacle and produces an electrical signal at a respective detector output in response to light from the corresponding view. The logic circuit includes logic inputs that are respectively coupled to the detector outputs and that produce an output logic signal corresponding to a logical combination of signals received at the logic inputs. In another aspect, respective detection signals are produced in response to light received from respective ones of multiple views of the test strip, and at least one output logic signal corresponding to a respective logical combination of the detection signals is generated.