Electronic Diagnostic Device Light Shield Fluid Channeling
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Solution Overview
Problem
Existing diagnostic devices for detecting analytes in body fluids lack sufficient accuracy and sensitivity, particularly in detecting low levels of substances like hCG for pregnancy testing, and often require manual interpretation of visually observable indicia, which can lead to false positives and require improved sensitivity and rapid detection methods.
Innovation Solution
An electronic diagnostic device with a casing, test strip, processor, and sensors that activates upon exposure to ambient light, performs self-diagnostic tests, and uses a light source and sensors to compare signal readings to determine analyte presence, providing a positive or negative result message based on predetermined thresholds and time periods, while minimizing fluid channeling through a light shield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If visual observation methods are used for analyte detection, then device complexity is reduced, but measurement precision and reliability deteriorate due to false positives and low sensitivity
Solution Approach 1:
The patent replaces visual observation with electronic detection systems including light sources, photodetectors, and signal processing circuits. The test strip incorporates electronic components that automatically detect and quantify analyte presence, substituting manual visual assessment with automated optical measurement to eliminate false positives and improve precision
Solution Approach 2:
The patent introduces an intermediary electronic detection system between the analyte and the user. Instead of direct visual observation, the system uses light interaction with the test strip and electronic signal processing to generate objective results, acting as a mediator that transforms chemical interactions into quantifiable electronic signals
2Device complexity
If manual interpretation of test results is required, then device complexity is reduced, but loss of information increases due to subjective interpretation errors
Solution Approach 1:
The patent implements feedback mechanisms where the electronic detection system automatically processes test results and provides immediate objective output. The system incorporates signal processing feedback loops that continuously monitor and adjust measurements, eliminating subjective interpretation and preserving complete information through automated digital readout
Solution Approach 2:
The test device performs self-interpretation of results through integrated electronic components. The system automatically detects analyte presence, processes signals, and generates results without requiring user interpretation, enabling the device to serve itself in eliminating information loss from subjective assessment
3Measurement precision
If sensitivity is increased to detect low levels of analytes, then measurement precision is improved, but false positives increase and reliability deteriorates
Solution Approach 1:
The patent employs partial action by implementing multiple detection thresholds and confirmation criteria. Instead of relying on a single sensitive detection point that may produce false positives, the system uses graduated detection levels with confirmation steps, applying excessive action through redundant verification mechanisms to ensure reliability while maintaining precision
4Measurement precision
If automated detection systems are implemented, then measurement precision and reliability are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into integrated components. The test strip combines reagent layers, flow control structures, and electronic detection elements into a single unified device. The housing integrates sample application area, test strip mounting, light source, photodetector, and display into one compact unit, reducing overall system complexity while maintaining high measurement precision through functional integration
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 enhances accuracy and sensitivity for detecting analytes in body fluids, allowing for reliable self-diagnosis of pregnancy and other conditions with high precision and speed, reducing the risk of false positives and improving user experience through automated and rapid results.
Implementation Method 1
capillary action, wicking, or simple wetting
Implementation Method 2
A light source and sensors are provided in the device. The sensors are configured to provide a signal to the controller when the sensors detect ambient light
Data Source
AI summary
An improved electronic diagnostic device for detecting the presence of an analyte in a fluid sample comprises a casing having a display, a test strip mounted in the casing, a processor mounted in the casing, and a first sensor mounted in the casing and operatively coupled to the processor. The processor is configured to receive a signal from the first sensor when the device is exposed to ambient light thereby causing the device to become activated. The device includes a light shield that exerts pressure across a width of the test strip to prevent fluid channeling along the length of the test strip. The processor is configured to present an early positive test result reading when a measured value exceeds a predetermined early reading threshold value at any time after a predetermined early testing time period.