Handheld Hemoglobin Detector Optical Assembly
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Solution Overview
Problem
Current stool occult blood tests for colorectal cancer are inconvenient, often requiring samples to be sent to hospitals, leading to long waiting times and potential misdiagnosis due to pseudo-negative results from non-uniform blood distribution and intermittent bleeding, and existing remote detection methods involve complex procedures with chemicals that are not user-friendly for home use.
Innovation Solution
A handheld hemoglobin detecting device with a housing assembly, control module, and lighting assembly that includes a micro-controller, light sensor, and light emitting module, allowing for easy assembly and operation by users to detect hemoglobin in stool or urine samples without the need for additional chemicals, using a light guide and concentrator to focus light on the sample for accurate spectral analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional immunochemical fecal occult blood test (i-FOBT) is used, then the test can be performed in hospital, but it requires long waiting time and inconvenient sample delivery process
Solution Approach 1:
The patent enables users to perform hemoglobin detection themselves at home using a handheld device with integrated light sources, sensors, and processing capabilities. The device allows self-service testing without requiring hospital visits or sample delivery, thereby eliminating waiting time while maintaining detection accuracy through built-in spectral analysis capabilities.
Solution Approach 2:
The patent replaces the traditional chemical-based i-FOBT method with a photometric detection system using light sources and sensors. This substitution enables rapid real-time detection without chemical reaction waiting periods, significantly reducing measurement time while maintaining or improving detection accuracy through optical spectral analysis.
2Ease of operation
If traditional i-FOBT sample collection method is used, then the test can be performed, but blood tissue not uniformly distributed in stool leads to pseudo-negative results
Solution Approach 1:
The patent uses optical spectral copying of the sample's light absorption characteristics to detect hemoglobin. Instead of relying on physical sample representation, the system creates an optical signature of the sample that can be analyzed for hemoglobin content, eliminating the problem of non-uniform blood distribution in stool samples.
Solution Approach 2:
The patent transforms the detection parameter from visual or chemical analysis to spectral analysis across multiple wavelengths. By measuring light absorption at different wavelengths characteristic of hemoglobin, the system can detect even small amounts of hemoglobin regardless of sample uniformity, significantly improving detection accuracy.
3Ease of operation
If fluorescent agent or oxidant is added into toilet bowl for remote detection, then hemoglobin can be detected remotely, but the procedure becomes complex and requires chemical preparation
Solution Approach 1:
The patent extracts the chemical reagents (fluorescent agents and oxidants) from the detection system and replaces them with optical components. The handheld device uses integrated light sources and sensors to directly analyze the sample, eliminating the need for chemical preparation while maintaining detection capability and simplifying the procedure for users.
4Measurement precision
If strong reducing agents are used in reaction solution, then hemoglobin detection can be achieved, but the agents may cause burn when in contact with skin
Solution Approach 1:
The patent replaces chemical-based detection methods using strong reducing agents with an optical detection system. The handheld device uses light sources and photodetectors to measure hemoglobin through spectral analysis, eliminating the need for hazardous chemicals while maintaining detection precision and removing skin burn risks.
5Measurement precision
If sample collection and dilution process is used, then hemoglobin test can be performed, but extra cleaning processes are required after testing
Solution Approach 1:
The patent enables complete self-service testing with the handheld device that requires no sample collection, dilution, or cleaning procedures. Users simply place the device directly on the sample, and the integrated system performs detection and automatic cleanup, eliminating all manual cleaning steps while maintaining detection accuracy.
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 provides a convenient, user-friendly method for detecting hemoglobin, reducing waiting times and improving accuracy by allowing for immediate testing at home, with a simplified structure and low manufacturing costs, while minimizing the risk of misdiagnosis through direct spectral analysis of the sample.
Implementation Method 1
The lighting assembly is mounted in the tubular housing and includes a light emitting module, a light concentrator, and a light guide. The light emitting module is electrically connected to the micro-controller and has at least one light source. At least one light beam emitted from the at least one light source passes through and is concentrated by the light concentrator to shine on the liquid holder.
Implementation Method 2
The control module is disposed on the housing assembly and includes a micro-controller, a switch electrically connected to the micro-controller and alternatively switching the micro-controller on or off, a light sensor electrically connected to the micro-controller, and a display interface electrically connected to the micro-controller.
Data Source
AI summary
A handheld hemoglobin detecting device has a housing assembly including a holding base, a tubular housing and a liquid holder, a control module disposed on the housing assembly, and a lighting assembly mounted in the tubular housing and including a light emitting module, a light concentrator, and a light guide. At least one light beam emitted from the light emitting module passes through and is concentrated by the light concentrator to shine on the liquid holder, is reflected by a light reflector that is disposed in the liquid holder, enters the light guide, and is transmitted to a light sensor. The handheld hemoglobin detecting device has a simplified structure and is easy to assemble, and thus is light and has low manufacturing cost. Moreover, a lower accuracy in assembling the lighting assembly can be tolerated.