Handheld Breath Analyzer for TB Detection via Laser Fluorescence
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Solution Overview
Problem
Current methods for detecting tuberculosis (TB) are inadequate due to low sensitivity, high cost, requirement for trained personnel and specialized laboratories, and inability to perform point-of-care diagnosis, leading to continued transmission of the disease, especially in resource-limited settings.
Innovation Solution
A portable, hand-held breath analysis device using laser-induced fluorescence to detect TB mycobacterium in exhaled air, which is sensitive, rapid, and easy to use, employing a laser source, detector, and optic system to analyze autofluorescence signals, with accompanying software for data processing and mobile application for results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sputum smear microscopy (SSM) method is used for TB detection, then the detection can be performed broadly in developing nations, but the sensitivity is only about 50% and requires repeat visits
Solution Approach 1:
The patent replaces the manual mechanical sputum smear microscopy method with an automated optical detection system using laser-induced fluorescence. The device automatically analyzes exhaled breath samples for TB mycobacterium, eliminating the need for manual smear preparation and microscopy while achieving over 90% sensitivity in a single visit.
Solution Approach 2:
The patent changes the detection parameter from visual microscopy of smears to laser-induced fluorescence detection of mycobacterial components in exhaled breath. This parameter change enables rapid, automated detection with high sensitivity while maintaining ease of use in resource-limited settings.
2Measurement precision
If culture approach is used for TB detection, then the sensitivity reaches 95% and drug resistant variants can be identified, but it requires well-trained personnel, special laboratories, and takes up to 6 weeks
Solution Approach 1:
The patent extracts the detection function from complex laboratory culture systems and concentrates it into a portable handheld device. The device performs fluorescence detection of TB mycobacterium directly from exhaled breath, eliminating the need for special laboratories, trained personnel, and lengthy culture processes while maintaining high sensitivity.
Solution Approach 2:
The patent replaces the complex biological culture system with an optical fluorescence detection system. This substitution eliminates the need for incubators, specialized media, and trained personnel while providing rapid results in under an hour with sensitivity comparable to or exceeding culture methods.
3Speed
If molecular detection methods like GeneXpert are used, then rapid detection can be achieved, but the cost is high and they are difficult to use in real world applications
Solution Approach 1:
The patent employs disposable filters and simple consumables instead of expensive molecular reagents and cartridges. The device uses affordable components like lasers, filters, and detectors to achieve rapid detection at a fraction of the cost of molecular methods, making it suitable for widespread real-world deployment.
Solution Approach 2:
The patent replaces complex molecular amplification systems with a simpler optical fluorescence detection system. This substitution maintains rapid detection capability while dramatically reducing cost and operational complexity, enabling easy use in diverse real-world settings including resource-limited areas.
4Productivity
If TB detection is delayed, then transmission risks continue to increase as untreated individuals can infect 10-15 people per year, but rapid detection methods are either costly or require specialized equipment
Solution Approach 1:
The patent creates a universal handheld device that can detect TB mycobacterium in exhaled breath without requiring specialized laboratories or equipment. The device is designed for broad applicability in various settings from clinics to community health centers, enabling rapid detection and transmission prevention across diverse environments.
Solution Approach 2:
The patent changes the detection approach to analyze fluorescence signals from exhaled breath rather than requiring specialized laboratory equipment. This parameter change enables rapid detection within minutes while using simple, portable components that can be deployed universally without specialized infrastructure.
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 instant, reliable, and sensitive detection of active TB carriers, reducing transmission risks and suitable for use in resource-limited settings without the need for specialized equipment or trained personnel, providing a cost-effective point-of-care solution.
Implementation Method 1
A portable, hand-held breath analysis device using laser-induced fluorescence to detect TB mycobacterium in exhaled air
Implementation Method 2
employing a laser source, detector, and optic system to analyze autofluorescence signals
Data Source
AI summary
A device, method, and system for the rapid detection of the tuberculosis mycobacterium dispersed in air is provided which employ a breath analysis device consisting of a replaceable mouthpiece unit, a laser module, an optical system, and a detection unit capable of detecting autofluorescence generated by the tuberculosis mycobacterium when irradiated by the laser, a software capable of analyzing and characterizing the acquired autofluorescence signal and distinguishing the spectrum due to tuberculosis mycobacteria from spectra generated by other bacteria and providing to the user of the breath analysis device an analysis and report on the results of the breath analysis test.