Handheld Breath Biomarker Detection System
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Solution Overview
Problem
Current methods for detecting tetrahydrocannabinol (THC) in breath samples face challenges due to its low prevalence and the need for accurate, portable, and non-invasive measurement systems, especially for roadside sobriety testing, as THC can remain present in the body long after use, leading to potential false positives in blood or urine tests.
Innovation Solution
The development of immunoassay-based detection systems and methods that utilize a handheld device to capture and analyze THC from breath samples, with a microfluidic device and immunoassays such as surface-based antibody-down immunoassays, allowing for picogram-level sensitivity and correlation with THC-associated impairment, enabling reliable roadside detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If immunoassay-based detection systems are used to detect THC in breath samples, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a hierarchical detection architecture where a handheld device provides preliminary screening and the laboratory immunoassay system provides confirmatory analysis. The handheld device contains embedded algorithms that pre-process breath samples and identify candidates for laboratory analysis, nesting the simpler device within the more complex laboratory system to optimize resource utilization while maintaining high measurement precision.
Solution Approach 2:
The detection system is divided into distinct functional modules: breath collection module, pre-processing module with embedded algorithms, laboratory immunoassay module, and data analysis module. This segmentation allows each component to be optimized independently, reducing overall system complexity while maintaining high THC detection sensitivity through specialized function in each segment.
2Ease of operation
If portable handheld devices are used for roadside THC detection, then ease of operation is improved, but measurement precision deteriorates due to low THC prevalence in breath
Solution Approach 1:
The handheld device performs preliminary breath collection and pre-processing actions at the roadside, preparing samples and identifying potential THC presence before laboratory analysis. This preliminary action enables rapid screening with high ease of operation, while the subsequent laboratory immunoassay provides the confirmatory precision needed to overcome the low THC prevalence in breath samples.
Solution Approach 2:
The system introduces an intermediary data transmission and processing layer between the handheld device and laboratory analysis. Embedded algorithms in the handheld device pre-analyze breath samples and transmit only relevant data to the laboratory system, maintaining measurement precision while preserving the ease of operation of portable devices by reducing the complexity of real-time analysis at the roadside.
3Ease of operation
If breath testing is used instead of blood or urine testing, then ease of operation is improved through non-invasiveness, but reliability deteriorates due to false positives from THC remaining in the body long after use
Solution Approach 1:
The system implements a feedback mechanism where the handheld device provides initial breath test results, and based on predetermined criteria, triggers laboratory immunoassay analysis for confirmation. This feedback loop allows the non-invasive breath testing to proceed for routine cases while automatically initiating more reliable laboratory analysis when impairment is suspected, thereby maintaining ease of operation while improving reliability through conditional confirmatory testing.
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 enhanced sensitivity and scalability for THC detection, allowing for accurate determination of recent THC use independent of usage frequency, facilitating reliable roadside testing and potential combination with alcohol detection, while also being adaptable for other airborne substances and disease indicators.
Implementation Method 1
immunoassay-based detection systems and methods that utilize a handheld device to capture and analyze THC from breath samples, with a microfluidic device and immunoassays such as surface-based antibody-down immunoassays
Implementation Method 2
surface-based antibody-down immunoassays
Data Source
AI summary
Methods, systems and techniques for the accurate measurement breath-borne biomarkers are disclosed. Such methods, systems and techniques may be used for the purposes of detection and/or measurement in breath samples of biomarkers.