Binary WO3 Sensor Array for Breath Biomarker Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Breath analysis faces challenges in detecting and discriminating signaling metabolites, such as disease markers, in exhaled breath at low concentrations, requiring a specific and high affinity between the sensing element and biomarkers like nitric oxide (NO) and isoprene, especially in high-altitude and high-G environments.
Innovation Solution
A binary 2-sensor array system using γ-WO3 and h-WO3 metal oxide sensors, integrated into a breath gas sensing system, continuously monitors NO and isoprene concentrations in exhaled breath, providing reproducible results and enabling adjustments to oxygen flow for pilots and critical care patients to prevent hypoxia-like episodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional breath analysis methods are used, then general biomarker detection is possible, but detection precision for low-concentration signaling metabolites is insufficient
Solution Approach 1:
The sensing system is segmented into multiple specialized sensors, each designed to detect specific biomarkers (nitric oxide, isoprene, acetone) at different concentration levels. This segmentation allows each sensor to be optimized for its target analyte, achieving high detection precision for low-concentration signaling metabolites without requiring a single complex universal sensor.
Solution Approach 2:
The patent employs composite sensing materials with different selectivity characteristics to detect multiple biomarkers simultaneously. By combining materials with complementary properties, the system achieves high measurement precision for trace metabolites while maintaining a manageable device structure through material-level complexity rather than system-level complexity.
2Adaptability or versatility
If multiple biomarkers are detected simultaneously, then comprehensive physiological monitoring is achieved, but device complexity increases
Solution Approach 1:
The sensing system is designed with multi-functionality to detect multiple biomarkers (nitric oxide, isoprene, acetone, and other VOCs) using a integrated array of sensors. Each sensor type targets specific biomarkers, but the overall system provides comprehensive physiological monitoring capability, achieving versatility through functional integration rather than mechanical complexity.
3Productivity
If real-time continuous monitoring is implemented, then rapid detection of physiological episodes is possible, but response time requirements increase system demands
Solution Approach 1:
The system implements continuous real-time monitoring of breath biomarkers through an always-active sensor array that continuously analyzes exhaled breath. This continuous operation enables rapid detection of physiological episodes and metabolic changes, maintaining high productivity while ensuring reliability through uninterrupted data collection and immediate alert capabilities when threshold violations occur.
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 effectively measures NO and isoprene levels in exhaled breath, providing real-time data for lung function and metabolic changes, enabling early prediction of physiological episodes and aiding in preventing hypoxia, with response times of 15 seconds and measurement intervals of three minutes or less.
Implementation Method 1
contacting the exhaled breath with a surface of γ-WO3 inside the breath processing unit which responds to nitric oxide, and a surface of h-WO3 inside the breath processing unit which responds to isoprene, to alter an electrical property of the γ-WO3 surface and the h-WO3 surface
Data Source
AI summary
An apparatus for measuring levels of specific biomarkers in exhaled breath. Specific compounds such as nitric oxide and isoprene can be monitored from a subject's breath. The resultant measurements can provide indications of the subject's medical condition, or response to an applied stress.