Human breath analysis; Clinical application and measurement: An overview

Area of Science:

• Nanotechnology
• Chemical Sensing
• Biomedical Engineering

Background:

• Human breath contains volatile organic compounds (VOCs) indicative of various diseases.
• Traditional VOC detection methods (GC/MS, HPLC) are costly, non-portable, and require expert operation.
• Portable gas sensors offer advantages like cost-effectiveness, speed, and patient comfort.

Purpose of the Study:

• To review advancements in nanotechnology-based solid-state gas sensors for human breath analysis.
• To highlight the evolution of VOC gas sensors for clinical applications.
• To discuss challenges and future prospects of breath monitoring technologies.

Main Methods:

• Review of recent literature on nanotechnology and solid-state materials for VOC gas sensing.
• Analysis of sensor performance metrics such as sensitivity and selectivity.
• Discussion of clinical application requirements for breath analysis devices.

Main Results:

• Nanotechnology has significantly improved the sensitivity and selectivity of VOC gas sensors.
• Miniaturized, solid-state sensors are emerging for clinical breath monitoring.
• Challenges in repeatability, accuracy, and device-body proximity persist.

Conclusions:

• Nanotechnology is crucial for developing advanced gas sensors for breath analysis.
• Further research is needed to overcome limitations for widespread clinical adoption.
• Optimized gas sensors hold promise for non-invasive disease diagnosis and monitoring.