Sensor platform for noninvasive evaluation of pulmonary oxidative status

Area of Science:

• Electrochemistry
• Nanomaterials Science
• Biomedical Diagnostics

Background:

• Breath analysis is a non-invasive method for disease detection.
• Traditional breath condensate collection dilutes biomarkers.
• Hydrogen peroxide in breath aerosols is a potential health indicator.

Purpose of the Study:

• To develop an advanced sensor platform for analyzing breath aerosols.
• To improve the concentration of breath aerosol samples.
• To detect hydrogen peroxide as a potential biomarker for clinical diagnostics.

Main Methods:

• Development of a cooling-free breath aerosol condenser.
• Fabrication of a nanostructured Prussian Blue based hydrogen peroxide sensor.
• Characterization of sensor performance using conductivity and hydrogen peroxide levels.

Main Results:

• The cooling-free condenser yields samples an order of magnitude more concentrated than traditional methods.
• The nanostructured Prussian Blue sensor reliably detects submicromolar hydrogen peroxide levels.
• Evaluated hydrogen peroxide levels in healthy subjects ranged from 2.2-3.2 μM.

Conclusions:

• The developed sensor platform enhances breath aerosol analysis.
• This technology can non-invasively detect biomarkers, such as for post-COVID-19 syndrome.
• The platform shows promise for future clinical diagnostic applications.