Electronic nose in discrimination of children with uncontrolled asthma

Area of Science:

• Biomarkers and diagnostics
• Respiratory medicine
• Volatile organic compound analysis

Background:

• Monitoring airway inflammation in asthma is crucial for effective management.
• Exhaled breath analysis offers a non-invasive method for detecting biomarkers.
• Electronic nose (e-Nose) technology shows potential for identifying volatile organic compounds (VOCs) in breath.

Purpose of the Study:

• To compare e-Nose respiratory patterns in a pediatric cohort with different asthma control levels.
• To assess the ability of e-Nose technology to discriminate between controlled and uncontrolled asthma in children.
• To evaluate exhaled breath volatile organic compound (VOC) profiles for asthma diagnosis.

Main Methods:

• A cross-sectional study involving 38 children (28 with asthma, 10 healthy controls).
• Asthma control was classified using Global Initiative for Asthma (GINA) guidelines: controlled (AC), partially controlled (APC), and uncontrolled (ANC).
• Exhaled breath samples were collected using a commercial e-Nose (Cyranose 320) for VOC profile generation; spirometry and clinical exams were also performed.

Main Results:

• The e-Nose successfully discriminated between healthy/controlled asthma and uncontrolled/partially controlled asthma groups (AUC=0.85).
• Cross-validated AUC was 0.80, with a sensitivity of 0.79 and specificity of 0.84.
• Exhaled biomarker patterns were easily obtained and differentiated children with uncontrolled asthma from asymptomatic controls.

Conclusions:

• Electronic nose technology is a feasible and effective tool for analyzing exhaled breath biomarkers in children.
• e-Nose analysis of VOCs can differentiate children with uncontrolled asthma from those with controlled asthma or healthy controls.
• This non-invasive approach holds potential for routine monitoring of asthma control in pediatric populations.