Exhaled Breath Temperature Measurement in Pediatric Respiratory Health
Summary
Measurement of exhaled breath temperature (EBT) offers a non-invasive window into airway physiology and inflammation in children. As air flows over inflamed or vascularised bronchial mucosa, its temperature rises, reflecting changes in mucosal blood flow and inflammatory activity. Modern sensors can detect minute temperature fluctuations during exhalation, providing real-time data without discomfort or radiation exposure. In paediatric practice, EBT measurement holds promise for early detection of airway inflammation in asthma, viral bronchiolitis and other conditions characterised by mucosal hyperaemia. The technique is simple, repeatable and suitable for serial monitoring, facilitating assessment of disease severity, therapeutic response and environmental triggers. Global interest has spurred development of portable, low-cost devices tailored to children’s breathing patterns and cooperation levels. Yet challenges remain, including standardisation of measurement protocols, control of ambient and host factors, calibration of sensors for paediatric flow rates, and interpretation of normal ranges across age groups. Integration of EBT monitoring into clinical pathways could complement established biomarkers—such as exhaled nitric oxide—to refine diagnosis, personalise treatment and reduce reliance on invasive tests. As research advances sensor technology and delineates confounders, EBT measurement is poised to become a practical tool in paediatric respiratory care worldwide.
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Exhaled Breath Temperature Measurement in Pediatric Respiratory Health publication trend
The graph below shows the total number of articles in exhaled breath temperature measurement in pediatric respiratory health across all publications each year (not limited to Nature Index journals).
Technical terms
Exhaled Breath Temperature (EBT): The temperature of air as it exits the respiratory tract, indicative of airway mucosal perfusion and inflammation.
Airway Inflammation: A pathological process involving immune cells and mediators in bronchial mucosa, leading to swelling, increased blood flow and altered gas exchange.
Bronchial Blood Flow: The volume of blood circulating through airway mucosa per unit time, which rises in inflammatory states and influences exhaled air temperature.
Thermistor Sensor: A temperature-sensitive resistor used in breath-analysis devices to detect rapid temperature changes during exhalation with high sensitivity.
References
- Correlation of exhaled breath temperature with bronchial blood flow in asthma. Respiratory Research (2005).
- Fabrication of prototype for measuring the exhaled breath temperature (EBT) to support detection of asthma. Journal of Physics Conference Series (2017).
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