Measurement of temperature and relative humidity in exhaled breath

  title={Measurement of temperature and relative humidity in exhaled breath},
  author={Elias Mansour and Rotem Vishinkin and St{\'e}phane Rihet and Walaa Saliba and Falk Fish and Patrice D. Sarfati and Hossam Haick},
  journal={Sensors and Actuators B-chemical},
Statistical Evaluation of Total Expiratory Breath Samples Collected throughout a Year: Reproducibility and Applicability toward Olfactory Sensor-Based Breath Diagnostics
A robust protocol for the breath analysis, focusing on total expiratory breath measured by a Membrane-type Surface stress Sensor (MSS), which possesses practical characteristics for artificial olfactory systems, is reported.
Review of the algorithms used in exhaled breath analysis for the detection of diabetes
This paper summarizes the results using various measurement systems, feature extraction and feature selection methods as well as algorithms such as support vector machines, k-nearest neighbours and various variations of neural networks for the detection of diabetes in patient samples and simulated artificial breath samples.
A Low-Cost Breath Analyzer Module in Domiciliary Non-Invasive Mechanical Ventilation for Remote COPD Patient Monitoring †
This work is a proof-of-concept of a sensors-based IoT system with the perspective to check continuously the effectiveness of therapy and/or any state of exacerbation of the disease requiring healthcare.
A new and simple parameter for diagnosis pulmonary edema: Expiratory air humidity.
Inhaled CO2 concentration while wearing face masks: a pilot study using capnography.
The current guidelines on mask-wearing could be updated to integrate recommendations for slow breathing and a more targeted use when contagion risk is low, if these results will be confirmed.


Measurement of exhaled breath temperature in science and clinical practice
Evaluation of the exhaled breath temperature (EBT) has been suggested as a new method to detect and monitor pathological processes in the respiratory system and has emerged as an attractive noninvasive new approach in respiratory and, possibly, other diseases.
Development of a Breath Analyzer for O2 and CO2 Measurement
Breath analysis can be used to screen disease and detect physical conditions. Many research studies have investigated various sensors or techniques that were used to detect gas concentrations and
Exhaled breath temperature in patients with stable and exacerbated COPD.
The peak exhaled breath temperature, recorded during multiple tidal breaths, increases with an acute exacerbation of COPD, and may be related to accelerated airway inflammation.
Validation of a novel respiratory rate monitor based on exhaled humidity.
The respiR8(®) monitor gives an accurate measurement of RR and is useful in postoperative care and compared with two other methods of measuring RR: capnometry and counting of thoracic breathing movements.
The relationship of normal body temperature, end-expired breath temperature, and BAC/BrAC ratio in 98 physically fit human test subjects.
Neither normal body temperature nor end-expired breath temperature was strongly associated with BAC/BrAC ratio, whereas the correlations between body temperature and end- Expiration breath temperature, body temperature, and Bac/Brac ratio, and breath temperature and BAC / BrAC ratio were much lower.
Faster rise of exhaled breath temperature in asthma: a novel marker of airway inflammation?
Asthmatic subjects have elevated Deltae degrees T, which may represent a novel, noninvasive means of measuring airway blood flow and inflammation in asthma.
Importance of Temperature and Humidity in the Measurement of Pulmonary Oxygen Uptake per Breath During Anesthesia
  • P. Breen
  • Materials Science
    Annals of Biomedical Engineering
  • 2004
Because inspired RH and T can vary significantly during anesthesia, a fast-response humidity and T sensor, combined with flow and FIO2 measurements, are needed to allow accurate determination of VO2,br, which should become an important measure of metabolism and patient wellness during anesthesia.
Slower rise of exhaled breath temperature in chronic obstructive pulmonary disease
Exhaled temperature increase is reduced in chronic obstructive pulmonary disease patients and is increased by the inhalation of vasodilators and therefore may be related to changes of bronchial blood flow and tissue remodelling.
Online sample conditioning for portable breath analyzers.
A miniaturized mouthpiece was developed for personal breath analyzers to condition the humidity in real breath samples without changing the analyte concentrations and introducing substantial backpressure, which is achieved with optimized packing of desiccant particles.