Artículos de revistas
A personal device for analyzing carbon dioxide in real time and real breath: experimental investigation and computational simulation
Fecha
2013-04Registro en:
Zhao, Di; Miller, Dylan; Shao, Dangdang; Xian, Xiaojun; Tsow, Francis; et al.; A personal device for analyzing carbon dioxide in real time and real breath:
experimental investigation and computational simulation; Elsevier Science; Sensors and Actuators B: Chemical; 183; 4-2013; 627-635
0925-4005
CONICET Digital
CONICET
Autor
Zhao, Di
Miller, Dylan
Shao, Dangdang
Xian, Xiaojun
Tsow, Francis
Iglesias, Rodrigo Alejandro
Forzani, Erica S.
Resumen
The analysis of breath CO2 provides valuable information of pulmonary and cardiovascular functions, and plays a crucial role in monitoring patients with respiratory problems. Developing portable sensors for real breath CO2 analysis has been challenging because exhaled breath is hot, humid and turbulent. In this work, we have developed, modeled and tested a portable CO2 sensor that can analyze end tidal CO2 concentration in breath and in real time accurately. The key components of the sensor comprise a fluidic system for efficient breath sample delivery and a colorimetric detection integrated into the fluidic system. The modeling includes turbulent mass transport, heat transfer from the samples at body temperature to the device environment, and chemical reaction mechanisms, including multiple reactions pathways and diffusion of CO2 in the sensing layer. Furthermore, the sensor has been tested and compared with a standard commercial CO2 analyzer, and the results are in good agreement with those of the commercial analyzer, and with the modeling.