A personal device for analyzing carbon dioxide in real time and real breath: experimental investigation and computational simulation

Authors
Zhao, Di; Miller, Dylan; Shao, Dangdang; Xian, Xiaojun; Tsow, Francis; Iglesias, Rodrigo Alejandro; Forzani, Erica S.
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
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.
Fil: Zhao, Di. Arizona State University; Estados Unidos
Fil: Miller, Dylan. Arizona State University; Estados Unidos
Fil: Shao, Dangdang. Arizona State University; Estados Unidos
Fil: Xian, Xiaojun. Arizona State University; Estados Unidos
Fil: Tsow, Francis. Arizona State University; Estados Unidos
Fil: Iglesias, Rodrigo Alejandro. Arizona State University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Forzani, Erica S.. Arizona State University; Estados Unidos
Subject
BREATH ANALYSIS
COLORIMETRIC SENSOR
MASS TRANSPORT
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/25190