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Researches on a practical system for concentration detection of human exhaled CO2 gas

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DOI: 10.4236/jbise.2009.21004    4,926 Downloads   10,224 Views   Citations


In clinics, especially in the emergency department, carbon dioxide (CO2) is considered as the sixth vital sign in evaluating a patient's medical status. However, its wide applications in developing countries are dissatisfactory due to their high cost compared to their economic growth. In order to develop a practical system for concentration detection of human exhaled CO2 gas for our own, we studied the detection principle based upon the non-dispersive infrared (NDIR) measuring technique and related Lambert-Beer's equation carefully, gave out our functional circuit design of the system, and provided the corresponding graphical user interface (GUI) for CO2 detection. Finally, the experiment shows that it may be a practical system, and will give benefits for the development of our medical care in the future.

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The authors declare no conflicts of interest.

Cite this paper

Yan, R. , Ge, B. and Xie, H. (2009) Researches on a practical system for concentration detection of human exhaled CO2 gas. Journal of Biomedical Science and Engineering, 2, 20-23. doi: 10.4236/jbise.2009.21004.


[1] J. S. Gravenstein, D. A. Paulus, T. J. Hayes (1989) Clinical indi-cations, em: Gravenstein JS, Paulus DA, Hayes TJ-Capnography in clinical practice. Butterworth Publishers, Boston.
[2] M. S. Bhende (1999). Capnography in the pediatric emergency department. Pediatric Emergency Care, 15:64-69.
[3] A. B. Sanders (1989). Capnometry in emergency medicine. An-nals of Emergency Medicine, 18:1287-1290.
[4] R. N. N. Gilboy, R. Michael, C. R. N. A. Hawkins, MS (2006). Noninvasive monitoring of end-tidal carbon dioxide in the emer-gency department. Advanced Emergency Nursing Journal, 28(4): 301 -313.
[5] M. S. Bhende (2001). End-tidal carbon dioxide monitoring in pediatrics: concepts and technology. Journal of Postgraduate Medicine. 47(2): 153-156.
[6] A. B. Sanders, K. B. Kern, C. W. Otto, M. M. Milander and G. A. Ewy (1989). End-tidal carbon dioxide monitoring during cardiopulmonary resuscitation: a prognostic indicator for survival. The Journal of the American Medical Association. 262 (10): 1347-1351.
[7] Carbonate based CO2 sensors with high performance, Th. Lang, H. -D. Wiemhofer and W. Gopel, Conf. Proc. Eurosensors IX, Stockholm (S) (1995); Sensors and Actuators B, 34, 1996, 383-387.
[9] Reliable CO2 sensors based with silicon-based polymers on quartz microbalance transducers, R. Zhou, S. Vaihinger, K. E. Geckeler and W. Gopel, Conf. Proc. Eurosensors VII, Budapest (H) (1993); Sensors and Actuators B, 18-19, 1994, 415-420.
[10] T. Ahrens & C. Sona, (2003). Capnography application in acute and critical care. AACN Clinical Issues, 14 (2), 123-132.
[11] K. Bhavani-Shankar, (2006). Capnography: A comprehensive educational website. Retrieved July 23, 2006.
[12] M. Eichbrecht, (2000, December/2001, January). Capnography: The ventilation vital sign. Retrieved August 2, 2006.
[13] J. D. J. Ingle and S. R. Crouch, Spectrochemical Analysis, Pren-tice Hall, New Jersey.

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