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Optics Letters

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  • Vol. 27, Iss. 2 — Jan. 15, 2002
  • pp: 107–109

Simultaneous NO and CO2 measurement in human breath with a single IV-VI mid-infrared laser

C. Roller, K. Namjou, J. Jeffers, W. Potter, P. J. McCann, and J. Grego  »View Author Affiliations


Optics Letters, Vol. 27, Issue 2, pp. 107-109 (2002)
http://dx.doi.org/10.1364/OL.27.000107


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Abstract

A tunable diode laser absorption spectroscopy (TDLAS) system equipped with a IV–VI mid-IR laser operating near 5.2>mu;m was used to measure exhaled nitric oxide (eNO) and carbon dioxide (CO2) simultaneously in human breath over a single exhalation. Breath was sampled in real time, and eNO levels were measured from seven volunteers, two steroid-naive asthmatics and five nonasthmatics. Measured CO2 levels were used as an internal standard to verify correct breath collection and calculate eNO values. Calculated eNO concentrations agreed well with reported values for asthmatic and nonasthmatic individuals.

© 2002 Optical Society of America

OCIS Codes
(000.1430) General : Biology and medicine
(140.5960) Lasers and laser optics : Semiconductor lasers
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared

Citation
C. Roller, K. Namjou, J. Jeffers, W. Potter, P. J. McCann, and J. Grego, "Simultaneous NO and CO2 measurement in human breath with a single IV-VI mid-infrared laser," Opt. Lett. 27, 107-109 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-2-107


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