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Development of a medical fiber-optic oxygen sensor based on optical absorption change

1992; Institute of Electrical and Electronics Engineers; Volume: 39; Issue: 2 Linguagem: Inglês

10.1109/10.121650

1558-2531

Roger A. Wolthuis, David A. McCrae, James C. Hartl, E. W. Saaski, Gordon L. Mitchell, Kathi C. Garcin, Robert J. Willard,

Analytical Chemistry and Sensors

A new fiber-optic oxygen sensor has been developed for use in medical applications. The sensor's viologen indicator becomes strongly absorbent after brief UV stimulation, and then returns to the transparent state. The rate of indicator return to transparency is proportional to the local oxygen concentration. Indicator absorbance is monitored with a red LED and receiving photodiode, and absorbance data are processed by a dedicated cpu. The solid-state sensor system has performance comparable to existing oxygen measurement techniques, and may be applicable for both in vitro and in vivo oxygen measurements.