Studies of blood gas determination and intelligent image

Chih-Cheng Wang; Xiaogang Jin

doi:10.1117/12.58295

16 April 1992 Studies of blood gas determination and intelligent image

Chih-Cheng Wang, Xiaogang Jin

Proceedings Volume 1648, Fiber Optic Medical and Fluorescent Sensors and Applications; (1992) https://doi.org/10.1117/12.58295
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

In recent years, progress has been made in understanding the theory of laser absorption and emission. In addition, advancements of electronic components and fiber optics permitted construction of useful medical instruments. Such a fiber optic sensor (FOS) has been developed at the authors' institution. The technique is a method of major importance in the areas of geochemistry, biomedical engineering, and blood gas analysis. According to the type of variable to be measured, two wide classes can be defined; Biomedical (for oxygen saturation, pH, pO₂, and pCO₂ measurement) and physical (for pressure, temperature, and blood velocity). In general, biomedical sensors use an appropriate reversible reagent fixed at a fiber end, allowing spectrophotometric or fluorimetric analysis by modulation. Sensors for measuring blood velocity and flow are mainly applied in the cardiovascular clinic and in pathophysiology. Velocity in vessels can be measured using the laser Doppler method based on the frequency shift of light scattered by the moving red cells (erythrocytes, diameter 7/micrometers ). The Doppler-shifted backscattered light is partially collected by the same fiber tip end transmitted back to its entrance. There was shown to be a highly sensitive and linear relationship between the results obtained with this method and the blood gas analyzer.

Citation Download Citation

Chih-Cheng Wang and Xiaogang Jin "Studies of blood gas determination and intelligent image", Proc. SPIE 1648, Fiber Optic Medical and Fluorescent Sensors and Applications, (16 April 1992); https://doi.org/10.1117/12.58295

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