Title :
pCO2, pO2, and pH monitoring using micro-flow colorimetry
Author :
Cooney, Christopher ; Towe, Bruce
Author_Institution :
Bioeng. Program, Arizona State Univ., Tempe, AZ, USA
Abstract :
pCO2, pO2 and pH levels are optically monitored using continuous micro-flow of colorimetric indicators through hollow fiber membranes in contact with blood. Optical monitoring is achieved using LEDs and photodetectors coupled to outlet micro-bore capillary tubes. Three separate hollow fiber membranes are selected based on membrane permeability to the measurand. The sensors are exposed to blood in an extracorporeal loop using continuous flow or blood withdrawal-reinfusion
Keywords :
bio-optics; biochemistry; colorimetry; fluorescence; haemodynamics; membranes; microfluidics; oximetry; pH measurement; patient monitoring; peristaltic flow; LEDs; blood contact; blood gas monitor; blood withdrawal-reinfusion; colorimetric indicators; continuous micro-flow; extracorporeal loop; hollow fiber membranes; membrane permeability; micro-flow colorimetry; optical monitoring; outlet micro-bore capillary tubes; pCO2 monitoring; pH monitoring; pO2 monitoring; peristaltic pump; photodetectors; Biomembranes; Fluorescence; Light emitting diodes; Monitoring; Optical buffering; Optical fiber sensors; Photodetectors; Pumps; Reservoirs; Testing;
Conference_Titel :
Bioengineering Conference, 1999. Proceedings of the IEEE 25th Annual Northeast
Conference_Location :
West Hartford, CT
Print_ISBN :
0-7803-5486-9
DOI :
10.1109/NEBC.1999.755794
