Optical pH, oxygen and carbon dioxide monitoring using a microdialysis approach

被引:38
作者
Cooney, CG [1 ]
Towe, BC [1 ]
Eyster, CR [1 ]
机构
[1] Arizona State Univ, Dept Chem Bio & Mat Engn, Bioengn Program, Coll Engn, Tempe, AZ 85287 USA
基金
美国国家航空航天局;
关键词
absorbance; blood gas; fluorescence; microdialysis; micro-flow and optical monitoring;
D O I
10.1016/S0925-4005(00)00544-X
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Microdialysis coupled with optical absorbance or fluorescence measurement has been used to monitor pH, pCO(2), and pO(2) in blood and buffer solutions. The system employs micro-flow streams of reagents, a simple optical system and a method of achieving steady microliter per minute flow rates. When integrated in a recirculating flow loop, the sensor has an excellent resolution in the physiologic range in buffer of +/-0.003 pH units, +/-0.5 mm Hg pCO(2), and +/-1.5 mm Hg pO(2) with response times in heparinized bovine blood of 4.8 min, 1.8 min, and 2.1 min for pH, pCO(2), and pO(2), respectively. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:183 / 188
页数:6
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