Intermittent on line (vivo) measurement of pO/sub 2/, pCO/sub 2/, pH and K/sup +/ by means of automatic sampling of blood and automatic calibration of electrodes and amplifiers

J.A.E. Spaan, P.J. Schaar, van der, J.F. Sistermans, M.G.J. Arts, T. Lenssen, F.K. Wely, van

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Abstract

ABGA (Automated Blood Gas Analyser) may be connected by sample catheter to either an artery or vein. At desired intervals ABGA draws a blood sample automatically and performs an analysis. The measuring part consists of a special cuvette with conventional electrodes. Before a blood sample is drawn the four signal amplifiers are calibrated automatically by means of two calibration solutions equilibrated with gas mixtures of known composition. After completion of the analysis the blood within the cuvette is rinsed away but the blood within the catheter is returned to the patient with the aid of a saline infusion. The measuring cycle time including calibration is 8 minutes; without calibration 3 minutes. Blood loss per cycle amounts to 2 cm/sup 3/. With electrical grounding the patient current is less than 1 mu A
Original languageEnglish
Title of host publicationBiocapt 75: 1st international conference on biomedical transducers, Paris, 3-7 novembre 1975
Place of PublicationParis, France
PublisherElectronic Industries Assoc. France
Pages193-197
Publication statusPublished - 1975

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