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Online pH,pCO2 andpO2 monitoring system using two-way cyclic pumping of lactate Ringer as a baseline solution

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Abstract

A system for the online, simultaneous and intermittent analysis of blood pH, pCO2 pO2 using two-way cyclic pumping of lactate Ringer as a baseline solution is described. The multi-gas sensor is composed of a pH-ISFET with a temperature sensor, a pH-ISFET-based pCO2 sensor and a Clark-type pO2 sensor, bundled in an epoxy rod, and held in place in a flow cell which is directly connectable to an indwelling cannula. The system is controlled by a microcomputer, which supervises pump operation, temperature-compensation of sensor outputs, one-point calibration using sampled blood analysis, and provides graphical display of monitored results. Results of arterial blood-gas monitoring for mongrel dogs are presented which demonstrate the reliability of the present system over extended periods.

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Authors and Affiliations

  1. Central Research Laboratories, Kuraray Co. Ltd., 2045-1 Aoeyama, Sakazu, Kurashiki, PO Box 35, Okayama, Japan

    M. Nakamura & M. Yano

  2. Research & Development Division, Kuraray Col. Ltd., 12-39 Umeda, 1-chome, Kita-ku, Osaka, Japan

    K. Shibatani

  3. Institute for Environment & Disease, Okayama University, Misasa, Tottori, Japan

    Y. Komoto

Authors
  1. M. Nakamura
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  2. M. Yano
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  3. K. Shibatani
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  4. Y. Komoto
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Nakamura, M., Yano, M., Shibatani, K. et al. Online pH,pCO2 andpO2 monitoring system using two-way cyclic pumping of lactate Ringer as a baseline solution. Med. Biol. Eng. Comput. 25, 45–50 (1987). https://doi.org/10.1007/BF02442819

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  • DOI: https://doi.org/10.1007/BF02442819

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