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

  • M. Nakamura
  • M. Yano
  • K. Shibatani
  • Y. Komoto
Instrumentation

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.

Keywords

Blood gas ISFET Lactate Ringer Patient monitoring pCO2 pH pO2 

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References

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Copyright information

© IFMBE 1987

Authors and Affiliations

  • M. Nakamura
    • 1
  • M. Yano
    • 1
  • K. Shibatani
    • 2
  • Y. Komoto
    • 3
  1. 1.Central Research LaboratoriesKuraray Co. Ltd.OkayamaJapan
  2. 2.Research & Development DivisionKuraray Col. Ltd.OsakaJapan
  3. 3.Institute for Environment & DiseaseOkayama UniversityTottoriJapan

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