A Self-Calibrating, Continuous in Vivo PO2 and PCO2 Monitor
Several in vivo blood gas monitoring systems have been developed which provide continuous monitoring of (1) PO2 (systems which use miniature Clark-type electrodes),(2) PCO2 (system of General Electric which uses a miniature and modified Severinghaus-type electrode), and (3) PO2 and PCO2 together using an in vivo gas collecting probe which feeds a mass spectrometer. While these systems are based on different principles, one feature common to all is the necessity for periodic calibration which requires collecting blood for analysis by a standard blood gas analyser. This paper describes a system for continuous monitoring of PO2 and PCO2 in body fluids which provides automatic calibration without removal of body fluids.
KeywordsSolenoid Valve Continuous Monitor Permeable Fiber Single Point Calibration Proportioner Block
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