• Blood gas analyzers utilize electrochemical techniques for the measurement of pH, PCO2, and PO2.
• Measurements of pH, PCO2, and PO2 are traditionally accomplished by blood gas analyzers composed of specially designed electrodes encased in a thermostatically controlled chamber.
• Calibration establishes a relationship between electrode output and the units in which the measured variables are expressed.
• The co-oximeter is the most accurate method available for measuring the four clinically relevant hemoglobin moieties.
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