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  • Title: Accuracy and reproducibility of arterial blood-gas and pH measurements.
    Author: Ladegaard-Pedersen HJ.
    Journal: Acta Anaesthesiol Scand Suppl; 1978; 67():63-5. PubMed ID: 28631.
    Abstract:
    In 30 patients blood samples were taken from both radial arteries and analysed for PCO2, PO2 and pH. The influence of sampling technique on the accuracy of blood-gas analysis was determined. The 95% confidence limits for PCO2 measurements were +/-0.32 kPa (2.4 mmHg), and for PO2 measurements were +/-1.16 kPa (8.8 mmHg) in the range below 20 kPa, and +/-2.94 kPa (22.0 mmHg) above 20 kPa. For pH, the 95% confidence limits were +/-0.014. Only the PO2 measurements were significantly influenced by the sampling procedure.
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