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  • Title: An evaluation of the AVL 937C blood-gas and pH microanalyser.
    Author: Soutter WP, Aitchison TC, Thorburn J, Sharp F.
    Journal: Br J Anaesth; 1976 Dec; 48(12):1211-8. PubMed ID: 14657.
    Abstract:
    The AVL 937C blood-gas and pH microanalyser was evaluated with particular reference to its use in obsterics and in neonatal paediatrics in which its ability to analyse blood smaples as small as 40 micronlitre would be of particular value. Analysing samples of cord blood, maternal venous blood and foetal scalp blood, the reproducibility over the range of values measured was excellent with samples of 40-100 micronlitre. SD of the variation in values measured on samples collected in syringes were po2 0.11 kPa; Pco2 0.21 kPa; PH 0.005 unit. The same values for specimens collected in capillary tubes were: Po2 0.19 kPa;Pco 0.43 kPa; pH 0.013 unit. Analysis of tonometered blood samples showed a similar high standard of accuracy. The 91-98% confidence limits for the measurement of blood-gas values in samples collected in syringes were: Po2-0.22 to +0.49kPa; Pco2-0.53 to +0.42 kPa. The same values for samples collected in capillary tubes were: Po2 -0.38 to +0.70 kPa; Pco2 -0.97 to +0.86 kPa.
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