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  • Title: Sources of error in neonatal blood sampling.
    Author: Patel H, Ryan SW, McLain B.
    Journal: Arch Dis Child; 1988 Jul; 63(7 Spec No):752-3. PubMed ID: 3137898.
    Abstract:
    Significant underestimation of blood electrolyte concentrations may occur if less than 1 ml of blood is withdrawn from an indwelling arterial line before taking the sample for analysis. Compared with arterial samples capillary samples give significant overestimations of potassium concentration and carbon dioxide tension, and significant underestimation of oxygen tension.
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