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  • Title: [Metabolic acidosis in children: the usefulness of 'anion gap'].
    Author: Kist-van Holthe tot Echten JE, Maaswinkel-Mooy PD, Berger HM, van der Heijden AJ.
    Journal: Ned Tijdschr Geneeskd; 1999 Mar 27; 143(13):649-51. PubMed ID: 10321293.
    Abstract:
    Metabolic acidosis occurs frequently in small children. The most common causes are hypoxia, sepsis, gastroenteritis and hypovolaemia. Calculation of the anion gap is useful in establishing the cause. An increased anion gap represents unmeasured anions, e.g. lactate in lactic acidosis. Metabolic acidosis was diagnosed in two boys aged one year and six weeks respectively. The first patient had a normal, the second an increased anion gap in blood. By determining the pH and the anion gap in urine it is possible to distinguish between a proximal and a distal tubular disease. The first patient had distal renal tubular acidosis; he recovered after correction of the acidosis. The second patient had a defect in the mitochondrial respiratory chain; he died at the age of seven months.
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