Simple Filter Paper Method for Home Monitoring of Blood Glucose, Lactate, and 3-Hydroxybutyrate

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Abstract
Previous methods for assessing the control of diabetes at home have concentrated on the measurement of glucose concentrations in urine and, more recently, blood. These levels reflect only one aspect of deranged metabolism in the disease. A technique is described whereby glucose, lactate, and 3-hydroxybutyrate can be measured in capillary blood samples dried on boric acid impregnated filter paper. The technique is sufficiently sensitive to measure 0·05 mmol/l glucose, 0·02 mmol/l lactate, and 0·004 mmol/l 3-hydroxybutyrate with precisions of 4·0%, 4·5%, and 8·0%, respectively. This method could prove useful in the broader metabolic assessment of the diabetic state.