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Capillary Blood Glucose Monitor

Evaluation in a Newborn Nursery

Department of Pathology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115

Tobias Kircher, MD

Department of Pathology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115

Chuck Reed, MT

Department of Pathology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115

The performance of a rapid capillary blood glucose monitor, the Glucoscan 2000, was evaluated in a neonatal patient population by comparison with a reference method on 283 paired patient samples. The median glucose was 56 mg/dL (3.1 mmol/L). The slope of the regression line was .93 with a correlation coefficient r of .82. The average error in Glucoscan values at low, intermediate and high glucose ranges was 43%, 20% and 12% respectively. Precision analysis by replicate determinations also showed an increased coefficient of variation, 7.4%, at low glucose values.

The Glucoscan 2000 lacks sufficient accuracy and precision at low glucose values to serve as the exclusive analytic test for the diagnosis of neonatal hypoglycemia.

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