Reference Values for Neonates and Children for the UF-100 Urine Flow Cytometer

The UF-100 fully automated urine flow cytometer classifies urinary particles on the basis of their light scattering, fluorescence, and impedance properties. The UF-100 counts erythrocytes, leukocytes, bacteria, epithelial cells, and casts. The operating principles of the UF-100 and its precision, accuracy, and analytical sensitivity have been published previously (1)(2)(3)(4). The high sensitivity of the flow cytometer leads to different reference values. In a recent report, Gyory et al. (5) presented reference values for children; for newborns, however, reference values have not as yet been published. In this report, we present preliminary reference values for neonates and children.To establish these reference ranges, samples from two groups of children were analyzed. The pediatricians considered the infants in the first group to have no afflictions of the urinary tract after studying the case history, laboratory values (e.g., creatinine and urea), and the urine test strip results (n = 114). These infants were admitted to the neonatal clinic and remained there for >5 days. Admission automatically included urine examination in daily routine programs without additional consent …