Abstract

The examination of urine is the most common screening laboratory procedure utilized for the early detection of renal or urinary tract disease in asymtomatic subjects. The authors studied 1755 routine urine specimens for visual and chemical testing and then compared the results of groups with or without microscopic examination. The results of this study are summarized as follows: 1) The most fregent positive finding in chemical testing is blood in urine with proteinuria, 79.9% of total. 2) Causes of the urinary turbidity under the microscope are due to pyuria, bacteriuria, and hematuria in order. 3) 3.97% of diagnostic yield is aquired when the urine sediment is examined under the microscope among negative groups for visual and chemical test of urines. In summary, routine microscopic examination of sediment results considerable low positivity among negative patients by routine visual and chemical test, and also the visual turbidity yield high positivity of microscopic examination.