This page has moved. Click here to view.
Isolated hematuria is unaccompanied by proteinuria.
Hematuria is defined as more than 5 to 10 RBCs per high-power microscopic field from a centrifuged midstream voided urine sample. The urine may be yellow, pink, red, brown, or smoky on gross examination. Hemoglobin and myoglobin will produce the same color changes on the dipstick as intact RBCs. A false-positive test for blood can result from the presence of drugs such as ascorbic acid, sulfonamides, iron sorbitol, metronidazole, and nitrofurantoin. Therefore, each urine sample that tests positive for blood by dipstick must be examined microscopically to confirm the presence or absence of intact hematuria, bloody urine, blood in urine.