See below: Hemoglobin refers to red blood cells (rbc) in the urine. “Small” implies not enough red cells to cause visible blood in the urine to the naked eye (aka microhematuria) but may still be significant. Microscopic exam should be done with the normal value being 0-3 rbc/hpf. Persistent microhematuria >3 rbc/hpf deserves further follow-up and/or evaluation with blood tests, imaging studies, cystoscopy.
Answered 12/18/2020
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