Erythrocyte limits in haematuria.
The boundary-line between gross haematuria and microscopical haematuria is estimated to be at 5000 erythrocytes/mm3 of urine. The quantification is made by counting red blood cells in freshly voided non-centrifuged urine. A naked eye estimation of the colour of each tube was performed with a light beam from both in front (Fig. 1) and behind (Fig. 2). The colour observed can be correlated to the quantity of RBC/mm3.
D004912:Erythrocytes / Q000166:cytology*; D006417:Hematuria / Q000097:blood*; D006801:Humans; D014556:Urine / Q000166:cytology*