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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.
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.