Erythrocytes 

 

Urology
original magnification x500

Author : Dr Pierre Hébert
Translation by Dr. Khyali R. Mittal

Morphology: the erythrocytes are seen with modified morphology due to the urinary density. Then a weak density will make them swell giving them an appearance of spherical form while a strong density will compress them. They could be differentiated from leucocytes by the absence of nucleus and presence of a fold in the cytoplasmic membrane. Urine with density of less than 1.008 or with a highly alkaline pH could cause bursting of erythrocytes. In normal urine, the number of erythrocytes per field at 400x should not exceed 5. The causes of hematuria are numerous. This could happen as a result of intense exercice, problems in coagulation, trauma, calculus, neoplasm and inflammation with or without infection. The method of collecting urine is important because it helps to localise the origin of the problem.

 

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