Definition : Healthy individuals may have occasional red blood cells in
the urine (up to 12 500 cells/mL), but the presence of visible
(macroscopic) haematuria or non-visible haematuria (microscopic,
only detectable on dipstick testing) is indicative of significant
bleeding from somewhere in the urinary tract
source
Once
infection, menstruation and causes of a positive urinary dipstick
in the absence of red cells (haemoglobinuria/myoglobinuria) haveglomerular cause is not suspected (see below), it may be
appropriate to manage them by periodic observation in primary
care, although occasionally these individuals develop significant
overt renal disease during follow-up.
source
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