. . . "Measure renal function by checking U&Es.Also enquire if the patient is on medication, especially on warfarin, even though those on warfarin who have haematuria should be investigated in same way as those not on warfarin.An ultrasound scan of the urinary tract including the bladder and kidneys could be helpful, and if all is negative there is the option of referring to a urologist who may proceed t" . .