What exactly does blood & protein in urine mean when kidney test says normal?

Blood and protein. Blood (b) in your urine( u) is an abnormal finding. Protein (p) in your urine is abnormal when it is > 80 mg/day. Your lab work may be normal when b and p first appear in your u. Do a 24 hour urine for creatinine clearance and protein and have a renal ultrasound (us). If the us doesn't show any bleeding site, have cystoscopy. If you have > 1 gram of protein/day, you may need a kidney biopsy.