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Up to 3 red blood cells per HPF is accepted as the upper limit of normal in most laboratories. This level is not significant hematuria. In the context of a clean-catch specimen without menstrual contamination or vigorous exercise, up to 3 RBCs per HPF reflects normal urinary tract health.
Zero red blood cells per high-power field confirms no detectable bleeding anywhere in the urinary tract. Healthy kidneys and urinary tract do not leak red blood cells into urine. A result of zero provides strong reassurance against kidney stones, infections, inflammation, or malignancy causing blood loss into the urine.
Excellent result. No urinary blood detected.
Urine RBC: {{value}} per HPF — none (ref: 0–{{high}} per HPF)Zero to one red blood cells per high-power field is within the normal range. Isolated single red blood cells can appear in urine from benign causes like vigorous exercise, minor mucosal contact, or sample handling. This level does not constitute significant hematuria.
Normal result. No hematuria concern.
Urine RBC: {{value}} per HPF — very low (ref: 0–{{high}} per HPF)One to two red blood cells per HPF is at the very low end of the normal range. This borderline finding is common and usually benign, often related to vigorous exercise, sexual activity, menstrual contamination, or minor trauma to the urethral lining. It does not constitute clinically significant hematuria.
Generally normal. Retest if concerned. Ensure clean-catch technique to minimize contamination.
Urine RBC: {{value}} per HPF — minimal (ref: 0–{{high}} per HPF)Up to 3 red blood cells per HPF is accepted as the upper limit of normal in most laboratories. This level is not significant hematuria. In the context of a clean-catch specimen without menstrual contamination or vigorous exercise, up to 3 RBCs per HPF reflects normal urinary tract health.
Normal result. If borderline, ensure good collection technique at next test.
Urine RBC: {{value}} per HPF — normal (ref: 0–{{high}} per HPF)Zero to two RBCs per HPF represents the optimal finding — no meaningful amount of blood is entering the urine from the kidneys or urinary tract. The absence of blood in urine provides strong reassurance against active kidney disease, kidney stones, infection-related inflammation, or urological malignancy.
Excellent result.
Urine RBC: {{value}} per HPF — optimal (ref: 0–2)A borderline elevated RBC count (3–10 per HPF) represents microscopic hematuria that warrants attention. While it can be caused by vigorous exercise, UTI, kidney stones, or benign prostatic hyperplasia, it can also be an early sign of more serious conditions including glomerulonephritis, urological malignancy, or kidney vascular disease.
Discuss with your doctor. A repeat clean-catch specimen and investigation to rule out UTI, stones, and in appropriate age groups, malignancy screening, are standard follow-up steps.
Urine RBC: {{value}} per HPF — borderline elevated (ref: 0–{{high}} per HPF; borderline: 3–10)Significant microscopic hematuria with 10–50 RBCs per HPF requires thorough investigation. At this level, blood in the urine is meaningful and unlikely to be explained by exercise or sample contamination alone. Possible causes range from kidney stones and infection to glomerulonephritis, kidney disease, and — particularly in adults over 50 — urological malignancy.
Medical evaluation is needed. Imaging (CT urogram or ultrasound), cystoscopy in appropriate age groups, kidney function tests, and urine cytology may be needed based on clinical context.
Urine RBC: {{value}} per HPF — elevated (ref: 0–{{high}} per HPF; elevated: 10–50)More than 50 RBCs per HPF represents gross or near-gross hematuria with very heavy blood loss into the urine. This level is associated with significant kidney disease (rapidly progressive glomerulonephritis, kidney infarction, noticeable kidney trauma), large kidney stones obstructing and abrading the ureter, advanced urinary tract malignancy, or noticeable infection. The amount of blood loss may be clinically significant.
Seek urgent medical evaluation. Critically elevated urinary RBCs require urgent imaging, specialist evaluation, and possibly emergency intervention depending on the underlying cause.
Urine RBC: {{value}} per HPF — critically elevated (ref: 0–{{high}} per HPF; critical: >50)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.