Red Blood Cells (Microscopic)
- Sample Type
- Standard
- Fasting
- No
- Unit
- /hpf
The presence of Red Blood Cells (RBCs) in the urine, known as hematuria, is a critical finding in a Complete Urine Examination. Microscopic analysis quantifies the number of erythrocytes per high-power field (HPF). It helps differentiate between glomerular diseases (where dysmorphic RBCs are often seen) and non-glomerular causes such as infections, calculi, or malignancies of the urinary tract. In the context of a routine screen, it serves as an early indicator of renal parenchymal injury or urological pathologies.
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Why Context Matters
Microscopic hematuria can be transiently caused by vigorous exercise, fever, or menstrual contamination. Additionally, the morphology of the RBCs (acanthocytes vs. isomorphic cells) is highly operator-dependent and crucial for determining if the source is the kidney (glomerular) or the lower tract.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Red Blood Cells (Microscopic):
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Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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