Red Blood Cell Count (RBC)
- Sample Type
- Standard
- Fasting
- No
- Unit
- 10^12/L
The Red Blood Cell (RBC) count measures the total number of erythrocytes in a microliter or liter of blood. As part of a Complete Blood Picture (CBC), it is fundamental for evaluating the blood's capacity to transport oxygen from the lungs to peripheral tissues via hemoglobin. It is a primary indicator for diagnosing anemia, polycythemia, and monitoring the bone marrow's response to various therapeutic interventions or chronic diseases.
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Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
RBC counts can be falsely elevated due to hemoconcentration (dehydration) or living at high altitudes. Conversely, hemodilution (e.g., pregnancy or over-hydration) can lower the count without indicating true anemia. A second opinion is often needed to correlate RBC with MCV and MCHC indices to differentiate between iron deficiency, B12 deficiency, or genetic conditions like Thalassemia.
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 Cell Count (RBC):
Official Sources
- RBC count: MedlinePlus Medical EncyclopediaMedlinePlus
- High red blood cell count - Mayo ClinicMayo Clinic
Research & Guidelines
Related Indicators
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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