About Red Blood Cell (RBC) Count
The red blood cell (RBC) count is a measurement of the number of red blood cells in a given volume of blood. These cells are critical for transporting oxygen from the lungs to the body and returning carbon dioxide from the body to the lungs for excretion. The RBC count is an important component of a complete blood count (CBC) and can indicate various health conditions, such as anemia, dehydration, or polycythemia.
Reference Values
Optimal Range
4.7 - 6.1 x10^6/µL
Women's Optimal Range
4.2 - 5.4 x10^6/µL
Elite Value
Not specified
Health Implications
High
Elevated levels may indicate polycythemia vera, a rare blood disorder, or conditions such as dehydration and hypoxia which can increase red blood cell production.
Low
Low levels may be associated with anemia, leading to fatigue and weakness, or chronic diseases affecting bone marrow production, such as leukemia or kidney disease.
Symptoms
High
May include a flushed red complexion, headaches, dizziness, and high blood pressure.
Low
Can include dizziness, fatigue, shortness of breath, and pale skin.
Lifestyle Factors
Specimen Type
Testing Methods
Also Known As
Scientific Sources
- 1. McPherson, R. A., & Pincus, M. R. (2021). Henry's Clinical Diagnosis and Management by Laboratory Methods (24th ed.). Elsevier.|2. Kumar, V., Abbas, A. K., & Aster, J. C. (2020). Robbins and Cotran Pathologic Basis of Disease (10th ed.). Elsevier.|3. World Health Organization. (2021). Haemoglobin concentrations for the diagnosis of anaemia and assessment of severity.|4. American Society of Hematology. (2020). Red Blood Cell Disorders.|5. National Heart, Lung, and Blood Institute. (2022). Anemia.