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By Mayo Clinic staffThe hematocrit is a simple blood test. You won't need to fast before the test or make other preparations.
References
- Fischbach FT, et al. Manual of Laboratory and Diagnostic Tests. Online ed. Philadelphia, Pa.: Lippincott Williams & Wilkins; 2008.
- McPherson RA, et al, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. Philadelphia, Pa.: Saunders Elsevier; 2007.
- Laboratory reference values. Hematocrit. Rochester, Minn.: Mayo Foundation for Medical Education and Research; Nov. 2008.