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By Mayo Clinic staffA nurse or medical assistant may collect a blood sample by pricking your finger and collecting the blood into a narrow glass tube or by drawing blood with a needle from a vein in your arm. You may feel some tenderness at the site, but you'll be able to resume normal activities.
- 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.
