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Complete blood count - series - Procedure |     
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A CBC requires a simple blood drawing. Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand.Preparation: There is no special preparation needed for this test.How the test will feel:When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. After the blood is drawn, there may be some throbbing.There are a few slight risks associated with a CBC:- Excessive bleeding
- Fainting or feeling lightheaded
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
- Multiple punctures to locate veins
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Review Date: 9/11/2006
Reviewed By: Corey Cutler, MD, MPH, FRCP(C), Assistant Professor of Medicine, Harvard Medical School; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA. Review provided by VeriMed Healthcare Network.
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