Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. Preparation may vary depending on the specific test.

Review Date: 9/25/2001 12:00:00 AM Reviewed By:A.D.A.M. Medical Illustration Team

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