It does not specify requirements for blood collection needles, needle holders, blood culture receptacles or "arterial" blood gas collection devices that can be used for venous blood. White Blood Cells (Leukocytes) Account for only about 1% of the blood. INTRODUCTIO: 1.1. Approximate locations of nerves, veins, and the brachial artery as they pass through the antecubital area are identified and accompanied by detailed text that discusses the precautions all specimen collection personnel must know when drawing blood for clinical testing to prevent patient injury. Allow collection site to dry after cleaning with the alcohol pad. If superficial veins are not readily apparent, you can force blood into the vein by massaging the arm from wrist to elbow, tap the site with index and second finger, apply a warm, damp washcloth to the site for 5 minutes, or lower the extremity over the bedside to allow the veins to fill. If you have contact with a person’s blood or body fluids you could be at risk of HIV, hepatitis B or hepatitis C, or other blood borne illnesses. COLLECTION OF BLOOD SPECIMENS MANUAL Page 2 of 27 1. It is a large vein immediately visible under the skin. BLOOD COLLECTION ON BABIES: