Skin over the vein to be stuck is cleaned with alcohol or other antiseptic on a piece of cotton. When blood is drawn from a vein, the operator feels the vein to be used then punctures both the skin and vein in one quick stroke. The needle used is a sterile, disposable needle attached to a sterile, disposable syringe. Tubes are treated with an anti-coagulant chemical to prevent clotting. If blood is collected from finger, heel or ear lobe, skin over selected site is cleaned with an antiseptic.
Operator quickly pierces skin to a shallow depth, using a sterile, disposable metal lancet.
Drop or two of blood produced is collected into a capillary pipette. After the test Immediate post-test care Apply pressure to the puncture site with cotton provided by the laboratory. If a vein has been punctured, raise your entire arm over your head while applying pressure. Some discoloration, soreness or swelling may develop at the venepuncture site. This responds well to moist, warm compresses applied every 2 to 4 hours.