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 a finger, heel or ear lobe, skin over the selected site is cleaned with an antiseptic. The operator quickly pierces the skin to a shallow depth, using a sterile, disposable metal lancet. The drop or two of blood produced is collected into a capillary pipette.
Operator takes multiple blood samples.
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. Activity after test Resume taking any medications that were withheld before the test.