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. You will probably be given a mild sedative an hour or so before the test. The operator injects a local anesthetic into the chosen site. Operator then makes a small incision through the skin.
Bone marrow is removed by suction and collected into a sterile syringe.
Needle is withdrawn. Bone marrow is sent to the laboratory for analysis. After the test Immediate post-test care Apply pressure to the site where blood or bone marrow was drawn until the bleeding stops. 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.