How It Is Done
Blood tests for lead should be done by a lab experienced in proper technique.
Blood sample from a heel stick
For a heel stick blood sample, several drops of blood are collected from the heel of your baby. The skin of the heel is first cleaned with alcohol and then punctured with a small sterile lancet. Several drops of blood are collected in a small tube. When enough blood has been collected, a gauze pad or cotton ball is placed over the puncture site. Pressure is maintained on the puncture site briefly, and then a small bandage is usually applied.
A heel stick must be done carefully to prevent contamination of the sample from lead on the skin. If a heel stick blood sample comes back positive for lead, a sample of blood from your baby's vein will be tested to confirm the results.
Blood sample from a vein
The health professional taking a sample of your blood will:
- Wrap an elastic band around your upper arm to stop the flow of blood. This makes the veins below the band larger so it is easier to put a needle into the vein.
- Clean the needle site with alcohol.
- Put the needle into the vein. More than one needle stick may be needed.
- Attach a tube to the needle to fill it with blood.
- Remove the band from your arm when enough blood is collected.
- Put a gauze pad or cotton ball over the needle site as the needle is removed.
- Put pressure on the site and then put on a bandage.
|By:||Reference Healthwise Staff||Last Revised: Reference July 26, 2012|
|Medical Review:||Reference John Pope, MD - Pediatrics
Reference R. Steven Tharratt, MD, MPVM, FACP, FCCP - Pulmonology, Critical Care Medicine, Medical Toxicology