Lead levels - blood

Definition

Blood lead level is a test that measures the amount of lead in the blood.

How the Test is Performed

A blood sample is needed. Most of the time blood is drawn from a vein located on the inside of the elbow or the back of the hand.

In infants or young children, a sharp tool called a lancet may be used to puncture the skin.

How to Prepare for the Test

No special preparation is needed.

For children, it may be helpful to explain how the test will feel and why it is done. This may make the child feel less nervous.

How the Test will Feel

You may feel slight pain or a sting when the needle is inserted. You may also feel some throbbing at the site after the blood is drawn.

Why the Test is Performed

This test is used to screen people at risk for lead poisoning. This may include industrial workers and children who live in urban areas. The test is also used to measure how well treatment for lead poisoning is working. Lead is common in the environment, so it is often found in the body in low levels.

Normal Results

Small amounts of lead in adults are not thought to be harmful. However, even low levels of lead can be dangerous to infants and children. It can cause lead poisoning that leads to problems in mental development.

Adults:

Children:

Normal value ranges may vary slightly among different laboratories. Talk to your health care provider about the meaning of your specific test results.

What Abnormal Results Mean

In adults, a blood lead level of 5 µug/dL or 0.24 µumol/L or above is considered elevated. Treatment may be recommended if:

In children:


Review Date: 5/21/2017
Reviewed By: Laura J. Martin, MD, MPH, ABIM Board Certified in Internal Medicine and Hospice and Palliative Medicine, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

This information should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. © 1997- 2007 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.