Lead Poisoning and Kids
Lead Poisoning: What It Is, How to Test, What to Do
WebMD News Archive
Is Your Child at Risk of Lead Poisoning? continued...
A recent U.S. Preventive Services (USPS) Task Force panel noted in a 2006
report that children's blood-lead levels usually peak at about age 2 and go
down after that.
Rosen says all children's blood lead levels should be tested at age 12
months and again at age 24 months -- with additional testing every six months
if the child is at high risk of lead exposure.
"If a child has never been tested for lead, it should be done regardless
of the child's age," Rosen says. "The prime question for a pediatrician
to ask is what is the status of the apartment or home where the child lives: Is
there peeling paint? Is it an old building, or new construction?"
The USPS panel reached a different conclusion. It found no evidence that
universal lead-exposure screening leads to better clinical outcomes than
targeted screening of at-risk children.
What to Do for Children With Lead Poisoning
Unfortunately, once a child has absorbed a dangerous amount of lead, there's
no quick way to make the lead go away.
Children with dangerously high blood lead levels -- 45 micrograms/dL or more
-- can be treated by chelation (pronounced key-LAY-shun). Chelation involves
giving a child one of two drugs that quickly remove lead from the blood.
Chelation can save the life of a child with acute lead poisoning. But it
does not remove all lead from the body. Most ingested lead is stored in the
bones and leaches back into the bloodstream -- and brain -- over time.
"Chelation stops lead poisoning from being life-threatening," Rosen
says. "Has damage already been done to the brain? Yes. Chelation does not
reverse the adverse effects of lead on the brain. What it does do is save
lives. Chelation is of no value -- and may actually harm -- children with lead
levels under 45 micrograms/dL."
The USPS panel notes that repeated chelation may temporarily lower blood
lead levels, but these reductions are not sustained. The panel found no
evidence that these temporary reductions improve health or behavioral
What does work? Rosen says the first thing to do is to have the child's
pediatrician work with local health authorities to find and remove the source
of lead poisoning.