SEPTEMBER 15, 2007
VOLUME 4 NO. 15

PATIENTS & PRACTICE
WHAT TO TELL YOUR PATIENTS

Chinese toy scare has parents fretting about lead


Check that toybox

Leaded toys: RC2 Corp recalled its Thomas & Friends Wooden Railway toys, because of lead paint. Mattel recalled items, including "Sarge," the die cast truck from the "Cars" toys. Other toys, from Mattel's Fisher Price line, included Sesame Street and Dora the Explorer items.

Dangerous attraction: Polly Pocket playsets from Mattel, and some Barbie, Batman and Doggie Day Care sets were recalled because of improperly attached, small-but-powerful magnets. If more than one of these is dislodged and swallowed, attraction between them can interrupt GI motility in the intestines. If parents can't bear to toss the toys, they should at least remove the magnets.

Pickled PJs: Charles Parsons Superlux blankets and TWL pyjamas were pulled from several stores' shelves in New Zealand when found to contain high levels of formaldehyde. A probable carcinogen, formaldehyde also irritates the eyes, skin and respiratory tract, and high levels are bad news for the nervous system. There were also several reported cases of the flannelette pyjamas easily catching fire, causing serious burns. Formaldehyde is added to the products to prevent mildew.

Last month toymaker Mattel recalled millions of toys sold in Canadian stores after discovering "impermissible levels of lead" in their paint. Dr Margaret Thompson, medical director at the Ontario Poison Centre and a clinical toxicologist at the Hospital for Sick Children, expects you might see some extra parents with kids in tow, brimming with questions about the hazards of Elmo and Barbie. Some will even demand you perform a battery of tests to make sure their child's not been poisoned.

Dr Thompson suggests you start by telling parents that lead toxicity from contaminated paint on toys is extremely rare. They'll probably still have a lot of questions. Here are the most common, and how to answer them.

"What are the symptoms of lead poisoning?" Signs and symptoms include weakness and fatigue, stomach ache, fever and vomiting. A child may develop a pale complexion due to anemia. With extensive poisoning, the child may experience irritability and cognitive difficulty due to neural toxicity.

"Should my child be tested?" If anything, lead contamination in children will most likely be picked up in a routine screening during visits with the pediatrician. "Family doctors should be attuned to the risk, and let parents know this," says Dr Thompson.

But parents may not be willing to wait until a routine check-up if they've found their child with a tainted toy in their mouth. "If a child has mouthed one of these toys a couple of times, parents shouldn't panic," says Dr Thompson. "There's not an easy, reliable test for lead contamination," she adds. "It's expensive to do, done using atomic absorption. That capability isn't available in many labs — so it has to be indicated."

More extensive exposure to lead is a better reason to consider testing. "If a child has sucked all of the paint off of one of the contaminated toys, or may have swallowed an item made of lead, it would be a good reason to see the family doctor, or do tests," says Dr Thompson. Since lead accumulation may occur gradually over time, a child may appear normal while lead concentrations are slowly increasing.

"What if my kid does have lead poisoning?" The standard cut-off for a diagnosis of lead poisoning is 10 µg/dL. There have recently been rumblings in the scientific community that even blood levels below this concentration are associated with significant IQ impairment. Some have called for the cut-off to be drastically lowered. Severe poisoning can also cause slowed body growth, hearing problems, behaviour or attention problems and kidney damage. Lead poisoning can be fatal in children in extreme doses, above 70 µg/dL.

"If screening confirms high levels," says Dr Thompson, "you can get in touch with a toxicologist, or a poison control centre. Get advice on treatment, and do a proper history." A history is important, because the source of contamination should be determined. "Remove the source from the child's environment, of course," says Dr Thompson. If the source might be an ingested object, radio-opacity in the gastro-intestinal system should show up in an x-ray.

"How do you treat lead poisoning?" For mild cases, reducing lead ingestion and observation are best. For very high levels, some pretty harsh meds will be needed. "A prescription should be written for a chelation medication." These are not without their downsides, though, and they should only be used when blood levels reach the 45 µg/dL range. It's still critical parents find and remove the source as well.

"Where else are my kids exposed to lead?" "There have been many toy recalls across the country," says Dr Thompson, "but I'm not aware of any child who's developed lead poisoning because of a toy." The threat of lead contamination from toys should also be weighed against other lead sources. Old house paints are just as, if not more, dangerous to kids. "I've prescribed children chelating agents a total of five times in my whole career, and the contamination was never from toys," says Dr Thompson. A couple of these cases were from children living in an old group home, she adds. "They had a particular propensity for abnormal gnawing behaviour." Another case of hers involved contamination from a 'medication' given by an alternative medicine practitioner.

 

 

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