QUESTION: Difference in results for Urine vs Blood tests for Lead - 02 Apr 2007 Minnesota, USA
My daughter has been having petit mal seizures and various other cognitive issues for several years.
Urine vs. Blood testing:
We had her urine tested on 1/23/07 for toxic metals. Her lead level was considered elevated at 130 mg/dL Creatinine. The method listed is ICP-MS. It was a six-hour collection, post provocative. Provoking agent was DMSA. This test indicated her urine lead to be three times the upper expected limit per the reference population.
On 3/23/07, we then had her blood tested for lead. This was a venous specimen. The result came back as <3, which, in the US, is considered within normal limits, apparently.
I am wondering, which test is more a reflection of her status? Can they both be accurate? What does this mean? I would appreciate any help you can give me. I am confused.
Thank you for helping out those of us who don't know the answers!
Hastings, MN USA
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