Arsenic, Cadmium, Mercury, Lead
If arsenic concentration is greater than or equal to 10 mcg/L, then speciation will be performed at an additional charge.
Detecting arsenic, cadmium, mercury and lead exposure and toxicity using 24-hour urine specimen.
1. High concentrations of gadolinium and iodine are known to interfere with most metals tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
2. Patient should not eat seafood for a 48-hour period prior to start of, or during, collection.
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Consumption of seafood before collection of a urine specimen for arsenic testing is likely to result in a report of an elevated concentration of arsenic found in the urine, which can be clinically misleading.
Collection of urine specimens through a catheter frequently results in elevated values because rubber contains trace amounts of cadmium that are extracted as urine passes through the catheter.
To avoid contamination by dust, specimen should be collected away from the site of suspected exposure.
0-17 years: not established
> or =18 years: <35 mcg/24 hour
> or =18 years: <0.7mcg/24 hour
> or =18 years: <2 mcg/24 hour
Toxic concentration: >50 mcg/24 hour
The concentration at which toxicity is expressed is widely variable between patients.
50 mcg/24 hour is the lowest concentration at which toxicity is usually apparent.