Lead (Pb), Pb (Lead)
Lead, Urine (PBU)
Detecting clinically significant lead exposure in 24-hour specimens
This test is not a substitute for blood lead screening
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Measurements of urinary lead (Pb) levels have been used to assess lead exposure. However, like lead blood, urinary lead excretion mainly reflects recent exposure and thus shares many of the same limitations for assessing Pb body burden or long-term exposure.
Urinary lead concentration increases exponentially with blood lead and can exhibit relatively high intra-individual variability, even at similar blood lead concentrations.