All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
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.
Urine cadmium levels primarily reflect total body burden of cadmium. Cadmium excretion above 3.0 mcg/g creatinine indicates significant exposure to cadmium.
For occupational testing, the Occupational Safety and Health Administration (OSHA) cadmium standard is less than 3.0 mcg/g creatine and the biological exposure index is 5 mcg/g creatinine.