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Selenium, 24 Hour Urine
Test Code16866
CPT Codes
84255
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
2 mL aliquot of a 24-hour urine collection in an acid washed container
Minimum Volume
1 mL
Instructions
Collect urine in an acid washed plastic container. Avoid worksite collection. Send aliquot in a Specialty tube.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)
Setup Schedule
A.M. Sets up 2 days a week.
Report Available
Reports same day.
Clinical Significance
Selenium is considered an essential trace element. It enters the food chain through plants. Selenium plays an important role in the control of thyroid hormone metabolism. Selenium deficiency may cause reduced growth rates, owing to a feedback response, which lowers tri-iodothyronine-mediated synthesis of growth hormone in the pituitary, while a combined deficiency or selenium and iodine exacerbates hypothyroidism. Selenium is important for proper reproductive performance. Selenium has numerous applications in industry, including its use in electronic semiconductors, as a decolorizer for ceramics and glass, a vulcanizing agent for rubber and an antidandruff agent in shampoos.
