Selenium, Urine

Casandra

Casandra Test Code AR04899Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0025067CPT Code 84255

Also known as: SE-U

Clinical Use

Order Test

Use

Urine selenium levels can be used to assess nutritional status and monitor excretion. Selenium deficiency can occur endemically or due to sustained TPN or restricted diets, which has been associated with cardiomyopathy and can exacerbate hypothyroidism. Selenium toxicity is relatively rare, but excess intake can lead to symptoms of selenosis including gastrointestinal upset, hair loss, white blotchy nails, and mild nerve damage.

Special Instructions

Not provided.

Limitations

Elevated results may be due to skin or collection-related contamination, including use of non-certified trace element-free containers. If contamination is suspected, confirmation with a specimen collected in a certified trace element-free container is recommended. The test's performance characteristics are determined by ARUP Laboratories and are intended for clinical purposes in a CLIA-certified laboratory.

Test Details

New York Approved

Methodology

Mass Spectrometry

Biomarkers

Selenium

Analyte

Urine Selenium Levels

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

LOINC Codes

Result Codes

35674-1 - Creat ?Tm Ur-mCnc
2162-6 - Creat 24h Ur-mRate
29917-2 - Selenium/Creat 24h Ur
5727-3 - Selenium 24h Ur-mRate
19153-6 - Specimen vol ?Tm Ur
30211-7 - Specimen collect Time Spec
30927-8 - Selenium ?Tm Ur-mCnc

Result Turnaround Time

1-5 days

Specimen

Urine

Volume

8 mL

Minimum Volume

1 mL

Container

ARUP Trace Element-Free Transport Tube

Collection Instructions

24-hour or random urine collection in a plastic container. Transfer an 8 mL aliquot from a well-mixed collection.

Patient Preparation

Discontinue nutritional supplements, vitamins, minerals, and nonessential medications as advised by a physician. Abstain from iodine-containing medications or agents for at least 1 month prior.

Storage Instructions

Refrigerated; also acceptable at room temperature or frozen.

Causes for Rejection

Urine collected within 48 hours after administration of gadolinium (Gd) contrast media, acid-preserved urine, specimens contaminated with blood or fecal material, non-trace element-free containers (except original device).