Iodine, Urine




Test Mnemonic

UIODNE

CPT Codes

  • 83018 - QTY (1)

Includes

  • Hours Collected
  • Total Volume
  • Creatinine, Urine - per volume
  • Creatinine, Urine - per 24h
  • Iodine, Urine - per volume
  • Iodine, Urine - per 24h
  • Iodine, per gram of CRT

Performing Laboratory

ARUP


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
8 mLUrine, 24-hour (well-mixed)Plastic container RefrigeratedPatient Prep: High concentrations of iodine may interfere with testing. Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, non-essential over-the-counter medications (upon the advice of their physician). Avoid iodine-containing medications or contrast agents for at least 1 month. Avoid gadolinium-based contrast media for at least 48 hours. Collection: Collect in a plastic container, mix well and aliquot into a trace metal free transport tube (ARUP #43116). Record total volume and collection time interval on specimen.

Alternate Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
8 mLUrine, randomPlastic container RefrigeratedPatient Prep: High concentrations of iodine may interfere with testing. Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, non-essential over-the-counter medications (upon the advice of their physician). Avoid iodine-containing medications or contrast agents for at least 1 month. Avoid gadolinium-based contrast media for at least 48 hours. Collection: Collect in a plastic container, mix well and aliquot into a trace metal free transport tube (ARUP #43116). Record total volume and collection time interval on specimen.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mL     

Stability

Environmental Condition Description
Refrigerated2 months
Ambient2 months
Frozen2 months

Days Performed

Tue, Thu, Sat

Turnaround Time

2 - 6 days

Methodology

Name Description
Inductively Coupled Plasma / Mass Spectrometry (ICP-MS) 

Reference Range

Iodine, per gram of CRT
Sex Age From Age To Type Range Range Unit
       Normal35.0-540.0ug/g crt
Iodine, Urine per 24h
Sex Age From Age To Type Range Range Unit
   Years15 YearsNormalNot establishedug/day
 16 Years99 YearsNormal93.0 - 1125.0ug/d
Iodine, Urine per Volume
Sex Age From Age To Type Range Range Unit
   Years15 YearsNormalNot establishedug/L
 16 Years99 YearsNormal26.0 to 705.0ug/L

Special Info

Patient Prep: High concentrations of iodine may interfere with testing. Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, non-essential over-the-counter medications (upon the advice of their physician). Avoid iodine-containing medications or contrast agents for at least 1 month. Avoid gadolinium-based contrast media for at least 48 hours. Collection: Collect in a plastic container, mix well and aliquot into a trace metal free transport tube (ARUP #43116). Record total volume and collection time interval on specimen. Urine transported in a non-trace element-free tube or contaminated with iodine, gadolinium, blood, fecal material or acid preservative will be rejected. This test is New York DOH approved.

Clinical Info

This test is useful for the assessment of iodine nutritional status. This test reports total iodine from all iodine-containing species present in the specimen but does not determine the chemical form (species) of the iodine present. Values > 1000 µg/L may indicate dietary excess, but more frequently suggest recent drug or contrast media exposure.