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Test ID IODU Iodine, Random, Urine

Useful For

Monitoring iodine excretion rate as an index of daily iodine replacement therapy

 

Correlating total body iodine load with (131)I uptake studies in assessing thyroid function

Method Name

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

Reporting Name

Iodine, Random, U

Specimen Type

Urine

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 5-mL tube (Supply T465) or a clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 1 mL                                                                                                       

Collection Instructions:

1. Collect a random urine specimen.

2. See Trace Metals Analysis Specimen Collection and Transport in Special Instructions for complete instructions.

Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 146 days
  Ambient  146 days
  Frozen  146 days

Clinical Information

Iodine is an essential element for thyroid hormone production.

 

The measurement of urinary iodine serves as an index of adequate dietary iodine intake.

Reference Values

0-15 years: not established

≥16 years: 26-705 mcg/L

Cautions

Administration of iodine-based contrast media and drugs containing iodine, such as amiodarone, will yield elevated results.

Day(s) Performed

Monday, Tuesday, Wednesday, Friday; 5 p.m.

Report Available

1 day

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

83018

NY State Approved

Yes