- IODINE, URINE
- Start Date
- Expiration Date
- Iodine Excretion, Urinary Iodine
- CPT Codes
- Reference Test
Urine Random or Urine, 24-Hour
Transfer an 8 mL aliquot from a well-mixed collection to ARUP Trace Element-Free Tubes
8.0 mL aliquot from well mixed collection
- Transport Info
- Fasting Required?
- Patient Instructions
If patient has been administered gadolinium-containing contrast media for radiographic studies wait at least 48 hours before starting urine collection
Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, nonessential over-the-counter medications for 48 hours (upon the advice of their physician). In addition, the administration of iodine-based contrast media and drugs containing Iodine may yield elevated results.
To begin collection of timed specimen, have patient urinate, noting date and exact time
Discard this first portion of urine, but document date and time of voiding on container label and test requisition as "start" of timed specimen
Save all urine voided during designated time period, including portion voided at exact end of time period
IMPORTANT: Refrigerate entire specimen (2-8°C) during and after collection to prevent bacterial growth
Document date and time of final voiding on label and requisition as "end" of timed specimen
- Reference Range
Quantitative Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)
Iodine is an essential element for thyroid hormone production. The measurement of urinary iodine serves as an index of adequate dietary iodine intake.