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
FDA Category
Laboratory Developed Test
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 8 mL | Urine, 24-hour (well-mixed) | Plastic container | Refrigerated | 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. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 8 mL | Urine, random | Plastic container | Refrigerated | 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. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Refrigerated | 2 months |
| Ambient | 2 months |
| Frozen | 2 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 |
| Normal | 35.0-540.0 | ug/g crt | |||
| Iodine, Urine per 24h | |||||
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 15 Years | Normal | Not established | ug/day | 16 Years | 99 Years | Normal | 93.0 - 1125.0 | ug/d |
| Iodine, Urine per Volume | |||||
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 15 Years | Normal | Not established | ug/L | 16 Years | 99 Years | Normal | 26.0 to 705.0 | ug/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.