Test Details
Methodology
Inductively-coupled plasma/mass spectrometry (ICP/MS)
Result Turnaround Time
3 - 5 days
Use
Monitor exposure to iodine; evaluate for iodine deficiency disorders (IDDs), excessive iodine intake, or iodine in the workplace
Age Groups | Health Consequences of Iodine Deficiency |
|---|---|
Zimmerman MB, "Iodine Deficiency," Endocrine Reviews, The Endocrine Society, 2009, 30:376-408. | |
All ages | Goiter Increased susceptibility of thyroid gland to nuclear radiation |
Fetus | Abortion Stillbirth Congenital anomalies Perinatal mortality |
Neonates | Infant mortality Endemic cretinism |
Children and adolescents | Impaired mental function Delayed physical development |
Adults | Impaired mental function Reduced work productivity Toxic nodular goiter; iodine-induced hyperthyroidism Increased occurrence of hypothyroidism in moderate-to-severe iodine deficiency; decreased occurrence of hypothyroidism in mild-to-moderate iodine deficiency |
Other forms of thyroid problems, namely iodine-induced hypothyroidism, autoimmune thyroiditis, and hyperthyroidism associated with excessive iodine intake, have become a greater concern than deficiency disorders.1
Special Instructions
If 24-hour urine is submitted, the test request form must state 24-hour collection volume.
Specimen Requirements
Specimen
Urine (24-hour)
Volume
5 mL
Minimum Volume
2 mL
Container
Plastic urine container, no preservative
Storage Instructions
Maintain specimen at room temperature.
Collection Instructions
Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Transport the specimen promptly to the laboratory. Container must be labeled with the patient's full name, room number, the date and time collection started, and the date and time collection finished. Do not use preservative.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 14 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Reference Range
100.0−460.0 μg/24 hours
Footnotes
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 070222 | Iodine, 24 Hr Urine | 2492-7 | 070164 | Iodine, Urine | ug/L | 2495-0 |
| 070222 | Iodine, 24 Hr Urine | 2492-7 | 070223 | Iodine, 24 Hr Urine | ug/24 hr | 2492-7 |
| Order Code | 070222 | |||||
| Order Code Name | Iodine, 24 Hr Urine | |||||
| Order Loinc | 2492-7 | |||||
| Result Code | 070164 | |||||
| Result Code Name | Iodine, Urine | |||||
| UofM | ug/L | |||||
| Result LOINC | 2495-0 | |||||
| Order Code | 070222 | |||||
| Order Code Name | Iodine, 24 Hr Urine | |||||
| Order Loinc | 2492-7 | |||||
| Result Code | 070223 | |||||
| Result Code Name | Iodine, 24 Hr Urine | |||||
| UofM | ug/24 hr | |||||
| Result LOINC | 2492-7 |