IODINE, 24 HOUR, URINE

Specimen Required
Collect 24 hours urine, refrigerate during collection. Mix well and send 10.0 mL urine (1.0 mL minimum) refrigerated in a screw-capped plastic urine container.
Patient Preparation: High concentrations of gadolinium and iodine are known to interfere with most metals tests. If gadolinium - or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
If this test is used in conjunction with the (131)l uptake test, then specimen collection should begin immediately after the dose of (131)l is given (ie, the patient should void and discard urine just prior to the (131)l, and all subsequent urine should be collected for the next 24 hours). The last void should be included in the collection.

Alternate Specimen
Urine preserved with 50% acetic acid

Methodology
Inductively Coupled Plasma-Mass Spectrometry

Stability
Room Temperature: 146 days; Refrigerated: 146 days; Frozen: 146 days

Reference Range
Iodine, 24 hour urine:
0-17 years:   Not Established  
>=18 years:   75-851 mcg/24 hour  

Performed
Monday, Wednesday, Friday

Turnaround Time3-5 days
Test CodeUIOD
CPT-4 Code (s)
83789
LOINC Codes
Iodine, 24 Hour, Urine   2492-7  
Collection Duration   13362-9  
Urine Volume   3167-4  

Warde
Medical
Laboratory