IODINE, 24 hour URINE
General Information
HLAB/HOL Code: IODNU
UPHSM LIS Test #: 027544
Schedule:
Testing Time: 1-3 Days
Testing Lab: Mayo
UPHSM LIS Test #: 027544
Schedule:
Testing Time: 1-3 Days
Testing Lab: Mayo
Specimen Info
Only 1 specimen type required, unless otherwise specified
Volume: 10 mL
Temperature: Refrigerated
Tube Type: Urine - 24 hr urine
Collection Info:
Container/Tube: Plastic, 10-mL urine tube or clean, plastic aliquot container with no metal cap or glued insert
24-Hour volume is required
Patient Preparation:
1. High concentrations of gadolinium and iodine are known to interfere with most metal tests. If gadolinium- or iodine-containing contrast media has been administered, wait a minimum of 96 hours before starting collection.
2. If this test is used in conjunction with the (131)I uptake test, then specimen collection should begin immediately after the dose of (131)I is given (ie, the patient should void and discard urine just prior to the (131)I dose, and all subsequent urine should be collected for the next 24 hours). The last void should be included in the collection.
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
Temperature: Refrigerated
Tube Type: Urine - 24 hr urine
Collection Info:
Container/Tube: Plastic, 10-mL urine tube or clean, plastic aliquot container with no metal cap or glued insert
24-Hour volume is required
Patient Preparation:
1. High concentrations of gadolinium and iodine are known to interfere with most metal tests. If gadolinium- or iodine-containing contrast media has been administered, wait a minimum of 96 hours before starting collection.
2. If this test is used in conjunction with the (131)I uptake test, then specimen collection should begin immediately after the dose of (131)I is given (ie, the patient should void and discard urine just prior to the (131)I dose, and all subsequent urine should be collected for the next 24 hours). The last void should be included in the collection.
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
Specimen Acceptability
URINE PRESERVATIVE COLLECTION OPTIONS
Ambient: OK
Refrigerate: Preferred
Frozen: OK
50% Acetic Acid: OK
Boric Acid: No
Diazolidinyl Urea: No
6M Hydrochloric Acid: No
6M Nitric Acid: No
Sodium Carbonate: No
Thymol: No
Toluene: No
Ambient: OK
Refrigerate: Preferred
Frozen: OK
50% Acetic Acid: OK
Boric Acid: No
Diazolidinyl Urea: No
6M Hydrochloric Acid: No
6M Nitric Acid: No
Sodium Carbonate: No
Thymol: No
Toluene: No
Methods
inductively coupled plasma-mass spectrometry (ICP-MS)
Clinical Utilities
Measurement of urinary iodine excretion provides the best index of dietary iodine intake and deficiency is generally indicated when the concentrations are below 100 mcg/L.
CPT Codes
83789
* The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding
is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
Reference Range
0-17 years: not established
> or =18 years: 75-851 mcg/24 hour
> or =18 years: 75-851 mcg/24 hour
