Iodine, Random Urine

Label Mnemonic: IODUR
Epic code: LAB7409
Downtime form: Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mailout Laboratory
6240-8 RCP
356-8593
Specimen(s):
Random Urine
Specimen Instructions:

Aliquot sample into TWO ARUP metal free transport tube (blue lid).

Collection Medium:
Yellow top round bottom tube (no additive)
Minimum:

Preferred Minimum: 8 mL random urine
Absolute Minimum: 1 mL random urine

Rejection Criteria:

Acid preserved urine. Specimens collected within 72 hours after administration of iodinated or gadolinium-based contrast media. Specimens contaminated with blood or fecal material. Specimens transported in non-trace element-free transport tube (with the exception of the original device).

Turn Around Time:

1–5 days upon receipt at reference laboratory

Reference Range:
Components Reference Interval
Creatinine, Urine - per 24h
Age Male (mg/d) Female (mg/d)
3–8 years 140–700 140–700
9–12 years 300–1300 300–1300
13–17 years 500–2300 400–1600
18–50 years 1000–2500 700–1600
51–80 years 800–2100 500–1400
81 years and older 600–2000 400–1300
Iodine, Urine - per 24h 16 years and older: 93.0–1125.0 microg/d
Iodine, Urine - per volume 16 years and older: 26.0–705.0 microg/L
Iodine, Urine - ratio to CRT 35.0–540.0 microg/g CRT

 

Interpretive Data:

Values greater than 1000 ug/L may indicate dietary excess, but more frequently suggest recent drug or contrast media exposure. Elevated results may be due to skin or collection-related contamination, including the use of collection containers that are not certified to be trace element-free. If an elevated result is suspected to be due to contamination, confirmation with a second specimen collected in a certified trace element-free container is recommended.

Comments:

Recommended 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.

Patient Preparation: 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. Specimen must be collected in a plastic container and should be refrigerated after collection.

Methodology:

Quantitative Inductively Coupled Plasma-Mass Spectrometry

CPT Code:
83789