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General
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Clinical Use:
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Approximately 80% of absorbed iodine is excreted in the urine, making it a good marker of the previous day's intake. Thus in a given individual, the level will vary daily and even during the day. Dietary iodine is absorbed through the gut and transported to the thyroid gland [approx. 20%] with most of the remainder excreted in the urine. The thyroid incorporates the iodine into thyroglobulin and releases thyroxine and triodothyronine to the circulation under the control of TSH. If insufficient iodine is present the thyroid responds by swelling and enlargement, eventually forming a visible goitre. |
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Availability:
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Samples are batched and tested once a week. |
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Code:
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UI |
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Handling Instructions (to laboratory):
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Send sample chilled. |
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Hyperlink:
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Reference Interval:
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Urine Iodine >100 ug/L (WHO)
Urine Iodine values below the reference range may not indicate iodine deficiency as changes in dietary intake give rise to marked day to day variations.
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Collection Requirements
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Container:
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Urine Container (URINE), |
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Sample Type:
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See container |
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Minimum Collection Volume:
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5mL |
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Collection Instructions:
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Non-medicare rebateable item. All patients except Public, VA and Pensioners must pay $50.75 upfront. |
Processing Requirements
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Alternate Containers:
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Processing Instructions:
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Aliquot sample into urine tube. |
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Minimum Assay Volume:
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1mL |
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Stability:
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7 days chilled |
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Transport Instructions (to testing laboratory):
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Send sample chilled. |
Testing Locations
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Performed at:
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Section
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Department
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Site
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Contact Phone
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| Special Chemistry |
Biochemistry |
QEII Medical Centre |
6383 4114 |
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Last Updated : 29-10-2021 07:49 |