Iodine, Plasma or Serum

CPT CODE:

USEFUL FOR:

Determination of iodine overload
Monitoring iodine levels in individuals taking iodine-containing drugs

SPECIMEN REQUIRED:

Submit only 1 of the following specimens: Plasma1.  Draw blood in a royal blue-top (EDTA) Monoject trace element     blood collection tube, product #8881-307022 (Supply T183).2.  Spin down and send 1 mL of EDTA plasma refrigerated.3.  See "Metals Analysis - Collection and Transport" in Special     Instructions for complete instructions.Note:    1. High concentrations of gadolinium are known to                 interfere with most metals tests. If gadolinium-                 containing contrast media has been administered,                 a specimen cannot be collected for 48 hours.             2. Indicate plasma on request form.             3. Label specimen appropriately (plasma).
Serum1.  Draw blood in a plain, royal blue-top Monoject trace element     blood collection tube, product #8881-307006 (Supply T184).2.  Spin down and send 1 mL of serum refrigerated.3.  See "Metals Analysis - Collection and Transport" in Special     Instructions for complete instructions. Note:    1. High concentrations of gadolinium are known to                 interfere with most metals tests. If gadolinium-                 containing contrast media has been administered,                 a specimen cannot be collected for 48 hours.             2. Indicate serum on request form.             3. Label specimen appropriately (serum).

TRANSPORT TEMPERATURE:

Refrig\Ambient <24 hours OK\Frozen NO

CLINICAL INFORMATION:

Iodine is an essential element that is required for thyroid hormoneproduction. The measurement of iodine serves as an index of adequate dietary iodine intake and (iodine overload, particularly from iodine-containing drugs such as amiodarone).

CLINICAL INTERPRETATION:

Values between 80 ug/L and 250 ug/L have been reported to indicate hyperthyroidism.
Values >250 ug/L may indicate iodine overload.

REFERENCE VALUES:

40-92 ug/L