Useful as a biomarker of chronic thallium exposure. For the assessment of acute exposure, consider Thallium, Whole Blood (0099610).
Quantitative Inductively Coupled Plasma-Mass Spectrometry
Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and non-essential over-the-counter medications (upon the advice of their physician). High concentrations of iodine may interfere with elemental testing. Collection of urine specimens from patients receiving iodinated or gadolinium-based contrast media should be avoided for a minimum of 72 hours post-exposure. Collection from patients with impaired kidney function should be avoided for a minimum of 14 days post-contrast media exposure.
24-hour or random urine collection. Specimen must be collected in a plastic container. ARUP studies indicate that refrigeration of urine alone, during and after collection, preserves specimens adequately if tested within 14 days of collection.
Transfer an 8 mL aliquot from a well-mixed collection to ARUP Trace Element-Free Transport Tubes (ARUP supply #43116). Available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787. (Min: 1 mL)
Refrigerated. Also acceptable: Room temperature or frozen.
Urine collected within 72 hours after administration of iodinated or gadolinium-based contrast media. Acid preserved urine. Specimens contaminated with blood or fecal material. Specimens transported in non-trace element-free transport tube (with the exception of the original device).
Record total volume and collection time interval on transport tube and on test request form.
Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 1 year
|Thallium, Urine - per volume||Effective November 12, 2018
|Thallium, Urine - per 24h||0.0-0.4 µg/d|
|Thallium, Urine - ratio to CRT||Effective November 12, 2018
0.0-2.0 µg/g CRT
|0020473||Creatinine, Urine - per 24h||
Urinary thallium levels may reflect recent or chronic exposure and the presence of thallium in urine after acute exposure may persist for up to several weeks. Concentrations less than 5 µg/L are unlikely to cause adverse health effects while concentrations greater than 500 µg/L have been associated with clinical poisoning. After severe thallium poisoning reported symptoms have varying times of onset and include gastroenteritis, multi-organ failure and neurologic injury. Peripheral neuropathy and alopecia are well-documented effects of acute and chronic exposure. Human health effects from low level thallium exposure are unknown.
Per 24h calculations are provided to aid interpretation for collections with a duration of 24 hours and an average daily urine volume. For specimens with notable deviations in collection time or volume, ratios of analytes to a corresponding urine creatinine concentration may assist in result interpretation.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0020207||Creatinine, Urine - per volume||2161-8|
|0020208||Creatinine, Urine - per 24h||2162-6|
|0025021||Thallium, Urine - per 24h||5746-3|
|0025022||Thallium, Urine - per volume||21558-2|
|0025049||Thallium, Urine - ratio to CRT||29938-8|
- Normalized Urine Thallium
- Thallium/Creatinine Ratio, Random, Urine
- Tl Urine
- Urine thallium concentration