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Test Code Billings Clinic: 8049 Mayo: TLB Thallium, Blood

Reporting Name

Thallium, B

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Detecting toxic exposure in whole blood specimens

Method Name

Inductively Coupled Plasma Mass Spectrometry (ICP-MS)


Specimen Required


Patient Preparation: High concentrations of gadolinium and iodine are known to interfere with most metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.

Supplies: Metal Free B-D Tube (EDTA), 6 mL (T183)

Container/Tube: Royal blue top (EDTA) plastic trace element blood collection tube

Specimen Volume: Full tube

Collection Instructions:

1. See Metals Analysis Specimen Collection and Transport for complete instructions.

2. Send specimen in original tube. Do not aliquot.


Specimen Type

Whole blood

Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole blood Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Reference Values

0-17 years: Not established

≥18 years: <2 ng/mL

Interpretation

Normal thallium blood concentrations are less than 1 ng/mL.

 

Significant exposure is associated with thallium concentrations in blood greater than 10 ng/mL and as high as 50 ng/mL. The long-term sequelae from such an exposure is poor.

 

Patients exposed to high doses of thallium (>1 g) present clinically with alopecia (hair loss), peripheral neuropathy, seizures, and kidney failure

Day(s) Performed

Tuesday, Friday

Report Available

2 to 5 days

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

83018

LOINC Code Information

Test ID Test Order Name Order LOINC Value
TLB Thallium, B 5743-0

 

Result ID Test Result Name Result LOINC Value
8149 Thallium, B 5743-0