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Test Code LAB7550 Thallium, Blood

Additional Codes

TLB

Useful For

Detecting toxic exposure in whole blood specimens

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Whole blood


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 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
Medical University of South Carolina Note:

On-campus collections: Tube to 99 or deliver to University Extension Hospital Room EH318 
Send original tube, Refrigerated
 
Off-campus collections: 
Do NOT Spin!  Send in original tube.
Specimen to be stored/transported at Refrigerated temp. 

Reference Values

0-17 years: Not established

≥18 years: <2 ng/mL

Day(s) Performed

Tuesday, Friday

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

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

Method Description

The metal of interest is analyzed by inductively coupled plasma mass spectrometry.(Unpublished Mayo method)

Report Available

2 to 5 days

Specimen Retention Time

14 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

Secondary ID

8149