Test Overview
Test Methodology

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

Test Usage

Detecting toxic thallium exposure.

Reference Range *

Age 0-17 years: not established; age >or= 18 years: <2 mcg/24 hour.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Tuesday, Friday
Analytic Time

2 - 6 days

Soft Order Code
TL-U
MiChart Code
Thallium, Urine
Synonyms
  • THALLIUM, URINE
  • TL CONC
  • TL URINE
  • CONCENTRATION
Laboratory
Sendout
Reference Laboratory
Mayo TLU (8603)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect 24 hour urine in a clean, plastic container with no metal cap or glued insert and no preservative. Aliquot urine into a clean, plastic container with no metal cap or glued insert and refrigerate within 4 hours of completion of collection. Record 24 hour urine volume and collection dates/times on the request form. Collection must take place prior to or 96 hours after administering gadolinium-containing contrast media.

Contraindications
High concentrations of gadolinium and iodine are known to interfere with most metals tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
Normal Volume
10 mL aliquot of 24 hour urine collection
Minimum Volume
1 mL aliquot of 24 hour urine collection
Additional Information

Thallium is a by-product of lead smelting and is found in some depilatories and rodenticides. Thallium is rapidly absorbed via ingestion, inhalation, skin contact, and through mucous membranes. Test sent to Mayo Medical Laboratories.

Billing
CPT Code
83789
Fee Code
32113
Resources