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Test Code LAB7795 Interferon Gamma Release Assay (T-SPOT TB)

Performing Laboratory

Quest Diagnostics Laboratory

Methodology

Enzyme linked Immunospot (ELISpot)

Specimen Requirements

Specimen Type: Whole Blood

Container/Tube: Dark green Lithium heparin

Specimen Volume: 6mL

Specimen Minimum Volume: 6mL

Immune compromised patients should have 2 full tubes collected.

Collection Instructions:  

This is a short stability test. 

  • Samples collected between the hours of 0600 and 1800 Monday thru Friday, will be sent out the same day. 
  • Samples collected after 1800 Monday thru Thursday, will be sent out the next day.
  • Samples collected between the hours of 1800 Friday thru 2100 Sunday will be canceled due to stability requirements. 
  • Samples collected after 2100 Sunday will be sent out the next day.  If Monday is a holiday, samples will be canceled due to stability requirements. 

Day(s) Test Set Up

Sent out daily.

Turnaround Time: 2-4 days

Test Classification and CPT Coding

86481

Reference Values

Negative                     

Additional Information

For BJH Laboratory Use Only

Alternate tube: Green with gel separator (Do Not Spin)

Minimum Volume: 6mL

Immune compromised patients should have 2 full tubes collected.

Laboratory Processing Instructions: Do not spin. Deliver to Sendouts

LOINC Code

Name LOINC Code
T-Spot, TB 71773-6