Ordering Guidance

Mayo Clinic Laboratory Director/Consultant approval is required prior to ordering this test in patients greater than 40 years of age.

Additional Testing Requirements

Additional tests that could be ordered in conjunction with this test include:

-TRECS / T-Cell Receptor Excision Circles (TREC) Analysis, Blood

-CD4RT / CD4 T-Cell Recent Thymic Emigrants, Blood

-TCP / T-Cell Subsets, Naive, Memory, and Activated, Blood

Shipping Instructions

Specimens must be received in the laboratory on weekdays and by 4 p.m. on Friday. Collect and package specimen as close to shipping time as possible.

It is recommended that specimens arrive within 24 hours of collection.

Samples arriving over the weekend and/or on observed holidays may be canceled.

Necessary Information

Ordering physician's name and phone number are required.

TCR V beta Spectratyping Assay Patient Information (T719) is required. Testing will proceed without the form; however, results will be held under the information is received.

Specimen Required

For serial monitoring, it is recommended to perform specimen collection at the same time of day, if possible.

Supplies: Ambient Shipping Box-Critical Specimens Only (T668)

Specimen Type: Blood

Container/Tube: Lavender top (EDTA)

Specimen Volume:

Adults: 10 mL

Pediatrics:

-Preferred volume for >1 year: 3 mL

-Preferred volume for ≤1 year: 1 mL

Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.