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TTR DNA Sequencing Test
Test Code14759
CPT Codes
81404
Preferred Specimen
8 mL whole blood collected in an EDTA (lavender-top) tube
Minimum Volume
6 mL
Instructions
Physician Attestation of Informed Consent - This germline genetic test requires physician attestation that patient consent has been received. Non-critical.
Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form. Higher blood volumes ensure adequate DNA quantity, which varies with WBC, specimen condition, and need for confirmatory testing.
Specimen Note: DNA yields and quality are better in fresh specimens. However, when necessary, most genetic tests are successful from DNA purified from whole blood that is several days old.
Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form. Higher blood volumes ensure adequate DNA quantity, which varies with WBC, specimen condition, and need for confirmatory testing.
Specimen Note: DNA yields and quality are better in fresh specimens. However, when necessary, most genetic tests are successful from DNA purified from whole blood that is several days old.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 10 days
Refrigerated: 10 days
Frozen: Unacceptable
Refrigerated: 10 days
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Received frozen
Methodology
Sanger Sequencing
FDA Status
This test was developed and its performance characteristics have been determined by Athena Diagnostics. Performance characteristics refer to the analytical performance of the test.
Setup Schedule
Set up: As needed; Report available: 28-42 days
Report Available
28 Days
Reference Range
See Laboratory Report
Clinical Significance
Detects sequence variants in the Transthyretin (TTR) gene.
