Quest AD-Detect® Phosphorylated tau181(p-tau181), Plasma
Test code
CPT code(s)*
Clinical significance
Test resources
Test FAQ
Details
Methodology
Electrochemiluminescence (ECLIA)
Alternative name(s)
181,Ptau,PhosphoTau-181P,P tau,ptau 181
Specimen requirements | |
|---|---|
| Patient preparation | Dietary supplements containing biotin may interfere in assays and may skew results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation. |
| Preferred specimen(s) | 1 mL plasma collected in an EDTA (lavender-top) tube |
| Minimum volume | 0.5 mL |
| Transport container | Transport tube |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 14 days Refrigerated: 22 days Frozen: 22 days |
| Reject criteria | Hemolysis |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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