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HelpTest ID BLOD1794 AD-Detect™ ABeta 42/40 and p-tau217 Evaluation, Plasma
Specimen Type/Requirements
K2 Lavender top (EDTA) tube - Plasma
Collect blood into a K2 EDTA (lavender-top tube) and mix by inversion 10 times. Centrifuge to separate plasma from cells within 1 hour of collection. Carefully transfer plasma into 2 separate polypropylene aliquot tubes. Do not transfer to conical tubes. Store and ship frozen.
Test is affected by hemolysis.
Patients should be cautioned to stop biotin consumption at least 72 hours prior to collection of a sample.
Quest Diagnostics does not perform this test for individuals under the age of 18.
Specimen Volume
| Preferred Volume | 2.5 mL total plasma, split into two equal aliquots |
|---|---|
| Minimum Volume | 1.2 mL |
Stability/Transport
| Room Temperature | Not acceptable | |
|---|---|---|
| Refrigerated | 72 hours | |
| Frozen | 28 days | Preferred for transport |
Performed Test Frequency
Monday through Saturday morning
Report Available
6-8 days
Methodology
Immunoassay, LC/MS/MS
Performing Lab
Quest Chantilly forwards to Quest Diagnostics Nichols Inst San Juan Capistrano
CPT
82233
82234
84393
Interface Build Information
| Result Code | Result Code Description |
|---|---|
| 29477 | INTERPRETATION |
| 29478 | ABETA 42 |
| 29479 | ABETA 40 |
| 29480 | ABETA 42/40 RATIO |
| 29481 | AD DETECT P-TAU217, P |
| 29482 | AD DETECT LIKELIHOOD SCORE |