Beta Amyloid 42/40 Ratio; Phosphorylated Tau 181 (pTau-181); Neurofilament Light Chain (NfL)
This test currently is not available in New York state.
7 - 10 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Plasma, frozen
3 mL
2.5 mL (Note: This volume does not allow for repeat testing.)
Lavender-top (EDTA) tube, screw-capped frozen transport tube
Draw blood into an EDTA tube. Separate plasma from blood via centrifugation (>1500 g for 10 minutes) within 40 minutes after blood collection. Transfer EDTA to a Labcorp polypropylene transport tube and seal.
Plasma samples may be stored for up to six hours at 2°C to 8°C prior to placing in dry ice (for shipment) or an ultra-low freezer transfer (< -60°C).
Do not freeze samples at -20°C; analyte stability is not preserved.
Freeze.
Temperature | Period |
---|---|
Room temperature | Unstable (stability provided by manufacturer or literature reference) |
Refrigerated | Unstable (stability provided by manufacturer or literature reference) |
Frozen | 14 days (stability provided by manufacturer or literature reference) |
This profile is used to assist in determining the presence or absence of key biological changes that are consistent with Alzheimer's disease pathology.
These tests were developed and their performance characteristics determined by Labcorp. They have not been cleared or approved by the Food and Drug Administration.
Sysmex chemiluminescence enzyme immunoassay (CLEIA) and Roche Diagnostics electrochemiluminescence immunoassay (ECLIA)
Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
---|---|---|---|---|---|---|
484400 | ATN Profile | 484403 | A -- Beta-amyloid 42/40 Ratio | Pending | ||
484400 | ATN Profile | 484406 | Beta-amyloid 42 | pg/ml | Pending | |
484400 | ATN Profile | 484408 | Beta-amyloid 40 | pg/ml | Pending | |
484400 | ATN Profile | 484404 | T -- p-tau181 | pg/mL | Pending | |
484400 | ATN Profile | 484405 | N -- NfL, Plasma | pg/mL | 101281-4 | |
484400 | ATN Profile | 484119 | ATN SUMMARY[1] | N/A | ||
484400 | ATN Profile | 484407 | Information: | N/A |
Reflex Table for ATN SUMMARY[1] | ||||||
---|---|---|---|---|---|---|
Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
Reflex 1 | 484401 | ATN SUMMARY[1] | 484401 | ATN SUMMARY[1] | Pending |
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