Test Details
Mnemonic
ALZEC
Ordering Code
3401103
CPT-4 Code(s)
84393, 82234, 84394
Specimen Information
Collect
Cerebrospinal fluid (CSF)
Specimen Preparation
Send 2.5 Cerebrospinal fluid (CSF) in a screw capped polypropylene vial.
Minimum Volume
1.0 mL
Transport Temperature
Refrigerated
Rejection Criteria
Gross hemolysis
Stability
Room temperature: 5 days
Refrigerated: 14 days
Frozen: 56 days
Refrigerated: 14 days
Frozen: 56 days
Methodology
Electrochemiluminescence
Reference Range
Beta-Amyloid (1-42), CSF Not Established pg/mL
tTau, CSF Not Established pg/mL
pTau181, CSF Not Established pg/mL
Ttau/Abeta-42 Ratio < or = 0.28
pTau181/Abeta-42 Ratio < or = 0.023
tTau, CSF Not Established pg/mL
pTau181, CSF Not Established pg/mL
Ttau/Abeta-42 Ratio < or = 0.28
pTau181/Abeta-42 Ratio < or = 0.023
Performing Laboratory
Quest
New York DOH Approval Status
Yes