Casandra
Casandra Test Code QD08634Version 1 (DRAFT)
Performing Lab
ADmark® Phospho‑Tau/Total‑Tau/A Beta42, Analysis and Interp, CSF (Symptomatic)
Clinical Use
Order TestUse
Correlates levels of Phosphorylated‑Tau protein, Total‑Tau protein and Aβ42 peptide in cerebrospinal fluid (CSF), aiding in evaluation of Alzheimer’s disease pathology in symptomatic patients.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Immunoassay (ELISA)
Biomarkers
Aβ42
AnalyteConcentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Phosphorylated‑Tau
ProteinConcentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Total‑Tau
ProteinConcentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
7-14 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Cerebrospinal Fluid
Volume
2 mL
Minimum Volume
0.5 mL
Container
Polypropylene transfer tube
Collection Instructions
Label each specimen tube with two forms of patient identification; these must also appear on the requisition form.
Causes for Rejection
Tubes other than polypropylene; CSF specimens with cell count >500 erythrocytes/mm3
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 hours |
| Refrigerated | 21 days |
| Frozen | 4 months |