Casandra
Casandra Test Code QD81982Version 1 (DRAFT)
Performing Lab
Amino Acid Analysis, Limited, Plasma
Clinical Use
Order TestUse
Used for quantitation of selected amino acids in plasma to aid in clinical evaluation—typically for metabolic disorders or nutritional assessment.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Mass Spectrometry
Biomarkers
6 targets
IsoleucineLeucinePhenylalanineTryptophanTyrosineValine
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Plasma
Volume
2 mL preferred
Minimum Volume
0.25 mL
Container
sodium or lithium heparin (green-top) tube or EDTA (lavender-top) tube
Collection Instructions
Collect plasma after an overnight fast (or at least 4 hours after a meal); separate as soon as possible; freeze plasma below -20 °C; include date of collection and age of patient
Patient Preparation
Fasting required (overnight or ≥4 h post-meal); age required
Causes for Rejection
Gross hemolysis; room temperature receipt
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 7 days |
| Frozen | 28 days |