Casandra
Casandra Test Code QD14878Version 1 (DRAFT)
Performing Lab
Warfarin, Serum/Plasma
Also known as: Coumadin®
Clinical Use
Order TestUse
Quantitative measurement of warfarin in serum or plasma, used for therapeutic drug monitoring to assess anticoagulant levels and guide dosing adjustments in patients receiving warfarin.
Special Instructions
Not provided.
Limitations
Not specified in available content.
Test Details
Methodology
Mass Spectrometry
Biomarkers
Warfarin
AnalyteWarfarin, Serum/Plasma
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
LOINC Codes
Result Codes
- 85403900
Result Turnaround Time
7 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.2 mL
Container
plastic screw‑cap vial
Collection Instructions
Serum collected in red‑top tube (no gel); promptly centrifuge and transfer serum into plastic screw‑cap vial.
Storage Instructions
Transport at room temperature.
Causes for Rejection
Polymer gel separation tube; serum separator tube.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 30 days |
| Refrigerated | 30 days |
| Frozen | 15 months |
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