Casandra
Casandra Test Code QD14865Version 1 (DRAFT)
Performing Lab
Isotretinoin, Serum/Plasma
Clinical Use
Order TestUse
Quantitative measurement of isotretinoin (13‑cis‑retinoic acid, commonly known by the brand Accutane®), used to monitor patient serum or plasma concentrations for therapeutic drug monitoring and to assess compliance or pharmacokinetics.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Mass Spectrometry
Biomarkers
Isotretinoin
AnalyteConcentration (ng/mL) • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.3 mL
Container
Plastic container (preservative‑free)
Collection Instructions
Serum: Collect sample in Red top tube; Plasma: Collect sample in Lavender top tube (EDTA) or Pink top tube.
Storage Instructions
Refrigerated transport; protect from light.
Causes for Rejection
Not received light protected; polymer gel separation tube (SST or PST).
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 30 day(s) |
| Refrigerated | 30 day(s) |
| Frozen | Frozen (-20 °C): 4 month(s), Frozen (-70 °C): 14 month(s) |