Specimen Requirements

Cortrosyn is available from the pharmacy or Omnicell.

Baseline - REQUIRED (60-minute post dose specimen must also be submitted.)

Baseline

Submit specimen according to guidelines in procedure "Cortisol Stimulation Baseline, LAB2385)

60-Minute Post Dose

Submit only 1 of the following specimens:

Container/Tube:

Preferred: Green-top (lithium heparin) tube

Acceptable: Gold-top serum gel tube or Plain Red-top serum tube, lavender EDTA plasma
Specimen Volume: 170 uL of plasma or serum

Stability: Due to possible evaporation effects, samples and calibrators on the analyzers should be analyzed/measured within 2 hours. Stable for 24 hours at 20‑25 °C, 4 days at 2‑8 °C, 12 months at ‑20 °C (± 5 °C). Freeze only once.

Collection Instructions: Draw post dose specimen 60 minutes after a 0.25 mg dose of Cortrosyn is injected IM.

Note: Label specimen appropriately (60 minutes post Cortrosyn injection).