Container/Tube: Serum or Plasma
Specimen Volume: 5 mL
Transport Temperature: Refrigerated
Collection Instructions: Spin down immediately. Cortisol levels are generally ordered for an 8 a.m. draw and a 4 p.m. draw to demonstrate diurnal variation. Specimen should be drawn during same 24-hour period.
Stability
| Storage | Temperature | Stability |
| Refrigerated | 2-8 °C (36-46 °F) | ≤ 5 days |
| Frozen | -20 °C (-4 °F) | ≤ 4 weeks |
Chemiluminescence Immunoassay
4.5 - 22.7 µg/dL
Note: Normal response should be a morning value within normal range. The p.m. level is normally 50% of a.m. level.
Monday through Sunday
82533