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Cortisol - Blood

Source Blood
Mnemonic

Morning:    CORTAM
Afternoon: CORTPM
Random:    CORT 

If Dexamethasone Suppression Test is ordered, use CORT mnemonic for each collection.

If "Oncology Cortisol" is ordered, see Oncology Cortisol.

Specimen Requirements

1 x 3 mL or 4.5 mL light green (mint) top PST tube. Gold top SST tube also acceptable.

0.5 mL plasma or serum

Minimum Whole Blood Volumes for Microcollections

Morning specimens should be collected between the hours of 07:00 and 10:00.
Afternoon specimens should be collected between the hours of 15:00 and 18:00.
Specimens collected outside of these time intervals should be ordered as Random.
Morning and afternoon specimens may be collected on different days.

Specimen Handling Indicate time of collection on requisition
Additional Information FMC tests only Random Cortisol; DSC tests random, AM and PM Cortisol samples.
Testing Location Chemistry-DSC, FMC
Testing Frequency Daily
Alternate Name(s)  
Reference Interval
CORTAM

170-500 nmol/L

CORTPM

75-285 nmol/L

CORT none