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Test & Collection Guide

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Cortisol - blood

Laboratory:
Biochemistry
Test Code:
CORT
Specimen types:
Serum
Container types:
Serum tube with gelSerum tube with gel
Collection Instructions:
Transport specimen at Room Temperature to lab

Cortisol can be collected at any time of the day. Multiple collections in one day are sometimes helpful.

If the requesting doctor specifies "morning cortisol/"AM cortisol", the preferred collection period is between 0800 - 1000 hrs.    "Afternoon cortisol"/"PM cortisol" is best collected between 1600 - 1700 hrs.

If there is any doubt do not send the patient away without documented consultation with a senior scientist. (9895 3471)

If request is in the context of a "dexamethasone suppression test" or "Short Synacthen Test" refer to these entries in this handbook for specific instructions

Minimum Adult Volume:
2 mL
Notes:

Endocrine consultation is suggested for dynamic testing

Frequency:
Daily
Result Turnaround Time:
5 hours
Reference Interval:

 

Morning (6-10 am) 133-537 nmol/L
Afternoon(4-8pm) 68-327 nmol/L