Cortisol
Department:
Biochemistry
Analytical Range:
3 - 1750 nmol/L
Time Limit for Add on Tests:
4 days
Target Turnaround time:
6 hours
Further Information from LabTestsOnline
Tube Type:
Serum (Gold Top)
Availability:
North Devon District Hospital (24/7)
Interpretation of 9am sample:
Cortisol <170 suggestive of adrenal insufficiency
Cortisol >320 adrenal failure unlikely if no symptoms
Cortisol >420 usually excludes adrenal insufficiency
Special Requirements
Indicate time of sampling
Note medications
Patient preparation:
If taking supplements which contain Biotin (Vitamin B7), do not take in the 8 hours prior to blood test - the concentration present may affect the accuracy of the test.