Cortisol, Right IVC
Cortisol, Left IVC
Dexamethasone Suppression Test
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Chemiluminescent Immunoassay (CLIA)
Establish diagnosis of adrenocortical insufficiency, Addison's disease, adrenocortical hypersecretion, or Cushing's disease. Malfunction of any of the organs in the hypothalamus - pituitary - adrenal cortex axis will result in alteration of cortisol levels.
AM: 7.0 - 22.0 mcg/dL; PM: 3.0 - 13.0 mcg/dL.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in SST tube. Blood should be drawn in the morning and late afternoon to evaluate baseline diurnal variation. Time and date of draw must be indicated on requisition.
Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate up to 48 hours or freeze for longer storage. Circulating cortisol levels follow a diurnal pattern. Cortisol values are the highest in the morning and lowest in the evening. A single analysis of serum cortisol is of little diagnostic value because of daily variation. Blood should be drawn in the morning and late afternoon to evaluate baseline diurnal variation. Indicate time and date of draw on requisition.