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The ACTH test (also called the cosyntropin, tetracosactide, or Synacthen test) is a medical test usually requested and interpreted by endocrinologists to assess the functioning of the adrenal glands' stress response by measuring the adrenal response to adrenocorticotropic hormone (ACTH; corticotropin) or another corticotropic agent such as tetracosactide (cosyntropin, tetracosactrin; Synacthen ...
Adrenocorticotropic hormone is used as a medication and as diagnostic agent in the ACTH stimulation test. [ 1 ] [ 2 ] : 316, 1165 [ 3 ] : 84, 271 The form that is purified from pig pituitary glands is known as corticotropin [ 1 ] [ 2 ] : 316 is a medication and naturally occurring polypeptide tropic hormone produced and secreted by the anterior ...
by increased plasma angiotensin II, ACTH, or potassium levels. The ACTH stimulation test is sometimes used to stimulate the production of aldosterone along with cortisol to determine if primary or secondary adrenal insufficiency is present. by plasma acidosis. by the stretch receptors located in the atria of the heart.
Both random total cortisol levels, total cortisol levels or increment after ACTH stimulation tests, free cortisol levels, or a combination of these have been proposed as diagnostic tests. Other stimulation tests for adrenal insufficiency which are used in non-critical patients, such as the test using metyrapone or a test which employs insulin ...
To determine the origin of dysfunction, the ACTH stimulation test is the best initial test as it can differentiate between primary and secondary adrenal insufficiency. [2] If cortisol levels remain low following ACTH stimulation, then the diagnosis is primary adrenal insufficiency. [2]
A low-dose ACTH stimulation test has been suggested as a sensitive test for secondary adrenal insufficiency diagnosis. [10] When compared to insulin tolerance testing [11] and the high-dose ACTH test, this test allows for a more accurate identification of patients with secondary adrenal insufficiency. [12]
An ACTH stimulation test involving administration of corticotropin-releasing hormone (CRH) or another agent can differentiate this condition from ectopic ACTH secretion. In a patient with Cushing's disease, the tumor cells will be stimulated to release corticotropin and elevated plasma corticotropin levels will be detected. [ 8 ]
The corticorelin stimulation test helps to differentiate between the causes for adrenocorticotropic hormone (ACTH)-dependent hypercortisolism.It is used to distinguish a pituitary source of excessive ACTH secretion from a different source.