Test Results For:
Adrenocortotropin Hormone (ACTH)-Midnight
Test Overview
- Test Name
-
Adrenocortotropin Hormone (ACTH)-Midnight
- Test Code
- ACTH-MIDNIGHT
Short Description
Adrenocortotropin Hormone (ACTH)-Midnight
Test Name
Adrenocortotropin Hormone (ACTH)-Midnight
Test Code
ACTH-MIDNIGHT
Category
Immunoassay
TAT
Main Lab:
12
Hour(s)
Family Site:
<12hrs
Specimen(s)
1 x Venous blood - 5 mL Tube - Lavender - EDTA Plasma
Specimen Type
EDTA Plasma
Specimen Format
Tube
Specimen Colour
Lavender
Specimen Volume
5 mL
Sampling Order
4
Origin
Venous blood
Collection Time after baseline
-
Transport Temperature
-80°C
Accepted Other Specimens
-
TAT
Main Lab:
12
Hour(s)
Family Site:
<12hrs
Test Stability
Room Temp:
2 Hour(s)
2–8°C:
5 Hour(s)
Clinical Interest
ACTH (adrenocorticotropic hormone) measurement is indicated in the evaluation of adrenal and pituitary disorders.
In the diagnosis of Cushing's syndrome, it is used to differentiate between ACTH-dependent causes (e.g. pituitary adenoma, ectopic ACTH production) and ACTH-independent causes (e.g. adrenal tumours).
- In Addison's disease, low cortisol levels with high ACTH indicate primary adrenal insufficiency.
- In hypopituitarism, low ACTH with low cortisol suggests secondary adrenal insufficiency due to pituitary dysfunction.
- It helps to differentiate the causes of hypercortisolism by determining whether the excess cortisol is due to pituitary or ectopic secretion of ACTH.
Clinical Information Required
-
Patient Collection Note
Collection around midnight
Immediately after collection, place the tube in an ice bath.
LOINC Code
092-1, 48092-1
Outwork
No