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Requisites
Measures

Number of red blood cells in the blood

Identifies

Red blood cell disorders

Measures: Number of red blood cells in the blood

Identifies: Red blood cell disorders

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What is the maximum days the report can be obtained for the test

Maximum Days for Obtaining Report:

  • This test typically requires an overnight stay in a healthcare facility.
  • The results of the Cortisol Suppression by Dexamethasone Test, Overnight High Dose can usually be obtained within 1-2 days after the test is completed.
  • In some cases, it may take up to 3 days to receive the final report depending on the laboratory's workload and processing time.
  • Patients should consult with their healthcare provider for specific information on when they can expect to receive their test results.

What are the prerequisites for the test Cortisol Suppression by Dexamethasone Test, Overnight High Dose

  • Patients must fast for at least 8 hours prior to the test.
  • Patients should avoid strenuous exercise, smoking, and alcohol consumption for 24 hours before the test.
  • Patients should inform their healthcare provider of any medications they are taking, as certain medications can interfere with the test results.
  • Pregnant women should not undergo this test unless absolutely necessary, as it may pose risks to the fetus.

What are the measure values for the test Cortisol Suppression by Dexamethasone Test, Overnight High Dose

Measure Value
Baseline Cortisol Level 100-200 nmol/L
Post-Dexamethasone Cortisol Level <50 nmol/L

What does this test Cortisol Suppression by Dexamethasone Test, Overnight High Dose identify?

Cortisol Suppression by Dexamethasone Test, Overnight High Dose

What does this test identify?

The Cortisol Suppression by Dexamethasone Test, Overnight High Dose is a diagnostic test used to identify the presence of conditions such as Cushing's syndrome or other disorders of the adrenal gland.

During this test, the patient is given a high dose of dexamethasone, a synthetic glucocorticoid that suppresses the production of cortisol in the body. The next morning, a blood sample is taken to measure the cortisol levels. A normal response would show suppressed levels of cortisol, indicating proper functioning of the adrenal gland. Abnormal results, such as elevated cortisol levels, may indicate an underlying condition affecting cortisol production.

This test helps healthcare providers determine the cause of abnormal cortisol levels and guide further treatment decisions.

Why is this test Cortisol Suppression by Dexamethasone Test, Overnight High Dose taken?

Reason for Cortisol Suppression by Dexamethasone Test, Overnight High Dose

Reason for Test:

The Cortisol Suppression by Dexamethasone Test, Overnight High Dose is taken to evaluate the function of the adrenal glands and to diagnose conditions related to cortisol levels in the body.

Specific Reasons for the Test:

  • To diagnose Cushing's syndrome, a condition characterized by high levels of cortisol in the body.
  • To differentiate between Cushing's syndrome and other conditions that may cause similar symptoms.
  • To monitor treatment effectiveness in patients with Cushing's syndrome.
  • To assess the function of the pituitary gland, which controls cortisol production in the adrenal glands.

The test involves taking a high dose of dexamethasone, a synthetic steroid similar to cortisol, and measuring cortisol levels before and after the medication is administered. A decrease in cortisol levels after dexamethasone intake indicates normal suppression of cortisol production, while persistent high levels may suggest an underlying adrenal or pituitary disorder.

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