What is the normal finding for Dexamethasone Suppression (DS, Prolonged/Rapid DS, Cortisol Suppression, Adrenocorticotropic Hormone [ACTH] Suppression) in the Rapid (Overnight) Method?

Rationale

<5 µg/dL

In the Rapid (Overnight) Dexamethasone Suppression Test, a normal finding is a cortisol level of less than 5 µg/dL, indicating adequate suppression of cortisol production by the adrenal glands in response to dexamethasone administration.

A (<10 µg/dL) YOUR ANSWER

While a cortisol level lower than 10 µg/dL may suggest some degree of suppression, it does not meet the specific criteria for a normal finding in the Rapid Dexamethasone Suppression Test. The threshold for normal suppression is set below 5 µg/dL, making this option insufficient for a definitive normal result.

B (<5 µg/dL) CORRECT

This option correctly indicates the normal finding for cortisol levels in the Rapid Dexamethasone Suppression Test. A cortisol measurement under 5 µg/dL demonstrates that the dexamethasone has effectively suppressed cortisol production, which is a crucial indicator of normal adrenal function.

C (<0.1 µg/dL) YOUR ANSWER

A cortisol level of less than 0.1 µg/dL is unusually low and may suggest an abnormal response rather than a normal finding. Such a low level could indicate adrenal insufficiency or an excessive response to dexamethasone that would not be expected in a healthy individual undergoing this test.

D (<2 µg/dL) YOUR ANSWER

Although a cortisol level below 2 µg/dL may indicate suppression, it is not the established threshold for a normal finding in the Rapid Dexamethasone Suppression Test. The cutoff for normal suppression is specifically <5 µg/dL, making this option also insufficient for a normal result.

Conclusion

The Rapid Dexamethasone Suppression Test is a critical assessment for evaluating adrenal function, specifically in the context of cortisol production. A cortisol level of less than 5 µg/dL signifies normal suppression, indicating appropriate adrenal response to dexamethasone. The other options either exceed this threshold or present atypical values, emphasizing the importance of adhering to established diagnostic criteria for accurate evaluation.

What is the normal finding for Dexamethasone Suppression (DS, Prolonged/Rapid DS, Cortisol Suppression, Adrenocorticotropic Hormone [ACTH] Suppression) in the Rapid (Overnight) Method?

<5 µg/dL

Related Questions

Related Quizzes

How familiar were you with this question?

Report an Issue

Rate this Practice Test