Question: The nurse is caring for a client with possible Cushing's syndrome undergoing diagnostic testing. The health care provider orders lab work and a dexamethasone suppression test. Which parameter is measured with the dexamethasone suppression test? the amount of dexamethasone in the system cortisol levels before and after the system is challenged with a synthetic steroid changes in certain body chemicals, which are altered in depression cortisol levels after the system is challenged