A nurse is preparing to administer mannitol IV to a client. The nurse should monitor the client for which of the following manifestations as an expected outcome of this medication?

A. "Decreased thyroxine levels": Mannitol does not affect thyroxine levels. It is an osmotic diuretic used to reduce fluid buildup, not to influence thyroid function or hormone levels. B. "Correction of atrial flutter": Mannitol is not used to treat arrhythmias such as atrial flutter. It works to decrease intracranial pressure or reduce fluid retention but has no direct effect on heart rhythm abnormalities. C. "Reduced intracranial pressure": Mannitol is used to reduce intracranial pressure by drawing fluid out of the brain. This effect helps treat conditions like cerebral edema or increased pressure from head injuries or other neurological issues. D. "Increased hemoglobin levels": Mannitol does not directly affect hemoglobin levels. Its primary role is in reducing fluid volume and intracranial pressure, not in impacting red blood cell production or hemoglobin levels.