What clinical manifestations should the nurse expect in a client who develops SIADH after surgical clipping of a cerebral aneurysm?

In a client who develops Syndrome of Inappropriate Antidiuretic Hormone secretion (SIADH) after surgical clipping of a cerebral aneurysm, the clinical manifestations primarily include hyponatremia and decreased urine output.

SIADH leads to the excessive release of antidiuretic hormone (ADH), which promotes water retention in the body. As the kidneys reabsorb more water, the blood becomes diluted, resulting in lower sodium levels (hyponatremia). This condition is often associated with symptoms such as confusion, weakness, and seizures due to the low sodium levels. Additionally, the increased reabsorption of water leads to a decrease in urine output, as the body retains more fluid rather than excreting it.

Understanding these physiological processes is crucial, particularly in the context of recent surgical procedures on the brain, where the risk of developing SIADH can be heightened due to manipulations or trauma to the hypothalamus or pituitary gland. The other options do not align with the expected outcomes of SIADH, as they reference conditions or symptoms that are inconsistent with the effects of increased ADH in the body.