Final answer:
The nurse should report increased blood pressure as an adverse effect of mannitol administration in a client with increased intracranial pressure (ICP).
Step-by-step explanation:
The nurse should report increased blood pressure as an adverse effect of mannitol administration in a client with increased intracranial pressure (ICP). Mannitol is an osmotic diuretic that works by creating an osmotic force in the renal tubules, leading to increased urine output and decreased intracranial pressure. However, it can also cause fluid shifts, leading to increased blood volume and subsequently increased blood pressure: