A nurse is planning care for a client who has dehydration and hypotension. Which of the following actions should the nurse plan to take?

Choice A reason: Dehydration reduces plasma volume, lowering blood pressure and causing hypotension. Increasing fluid intake restores intravascular volume, improving cardiac output and blood pressure. Oral or intravenous fluids (e.g., isotonic saline) correct electrolyte imbalances, supporting renal perfusion and hemodynamic stability in dehydrated patients. Choice B reason: Elevating the head of the bed may worsen hypotension in dehydrated patients by reducing venous return to the heart, further decreasing cardiac output. In hypovolemic states, a flat or Trendelenburg position is preferred to enhance blood flow to vital organs, counteracting the effects of low plasma volume. Choice C reason: Guided imagery promotes relaxation by reducing sympathetic activity and stress hormones like cortisol. While beneficial for anxiety, it does not address the physiological cause of hypotension in dehydration—low plasma volume. Fluid replacement is required to restore hemodynamic stability, making imagery a secondary, non-urgent intervention. Choice D reason: The Valsalva maneuver increases intrathoracic pressure, reducing venous return and cardiac output, potentially worsening hypotension in dehydrated patients. It is used in specific contexts (e.g., assessing autonomic function) but is contraindicated in hypovolemic states, as it can exacerbate cardiovascular instability and reduce cerebral perfusion.