The nurse is caring for a patient with emphysema and respiratory failure who is receiving mechanical ventilation through an endotracheal tube. To prevent ventilator-associated pneumonia (VAP), which action is most important to include in the plan of care?

Choice A reason: Instructing the client to exercise the fingers and wrist is not the immediate priority. While maintaining mobility is important in burn care, the absence of a radial pulse indicates a potential vascular compromise that needs urgent attention.

Choice B reason: Calling the healthcare provider to report the loss of the radial pulse is the correct and immediate action. The absence of a radial pulse suggests that the edema is causing compartment syndrome, which can lead to tissue ischemia and necrosis if not promptly treated. This is a medical emergency requiring immediate intervention, possibly including a fasciotomy to relieve pressure.

Choice C reason: Continuing to assess the arm every hour for additional changes is important, but it is not the immediate priority. The absence of a radial pulse indicates a critical issue that needs immediate reporting and intervention, rather than waiting for further changes.

Choice D reason: Administering morphine IV can help manage the client's pain, which is significant at 8/10. However, it does not address the underlying issue of the absent radial pulse and potential compartment syndrome. Pain management is important but secondary to resolving the vascular compromise.

Choice A reason: The regulation of water balance by the kidneys involves maintaining the appropriate volume and concentration of body fluids. By taking daily weights, nurses can assess fluid retention or loss, while monitoring intake and output (I&O) helps track fluid balance. Specific gravity measures the concentration of urine, which provides information about the kidneys' ability to concentrate or dilute urine. These interventions directly relate to the kidneys' role in regulating water balance.

Choice B reason: Regulation of acid-base balance by the kidneys involves maintaining the proper pH levels in the blood through excretion or retention of hydrogen ions and bicarbonate. While important, this function is not the primary focus of interventions like daily weights, I&O, and specific gravity monitoring, which are more related to water balance.

Choice C reason: The regulation of blood pressure by the kidneys is achieved through the renin-angiotensin-aldosterone system, which controls blood volume and systemic vascular resistance. Although fluid balance can indirectly affect blood pressure, the specific interventions mentioned are more directly related to water balance than blood pressure regulation.

Choice D reason: Regulation of metabolic wastes involves the kidneys filtering and excreting waste products from the blood. This function is vital for overall health, but interventions like daily weights, I&O, and specific gravity monitoring are more focused on assessing fluid balance rather than directly measuring waste elimination.