A client who has undergone surgery for Cushing's disease is in the postanesthesia care unit (PACU). The nurse notes that the client has a low blood pressure and a high heart rate. What should the nurse prioritize in this situation?

Choice A rationale While notifying the healthcare provider is necessary, it is not the most immediate priority when the patient shows signs of hemodynamic instability. The nurse must first intervene to stabilize the patient's circulatory volume. Postoperative patients who have had surgery for Cushing's disease are at high risk for acute adrenal insufficiency. This occurs because the remaining adrenal tissue may be atrophied and unable to produce sufficient cortisol, leading to a life-threatening addisonian crisis. Choice B rationale Increasing oxygen flow may be supportive, but it does not address the underlying physiological cause of low blood pressure and tachycardia in this specific postoperative context. The primary issue is likely a lack of circulating cortisol and subsequent fluid volume deficit or vasodilation. While maintaining oxygen saturation is part of standard PACU care, it will not correct the hypotension or the potential adrenal crisis that is developing, making it a secondary intervention in this scenario. Choice C rationale Encouraging deep breaths is a standard intervention to prevent atelectasis and improve respiratory function after general anesthesia. However, it is not a priority when the patient is exhibiting signs of shock, such as hypotension and tachycardia. These vital sign changes suggest a cardiovascular or endocrine emergency rather than a primary respiratory problem. The nurse must focus on interventions that will restore blood pressure and ensure adequate organ perfusion to prevent further deterioration. Choice D rationale Administering IV fluids is the priority action to treat hypotension and tachycardia, which are signs of potential acute adrenal insufficiency or hypovolemia. In the absence of high cortisol levels after removing a tumor, the body cannot maintain vascular tone or fluid balance effectively. Rapid fluid resuscitation helps restore circulating volume and blood pressure. Following fluid initiation, the nurse should also prepare to administer parenteral hydrocortisone as ordered to replace the missing adrenal hormones.