A nurse in the emergency department is caring for a client who had a seizure and became unresponsive after stating they had a sudden, severe headache. The client's vital signs are as follows: blood pressure of 198/110 mm Hg, pulse of 82/min, respirations of 24/min, and a temperature of 38.2° C (100.8° F). Which of the following neurological disorders should the nurse suspect?

Choice A reason: Instructing the client to perform range-of-motion exercises to his lower extremities immediately after cardiac catheterization is not recommended. The client should maintain bed rest with the affected leg straight to prevent bleeding from the catheter insertion site.

Choice B reason: Ambulating the client 1 hour following the procedure is not advised. After femoral artery access, the client is typically required to remain on bed rest with the affected leg straight for several hours to ensure hemostasis and prevent bleeding².

Choice C reason: Restricting the client's fluid intake is not a standard post-procedure action. Adequate hydration is important after cardiac catheterization to help flush the contrast dye used during the procedure from the body, unless contraindicated.

Choice D reason: Assessing the color, temperature, and pulse in the affected extremity is crucial for detecting signs of bleeding, hematoma formation, or arterial occlusion. These assessments should be performed regularly as part of post-cardiac catheterization care².

Choice A reason: Hypophosphatemia refers to an abnormally low level of phosphate in the blood. The normal range for serum phosphate in adults is typically around 2.5 to 4.5 mg/dL. In the context of acute kidney injury (AKI), the kidneys’ ability to excrete phosphate is impaired, which can actually lead to hyperphosphatemia, not hypophosphatemia. Therefore, while phosphate levels are important to monitor in AKI, hypophosphatemia is not typically expected.

Choice B reason: Hypercalcemia is characterized by an elevated level of calcium in the blood, with the normal range being approximately 8.5 to 10.2 mg/dL. AKI can sometimes be associated with hypercalcemia, particularly if there is extensive tissue breakdown or rhabdomyolysis. However, it is not as commonly expected as hyperkalemia. Hypercalcemia in AKI is more often secondary to other underlying conditions rather than a direct result of the kidney injury itself.

Choice C reason: Hyperkalemia is a common electrolyte imbalance in AKI and refers to a high level of potassium in the blood. The normal range for serum potassium is about 3.5 to 5.0 mEq/L. In AKI, the kidneys’ ability to excrete potassium is compromised, leading to an accumulation of potassium in the blood. This can be life-threatening, causing cardiac dysrhythmias and muscle weakness. Hyperkalemia is a key concern in AKI management and is often expected in this condition. While all the listed electrolyte imbalances can occur in various clinical scenarios, hyperkalemia is the most commonly expected electrolyte disturbance in a patient with acute kidney injury. It is crucial for healthcare providers to monitor and manage electrolyte levels carefully in AKI to prevent complications.

Choice D reason: Hypernatremia means an elevated sodium level in the blood, with the normal range being 135 to 145 mEq/L. While sodium balance can be affected in AKI, hypernatremia is not typically expected. It is more commonly associated with conditions that cause a loss of water or an intake of sodium, such as diabetes insipidus or excessive salt ingestion. In AKI, the focus is often on managing fluid overload rather than sodium excess.