Correct Answer: B

Rationale: When using the ABC approach to client care, the nurse should identify that the priority intervention is administering oxygen. In this scenario, the client's oxygen saturation is only 91%, which is below the normal range of 95% and above. Oxygen is essential for adequate tissue perfusion and oxygenation of vital organs. Administering oxygen takes precedence over other interventions to ensure the client's physiological needs are met first. Choice A can be addressed after ensuring adequate oxygenation. Choice C is important for preventing postoperative complications but is not as urgent as addressing oxygen saturation. Choice D is a common postoperative intervention, but in this case, ensuring adequate oxygenation is the priority over IV fluid administration.

Correct Answer: B

Rationale: The correct answer is to monitor the client's skin under the halo vest. This is important to assess for signs of skin issues such as excessive sweating, redness, or blistering, which can lead to skin breakdown and infection. Choice A is incorrect because inspecting the pin site every 4 hours is necessary but not the priority in this case. Choice C is incorrect as it is not essential for two personnel to hold the halo device during repositioning. Choice D is incorrect because applying powder frequently can actually increase the risk of skin issues by clogging pores and causing irritation.

Correct Answer: A

Rationale: A sodium level of 122 mEq/L indicates hyponatremia, which is characterized by decreased deep tendon reflexes. Hyponatremia leads to neurological symptoms such as altered reflexes. Choices B, C, and D are not typically associated with hyponatremia. Positive Trousseau's sign is related to hypocalcemia, hypoactive bowel sounds can be seen in paralytic ileus or decreased peristalsis, and sticky mucous membranes are not specific findings related to sodium imbalances.

Correct Answer: C

Rationale: The correct answer is C: Hypertension. Prednisone, a corticosteroid, can lead to hypertension as an adverse effect. Prednisone can cause sodium and water retention, leading to increased blood pressure. Options A, B, and D are incorrect. Weight loss is not typically associated with prednisone use; instead, weight gain is more common. Hypoglycemia is not a common adverse effect of prednisone; in fact, it can elevate blood sugar levels. Hyperkalemia is also not a typical adverse effect of prednisone; instead, it can cause hypokalemia, or low potassium levels.

Correct Answer: A

Rationale: The correct instruction the nurse should provide is that the medication can cause the client's urine to turn a dark color, which is a harmless effect of carbidopa/levodopa. This is due to the metabolites of levodopa. Immediate relief is not expected after taking the medication because it may take weeks to months to achieve the full therapeutic effect. Taking the medication with a high-protein food is not recommended as protein can interfere with the absorption of levodopa. Skipping a dose of the medication if the client experiences dizziness is incorrect as dizziness may be a side effect of the medication, and doses should not be skipped without consulting a healthcare provider.