Correct Answer: B

Rationale: The priority intervention is administering oxygen. Postoperatively, the client's oxygen saturation should be at or above 95%. Oxygen is essential for tissue perfusion and cellular oxygenation. While managing pain is important, oxygenation takes precedence. Instructing a client about coughing and deep breathing exercises is important for preventing respiratory complications but is not as urgent as addressing low oxygen saturation. Initiating an infusion of 0.9% sodium chloride is a routine postoperative intervention for fluid balance but is not the priority when oxygen saturation is low.

Correct Answer: B

Rationale: The correct answer is B: Respiratory alkalosis. In this scenario, the client is experiencing respiratory alkalosis due to hyperventilation. Hyperventilation leads to excessive loss of carbon dioxide, causing a decrease in hydrogen ion concentration and an increase in pH levels. Choices A, C, and D are incorrect. Respiratory acidosis is characterized by high PaCO2 and low pH. Metabolic acidosis is associated with low HCO3- levels and low pH. Metabolic alkalosis is marked by high HCO3- levels and high pH. In this case, the ABG results indicate respiratory alkalosis.

Correct Answer: A

Rationale: The correct answer is A: Pitting edema of bilateral lower extremities. Pitting edema can indicate fluid overload, which is a potential complication of TPN administration. Choice B, hypoactive bowel sounds, is more indicative of a gastrointestinal issue rather than a complication of TPN. Choice C, weight remaining the same, is expected to remain stable with proper TPN administration. Choice D, diminished lung sounds, is not directly related to TPN administration and is more suggestive of a respiratory issue.

Correct Answer: B

Rationale: A positive Kernig's sign is identified when a client is unable to extend their leg completely without pain after hip flexion. This finding suggests meningeal irritation. Choices A, C, and D do not describe Kernig's sign. Choice A describes a normal plantar reflex, Choice C refers to coordination deficits, and Choice D indicates neck pain and stiffness, which are not related to Kernig's sign.

Correct Answer: A

Rationale: A distended, board-like abdomen should be reported to the provider immediately because it indicates peritonitis, a serious complication of appendicitis resulting from a ruptured appendix. Option B, an elevated WBC count, may indicate infection but is not as urgent as a board-like abdomen. Option C, rebound tenderness over McBurney's point, is a classic sign of appendicitis but does not indicate immediate life-threatening complications. Option D, a slightly elevated temperature, is not as concerning as a distended, board-like abdomen.