In which patient will the nurse expect to see a positive Chvostek sign?

Choice A reason: Chronic alcohol abuse may cause hypomagnesemia, which can mimic hypocalcemia symptoms, but a positive Chvostek sign is specific to low calcium. Alcoholism alone is less likely to cause this sign without concurrent hypocalcemia, making this choice incorrect. Choice B reason: Osteoporosis in a 75-year-old involves bone density loss but does not typically cause hypocalcemia or a positive Chvostek sign. Calcium levels are usually normal unless other conditions exist, making this choice incorrect for the expected finding. Choice C reason: Acute hyperparathyroidism can lead to hypocalcemia after parathyroidectomy or in secondary complications, causing a positive Chvostek sign (facial twitching when tapping the facial nerve). Low calcium triggers this neuromuscular response, making this the correct choice. Choice D reason: Severe burns cause fluid shifts and potential electrolyte imbalances, but hypocalcemia is not a primary feature. A positive Chvostek sign is less likely without specific calcium depletion, making this choice incorrect for the expected finding.