A nurse is caring for a client after thyroid surgery who complains of muscle cramps and perioral tingling. The nurse suspects which postoperative complication?

A. Anemia typically presents with clinical manifestations such as pallor, fatigue, tachycardia, and shortness of breath due to decreased oxygen-carrying capacity. It does not cause the neuromuscular excitability associated with the perioral tingling or muscle cramps described in the question stem. Following thyroid surgery, anemia is a less common acute concern than the potential for accidental parathyroid gland trauma. B. Hypermagnesemia results in central nervous system depression, which would manifest as diminished deep tendon reflexes, bradycardia, hypotension, and respiratory depression. It does not cause the muscle irritability or paresthesia reported by the patient in this postoperative scenario. High magnesium levels actually inhibit neuromuscular transmission, leading to muscle weakness and flaccidity rather than the painful cramping observed here. C. Hypocalcemia is a classic postoperative complication of thyroid surgery caused by accidental damage to or removal of the parathyroid glands. Low serum calcium levels increase neuromuscular irritability, resulting in tetany, muscle cramps, and perioral paresthesia, which are hallmark signs of this deficiency. The nurse should immediately assess for positive Chvostek and Trousseau signs to confirm the presence of acute hypocalcemia. D. Hyperglycemia generally presents with the "three Ps" consisting of polyuria, polydipsia, and polyphagia, along with potential blurred vision or delayed wound healing. It is not characterized by the sudden onset of perioral tingling or acute muscle spasms following a neck procedure. While stress can elevate blood glucose, it would not be the suspected cause for the specific neuromuscular symptoms reported by the patient.