A nurse is caring for a client with hypoparathyroidism who is experiencing tetany. Which nursing intervention should be the priority?

The priority intervention for a client with hypoparathyroidism experiencing tetany is to administer prescribed IV calcium gluconate to rapidly correct the hypocalcemia and prevent life-threatening complications such as laryngospasm or cardiac arrhythmias.

Hypoparathyroidism after thyroidectomy occurs when the parathyroid glands are unintentionally damaged or removed during surgery, leading to decreased production of parathyroid hormone (PTH). PTH is essential for maintaining calcium homeostasis by promoting calcium absorption in the intestines, increasing reabsorption in the kidneys, and releasing calcium from bones. When PTH levels drop, serum calcium levels decrease, resulting in hypocalcemia.

This patient exhibits muscle cramps, perioral tingling, a positive Chvostek's sign, and a serum calcium level of 7.2 mg/dL (normal: 8.5-10.5 mg/dL), indicating severe hypocalcemia with tetany. Tetany refers to neuromuscular hyperexcitability due to low ionized calcium levels and can progress to life-threatening complications such as laryngospasm, bronchospasm, seizures, and cardiac arrhythmias.

The priority nursing intervention is the immediate administration of prescribed intravenous calcium gluconate. This intervention directly increases serum calcium levels, rapidly correcting hypocalcemia. Calcium gluconate is preferred over calcium chloride because it causes less tissue irritation and has a lower risk of tissue necrosis if extravasation occurs. It should be administered slowly (usually over 10-20 minutes) to prevent bradycardia or cardiac arrest.

This intervention immediately addresses the underlying pathophysiology and can prevent progression to more severe complications. The nurse should monitor the cardiac rhythm during administration and assess for improvement in neuromuscular symptoms. After acute treatment, ongoing calcium and vitamin D supplementation is necessary to maintain adequate calcium levels.

Understanding the Priority: Acute Hypocalcemic Tetany

The client's presentation—muscle spasms, perioral tingling, a positive Chvostek's sign, and a critically low serum calcium level of 7.2 mg/dL—is a classic manifestation of acute hypocalcemia following a thyroidectomy. This occurs because of postoperative hypoparathyroidism, a predominant and severe complication of thyroid surgery where the parathyroid glands are inadvertently damaged, devascularized, or removed, leading to a sudden drop in parathyroid hormone (PTH) ^[1]. PTH is essential for maintaining calcium homeostasis; without it, serum calcium levels fall precipitously. The resulting neuromuscular excitability manifests as tetany, which can rapidly progress to laryngospasm, seizures, and life-threatening cardiac arrhythmias if not promptly corrected ^[2].

Why Intravenous Calcium is the Priority Intervention

Administering prescribed intravenous calcium gluconate slowly is the correct and immediate priority. In the context of severe, symptomatic hypocalcemia with tetany, oral supplementation is insufficient due to its slow and unreliable absorption. The clinical urgency is to raise the serum ionized calcium level rapidly to stabilize cardiac and neuromuscular cell membranes. Undertreated hypocalcemia can result in cardiac arrhythmias and death, making prompt appropriate treatment the definitive safety intervention ^[2]. The directive to administer it "slowly" is a critical safety parameter to prevent hypercalcemia or cardiac irritation during infusion.

Analysis of Incorrect Options

- Encourage the client to perform deep breathing exercises: This intervention addresses anxiety or a feeling of chest tightness, which can accompany tetany, but it does nothing to correct the underlying biochemical emergency of severe hypocalcemia. It is a supportive measure, not a priority action for a condition with a high risk of decompensation.
- Apply warm compresses to the affected muscles: While this may provide some symptomatic comfort for localized muscle cramping, it is a non-urgent comfort measure. It does not treat the systemic calcium deficit causing the tetany and delays definitive, life-saving pharmacological therapy.
- Increase dietary intake of calcium-rich foods: Dietary modification is a long-term management strategy for chronic, mild hypocalcemia, not an intervention for an acute postoperative crisis. A client in a tetanic state is at risk for dysphagia and aspiration, and the gastrointestinal absorption of dietary calcium is far too slow to reverse a critical drop in serum calcium. Postoperative protocols emphasize prompt recognition and treatment with calcium supplementation, not dietary changes, to prevent adverse events ^[2].