# A nurse is caring for a client who underwent a total thyroidectomy 8 hours ago. Which assessment finding requires the nurse's immediate attention?

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> subject: Adult Health

## 문제

A nurse is caring for a client who underwent a total thyroidectomy 8 hours ago. Which assessment finding requires the nurse's immediate attention?

## 보기

1. Mild incisional pain rated 4/10 on the pain scale
2. Serosanguineous drainage on the surgical dressing
3. Positive Chvostek's sign and perioral numbness **✔ 정답**
4. Hoarse voice when speaking to family members

**정답: 3**

## 해설

Positive Chvostek's sign and perioral numbness indicate hypocalcemia, a serious complication following thyroidectomy due to inadvertent removal or damage to the parathyroid glands.

After a total thyroidectomy, patients are at risk for several complications, with hypocalcemia being one of the most serious and potentially life-threatening. The parathyroid glands, which regulate blood calcium levels, are located very close to the thyroid gland and can be accidentally removed or damaged during thyroid surgery.

Hypocalcemia typically occurs within 24-72 hours after surgery and presents with signs of neuromuscular irritability. Chvostek's sign (facial muscle twitching when tapping the facial nerve) and perioral numbness are classic early indicators of hypocalcemia. If left untreated, hypocalcemia can progress to tetany, laryngospasm, seizures, and cardiac arrhythmias, all of which can be fatal.

Nurses should immediately assess for other signs of hypocalcemia such as Trousseau's sign, muscle cramps, and tingling in the fingers and toes, and monitor for respiratory distress. Immediate interventions include notifying the physician and preparing to administer calcium gluconate. Continuous cardiac monitoring is essential as severe hypocalcemia can cause cardiac conduction abnormalities.

Early recognition and prompt treatment of hypocalcemia are crucial to prevent progression to more severe complications. Nurses should also monitor serum calcium levels and prepare for emergency interventions if respiratory distress occurs due to laryngospasm.

## 심화 해설

Clinical Context

A client who has undergone a total thyroidectomy is at risk for several postoperative complications, including hemorrhage, airway compromise, recurrent laryngeal nerve injury, and hypocalcemia due to inadvertent removal or devascularization of the parathyroid glands. Transient hypocalcemia is a frequent complication after total thyroidectomy, with permanent hypocalcemia occurring in 1-3% of cases and significantly impacting quality of life [2]. The nurse must prioritize assessment findings that indicate a life-threatening or rapidly progressive condition.

Analysis of Findings

The presence of a positive Chvostek’s sign and perioral numbness are classic clinical manifestations of acute hypocalcemia. These signs indicate increased neuromuscular excitability resulting from low serum calcium levels, a direct consequence of compromised parathyroid function (hypoparathyroidism). If left untreated, this can progress to severe complications such as laryngospasm, tetany, seizures, and cardiac arrhythmias. The other options represent expected or less urgent findings: mild incisional pain is an anticipated postoperative symptom, a small amount of serosanguineous drainage is normal in the early postoperative period, and hoarseness is a common, often temporary, result of surgical edema or manipulation of the recurrent laryngeal nerve.

Pathophysiology and Rationale for Urgency

During a total thyroidectomy, the four small parathyroid glands located on the posterior surface of the thyroid gland can be accidentally removed, traumatized, or have their blood supply disrupted. This leads to a rapid decline in parathyroid hormone (PTH) secretion. PTH is essential for maintaining serum calcium levels by stimulating bone resorption, increasing renal calcium reabsorption, and promoting the activation of vitamin D. A deficiency in PTH results in acute hypocalcemia. The neuromuscular symptoms, such as perioral numbness and a positive Chvostek’s sign (tapping over the facial nerve causing ipsilateral facial muscle contraction), are early indicators of this imbalance and signal a high risk for impending tetany and airway compromise. This makes it the finding requiring the most immediate attention.

Evidence-Based Preventive Context

The significance of this assessment is underscored by extensive research into preventing post-thyroidectomy hypocalcemia. A systematic review and meta-analysis has demonstrated that routine postoperative administration of vitamin D and calcium can effectively reduce the incidence of symptomatic hypocalcemia, highlighting the clinical importance of this complication . The challenge of preserving parathyroid function intraoperatively is the subject of numerous studies, including investigations into parathyroid location techniques [2], and pharmacological interventions like postoperative betamethasone infusion  or topical papaverine application  to mitigate the risk. The fact that multiple high-level studies are dedicated to preventing this specific complication reinforces why its early signs demand the nurse’s immediate recognition and intervention.References (research sources)

- [2]Intraoperative location of parathyroid glands during total thyroidectomy: a systematic review of the literature according to the PRISMA method.Meta-analysis/systematic reviewVialle A, Maheo C, Leclere JC, Marianowski R. (2026) · DOI: 10.1016/j.ando.2026.102585

## 임상 시나리오

Post-Thyroidectomy Hypocalcemia AssessmentRecognizing and Responding to Acute Neuromuscular Irritability
A positive Chvostek's sign (facial muscle contraction upon tapping the facial nerve) and perioral numbness are classic early signs of acute hypocalcemia following thyroid surgery. This indicates increased neuromuscular excitability due to compromised parathyroid function.

Untreated hypocalcemia can rapidly progress to life-threatening laryngospasm, tetany, seizures, and cardiac arrhythmias. Immediate assessment of airway patency and serum calcium levels is the priority.

CautionDo not dismiss perioral numbness or a positive Chvostek's sign as minor. Keep emergency airway equipment and intravenous calcium gluconate readily available at the bedside for immediate intervention.

## 핵심 개념

- **Chvostek's Sign** — A clinical sign of neuromuscular irritability seen in hypocalcemia, elicited by tapping the facial nerve anterior to the ear, resulting in ipsilateral facial muscle contraction.
- **Hypocalcemia** — A condition characterized by low serum calcium levels, which can lead to tetany, seizures, laryngospasm, and cardiac arrhythmias if severe.
- **Total Thyroidectomy** — Surgical removal of the entire thyroid gland, carrying risks of injury to the parathyroid glands and recurrent laryngeal nerves.
- **Parathyroid Glands** — Small glands located on the posterior thyroid that regulate serum calcium; their inadvertent removal or devascularization during thyroidectomy causes hypocalcemia.
- **Laryngospasm** — A sudden, severe spasm of the vocal cords that can cause complete airway obstruction, a life-threatening complication of severe hypocalcemia.

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