A 38-year-old female undergoes thyroidectomy for multinodular goiter. Intraoperatively, the left recurrent laryngeal nerve (RLN) is inadvertently transected. The patient is extubated in the recovery room and develops acute stridor and respiratory distress. What is the most appropriate immediate next step in management?

Explanation

## Clinical Scenario Bilateral RLN injury (one transected intraoperatively, the other at risk from edema or contralateral injury) results in both vocal cords assuming a paramedian position, causing acute airway obstruction. This is a surgical emergency requiring immediate airway management. ## Why Immediate Airway Securing is Correct **Key Point:** Acute stridor and respiratory distress after bilateral RLN injury indicate airway compromise that cannot be managed medically. Immediate airway control (reintubation or tracheostomy) is life-saving. **High-Yield:** RLN injury consequences: - **Unilateral RLN injury:** Hoarseness, weak cough, aspiration risk (vocal cord in paramedian position) - **Bilateral RLN injury:** Acute airway obstruction (both cords paramedian), stridor, respiratory distress—**SURGICAL EMERGENCY** **Clinical Pearl:** The RLN innervates all intrinsic laryngeal muscles except the cricothyroid (superior laryngeal nerve). Loss of abductor function (posterior cricoarytenoid) leaves cords in a fixed paramedian position, blocking the airway. ## Management Algorithm for Bilateral RLN Injury ```mermaid flowchart TD A[Bilateral RLN injury]:::outcome --> B{Airway compromise?}:::decision B -->|Yes: Stridor, distress| C[Immediate airway control]:::urgent C --> D[Reintubation or tracheostomy]:::action D --> E[Stabilize, then plan definitive repair]:::action B -->|No: Hoarseness only| F[Observe, voice therapy]:::action E --> G[Posterior cordotomy or arytenoidectomy later]:::action ``` **Mnemonic: ABCD of RLN injury** — **A**irway assessment, **B**ilateral involvement check, **C**ontrol airway if compromised, **D**efinitive repair later. ## Why Other Options Fail | Option | Why Wrong | |--------|----------| | **Dexamethasone + epinephrine** | Medical management does NOT reverse RLN paralysis. Useful for croup or anaphylaxis, but here the obstruction is mechanical (cord position), not edema. Delays critical airway control. | | **Immediate RLN repair** | Microsurgical repair is important but AFTER airway is secured. Operating on an unstable, hypoxic patient is unsafe. Repair is done electively once airway is controlled. | | **Lateral neck X-ray** | Imaging delays life-saving intervention. Clinical diagnosis is clear (stridor + known RLN transection). X-ray adds no management value in acute distress. | [cite:Robbins 10e Ch 16, Harrison 21e Ch 85]