How to Care for Patients with Recurrent Laryngeal Nerve Paralysis

Recurrent laryngeal nerve (RLN) palsy is a neurological condition characterized by impaired function of the recurrent laryngeal nerve—a branch of the vagus nerve (Cranial Nerve X)—which innervates most intrinsic laryngeal muscles, including the vocal folds. This impairment can result in vocal fold immobility, leading to voice changes, dysphagia, aspiration risk, and, in severe bilateral cases, airway obstruction.

Clinical presentation varies depending on whether the palsy is unilateral or bilateral. Unilateral RLN palsy typically presents with hoarseness, breathy voice quality, reduced vocal projection, and mild aspiration—especially with thin liquids. Bilateral involvement may cause stridor, shortness of breath on exertion, and acute upper airway compromise requiring urgent intervention. Etiologies include iatrogenic injury (e.g., during thyroidectomy, parathyroid surgery, or cardiothoracic procedures), malignancy (particularly tumors of the mediastinum, lung apex, or thyroid), viral neuropathies, autoimmune conditions, and idiopathic causes.

Management begins with thorough evaluation: flexible laryngoscopy to assess vocal fold position and mobility; imaging (CT or MRI) to identify structural lesions along the nerve’s course; and, when indicated, pulmonary function testing or videofluoroscopic swallow study to quantify aspiration risk. Voice therapy led by a certified speech-language pathologist is first-line for unilateral palsy, focusing on vocal efficiency, breath support, and compensatory strategies. For persistent glottic insufficiency causing significant dysphonia or aspiration, medialization laryngoplasty or vocal fold injection may be considered.

In bilateral RLN palsy, airway stability takes precedence. Temporary measures such as tracheostomy or endoscopic cordotomy may be necessary. Definitive surgical options—including arytenoid abduction or posterior cricoarytenoid muscle reinnervation—are reserved for carefully selected patients after multidisciplinary assessment involving otolaryngology, neurology, and pulmonary medicine.

Ongoing monitoring is essential: serial laryngoscopic exams to detect spontaneous recovery (which occurs in up to 50% of idiopathic or post-surgical cases within 6–12 months), reassessment of swallowing safety, and vigilance for signs of underlying malignancy. Patients should avoid smoking, limit vocal strain, and receive prompt evaluation for new or worsening respiratory or voice symptoms.