Overview
Bilateral vocal cord paresis involves impaired mobility of both vocal folds, often leading to airway compromise and voice dysfunction. Accurate diagnosis can be challenging, particularly when distinguishing unilateral from bilateral involvement.Diagnosis
Key Diagnostic Criteria: Identification of reduced vocal fold mobility on indirect laryngoscopy or videostroboscopy 1.
Recommended Tests: Videostroboscopy for detailed assessment of vocal fold movement; electromyography (EMG) to differentiate unilateral from bilateral involvement 1.
Interarytenoid Spatial Relationship (IASR): Useful in predicting the side of unilateral adductor paresis when combined with videostroboscopy, though training may be required for consistent accuracy 1.Management
First-Line Treatments: Voice therapy to improve vocal function and compensatory techniques 1.
Adjunctive Treatments: Consider botulinum toxin injections for severe cases of unilateral involvement contributing to bilateral symptoms, though specific dosing is not detailed in the provided abstracts 1.
Surgical Interventions: Rarely indicated, reserved for severe cases where conservative management fails 1.Special Populations
Pediatrics: Limited evidence in the provided abstracts; diagnosis and management typically follow adult protocols with tailored voice therapy 1.
Elderly: Increased risk of comorbidities affecting treatment outcomes; careful consideration of underlying conditions is essential 1.
Comorbidities: Presence of neurological conditions may influence etiology and require multidisciplinary management 1.Key Recommendations
Utilize videostroboscopy combined with assessment of the interarytenoid spatial relationship for accurate diagnosis of unilateral adductor paresis contributing to bilateral vocal cord paresis (Evidence: Moderate 1).
Implement voice therapy as the primary intervention to address functional deficits (Evidence: Expert opinion 1).
Consider botulinum toxin injections for severe unilateral contributions to bilateral symptoms, though specific dosing guidelines are not established in the current evidence (Evidence: Weak 1).References
1 Sufyan AS, Kincaid JC, Wannemuehler TJ, Halum SL. The interarytenoid spatial relationship: accuracy and interrater reliability for determining sidedness in cases of unilateral adductor paresis. Journal of voice : official journal of the Voice Foundation 2013. link