Laser Microsurgical Bilateral Posterior Cordectomy for the Treatment of Bilateral Vocal Fold Paralysis

Abstract

Objectives: We performed a prospective study to assess respiratory function and voice quality before and after laser microsurgical bilateral posterior cordectomy performed for chronic airway obstruction in patients with bilateral vocal fold paralysis. Methods: In 17 patients a laser microsurgical posterior cordectomy was performed as an immediate bilateral approach. Roughness, breathiness, hoarseness, and dyspnea were evaluated both subjectively (on a scale from 0 to 3) and objectively (body plethysmography, computerized voice analysis: Göttingen Hoarseness Diagram). Results: After laser surgery, the patients' respiratory function was significantly increased and was sufficient for all activities of daily living. The body plethysmographic measure of airway resistance had superior descriptive power and correlated significantly with the clinical degree of dyspnea (scale 0 to 3). Pretreatment and posttreatment impairment of voice quality was objectively documented with the Göttingen Hoarseness Diagram; the phonatory results measured with it correlated significantly with the subjective clinical evaluation of hoarseness. Aphonia did not occur. Conclusions: A bilateral approach for laser microsurgical posterior cordectomy combines excellent airway improvement and satisfactory voice preservation. In bilateral vocal fold paralysis, pretreatment and posttreatment clinical data should be evaluated by objective measures.