Diagnostic significance of electromyography in patients with larynx motor innervation disorders
Larynx motor innervation disorders are caused by various pathological conditions. Among them there are mechanical trauma of laryngeal nerves, neoplastic process in the mediastinum, myasthenia and neuroinfections. Larynx electromyography is a highly informative method optimizing treatment of patients with larynx immobility disorders.48 patients with larynx immobility disorders were examined. Examination included anamnesis, a general ENT examination, videolaryngoscopy, LEMG investigation. We found out bilateral damage of recurrent nerve in 41 (85.42%) cases, unilateral lesion of left reccurent nerve in 3 (6.25%) cases, unilateral lesion of right recurrent nerve in 4 (8.33%) cases. According to LEMG, the presence of electromyography activity of the introduction was seen in 100% of cases, abnormal spontaneous activity in 3 (6.25%) patients with larynx immobility disorders. The reductions of different intensity of agonist activity TA and PCA musles both sides were indicated in patients with bilateral larynx immobility and the presence of antagonistic activity TA and PCA muscles in 23 (56.09%) cases respectively. These results allowed to recommend surgical laterofixation of the vocal fold to 35 (85.36%) patients, conservative treatment was recommended to the rest 6 (14.63%) patients with bilateral larynx immobility.LEMG gives us an opportunity not only to detect innervation impairment of the laryngeal muscles, but also to analyze the indications for surgical and conservative treatment and assess its effectiveness as well.