Laryngeal electromyography: Contribution to vocal fold immobility diagnosis
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Laryngeal Electromyography (LEMG) is a diagnostic test commonly used in patients with vocal fold movement disorder The aim of this study is to describe LEMG in patients with vocalfold immobility. A total of 55 dysphonic patients with vocal fold immobility diagnosed by laryngeal endoscopy were grouped according to probable clinical cause: 1) unknown; 2) traumatic; or 3) tumoral compression. They were submitted to LEMG by percutaneous insertion of concentric needle electrode. LEMG was conclusive in all patients and showed a majority with peripheral nerve injury. LEMG diagnosed peripheral nerve damage in 25 group 1, 12 group 2, and 11 group 3 patients. LEMG was normal in 4 patients, suggesting cricoarytenoid joint fixation. Central nervous system disorders was suggested in 2 and myopathic pattern in 1. As the major cause of vocal fold immobility is peripheral nerve damage, LEMG is an important test to confirm diagnosis.
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Electromyography , Laryngeal , adult , aged , arthropathy , central nervous system disease , compression , controlled study , diagnostic test , dysphonia , electrode , electromyography , endoscopy , female , human , larynx disorder , larynx injury , larynx tumor , major clinical study , male , myopathy , needle , peripheral nerve injury , vocal cord , Adolescent , Adult , Aged , Endoscopy , Female , Humans , Laryngeal Nerves , Male , Middle Aged , Prognosis , Recurrent Laryngeal Nerve , Vocal Cord Paralysis
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Electromyography and Clinical Neurophysiology, v. 44, n. 6, p. 371-374, 2004.
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