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Rehabilitation Practice and Science

Translated Title

單側聲帶麻痺患者之喉部肌電圖變化

Abstract

Background: Unilateral vocal fold paralysis causes incomplete closure of the glottis. Clinical manifestations include hoarseness and dysphagia, thus hindering the patients' quality of life. To characterize chronological laryngeal electromyographic changes, this prospective study evaluated laryngeal electromyography and voice at two time points in patients with unilateral vocal fold paralysis. Study design: A retrospective study. Methods: In this study, 12 patients with unilateral vocal fold paralysis who did not receive surgical treatment or injection therapy were recruited. Laryngeal electromyography was performed on the thyroarytenoid-lateral cricoarytenoid (TA-LCA) muscle complex and cricothyroid (CT) muscle, and quantitative analysis was conducted on the TA-LCA muscle complex. The patients received initial and follow-up assessments at a 6-month interval. Each assessment included a videolaryngostroboscopy that yielded a normalized glottal gap area (NGGA), an acoustic voice analysis, a voice outcome survey (VOS), and a 36 item short form survey (SF-36). Results: The laryngeal electromyography for the TA-LCA muscle complex did not show a significant difference between the initial and follow-up assessments for their spontaneous activity (p=0.371) or polyphasic waves (p=0.667). However, quantitative laryngeal electromyography revealed an increased peak turn frequency in the follow-up assessment as compared with that in the initial assessment (p= 0.046). Compared with the initial assessment, the follow-up assessment revealed improved maximal phonation time (p=0.011) and harmonic-to-noise ratio (p=0.021), but no improvement in S/Z ratio, fundamental frequency, jitter, or shimmer. The scores in the VOS and several SF-36 items, including vitality (p=0.038), general health perception (p=0.036), and role limitation due to physical health (p= 0.045), all improved at the follow-up assessment. Conclusion: Quantitative EMG study of the thyroarytenoid-lateral cricoarytenoid (TA-LCA) muscle complex in patients with unilateral vocal fold paralysis showed gradual recovery of neuromuscular recruitment over time, this is accompanied by improvement in voice and quality of life.

Language

Traditional Chinese

First Page

49

Last Page

57

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