Phonetics and Speech Sciences (말소리와 음성과학)

Korean Society of Speech Sciences (한국음성학회)
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Voice therapy for pitch problems following thyroidectomy without laryngeal nerve injury

신경학적 손상이 없는 갑상선 술 후 음도문제의 음성치료

  • Ji-sung Kim (Department of Speech-Language pathology, Graduate School of Public Health & Welfare, Konyang University) ;
  • Mi-jin Kim (Department of Speech-Language Therapy, Keimyung College University)
  • 김지성 (건양대학교 보건복지대학원 언어치료학과) ;
  • 김미진 (계명문화대학교 언어치료과)
  • Received : 2023.08.15
  • Accepted : 2023.09.05
  • Published : 2023.09.30
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Abstract

After thyroidectomy, some patients who show normal vocal cord movement still complain of subjective voice problems, which could lead to a decrease in quality of life related to communication. This study aims to investigate the effectiveness of a newly designed voice therapy applying neck exercise and semi-occluded vocal tract exercise (SOVTE) to improve voice problems after thyroidectomy without neurological injury. For this purpose, voice therapy was randomly assigned to 10 women who received thyroidectomy. Acoustic analysis [fundamental frequency, jitter, shimmer, noise-to-harmonics ratio, min Voice Range Profile (VRP), max VRP, VRP] was performed before and after surgery and immediately after voice therapy to compare voice changes. The study showed a statistically significant increase in max VRP and VRP after voice therapy compared to before surgery. These results suggest that the voice therapy methods in this study effectively improve a major symptom of voice problems after thyroidectomy, specifically the reduction in the high-frequency range. However, this study was limited in the number of s participants and did not control for the type of surgery. Therefore, further research utilizing larger sample sizes and controlled variables is needed to investigate the long-term effects of voice therapy.

갑상선 절제술 후 정상적인 성대 움직임을 보이는 경우의 29.7%가 주관적인 음성문제를 호소하며, 이는 의사소통과 관련된 삶의 질 저하로 이어질 수 있다. 본 연구의 목적은 신경학적 손상이 없는 갑상선 절제술 후 음성의 음도문제를 개선하기 위해 경부운동과 semi-occluded vocal tract exercise를 적용하여 고안한 음성치료법의 효과를 알아보는 것이다. 이를 위해 갑상선 절제술 후 음도문제를 보이는 여성 10명을 대상으로 무작위 배정에 의힌 음성치료를 갑상선 술 2주 후 1회 실시하였다. 술 전과 술 후, 음성치료 직후의 음성 비교하기 위해 음향학적 분석[fundamental frequency, jitter, shimmer, noise-to-harmonics ratio, min Voice Range Profile(VRP), max VRP, VRP]을 실시하였다. 연구결과, 술 전에 비해 술 후 유의한 감소를 보였던 max VRP, VRP가 음성치료 직후 유의한 증가를 보였다. 이와 같은 결과는 본 연구의 음성치료법이 갑상선 술 후 음성문제의 주요한 증상인 고음역대 주파수 저하를 개선하는데 효과적인 방법임을 시사한다. 추후에는 본 치료효과가 장기간 지속되는지에 대한 연구가 필요할 것이다.

Keywords

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