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KMID : 1004320130240010033
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Journal of the Korean Society of Logopedics and Phoniatrics
2013 Volume.24 No. 1 p.33 ~ p.40
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Voice Analysis before and after Radioactive Iodine Ablation in Patients with Total Thyroi
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Hong Ki-Hwan
Seo Eun-Ji
Lee Hyun-Doo
Yoon Yun-Sub
Lim Seok-Tae
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Abstract
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Background and Objectives: This study is to objectively compare and analyze the acoustic changes in the patients with total thyroidectomy before and after RI therapy.
Subjects and Methods: For this study, a total of 50 patients with total thyroidectomy were participated as subjects. Voice samples were obtained at the time of post-operation (Post-OP), before high-dose radioactive iodine therapy (Pre-RIT), and after high-dose radioactive iodine therapy (Post-RIT). Acoustic analysis, the maximum phonation time and K-VHI (Korea-Voice handicap index) were used for subjective evaluation.
Results: According to the comparison analysis of the three periods, mFo (Hz) was significantly reduced in all of the vowels /a/ and /i/ as the hormone was discontinued. This can be related to the reduction in vocal range. As thyroid hormone was discontinued, Shim (%) and APQ (%) values, which are the parameters related to the degree of aggressiveness, showed a significant increase in the middle vowel /a/. As thyroid hormone was discontinued, emotional index was significantly decreased in VHI (voice handicap index).
Conclusion: These results can be assumed that thyroid hormone suspension is related to the increased changes in the vocal intensity, the increase in noise and the reduction in vocal range. Emotionally, these data can be assumed that the responsive factors of one’s own voice disorders were significantly decreased in the patients with vocal handicap.
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KEYWORD
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Total thyroidectomy, Radioactive iodine therapy, Voice
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