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KMID : 0361020010440060646
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Korean Journal of Otolaryngology - Head and Neck Surgery
2001 Volume.44 No. 6 p.646 ~ p.651
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Acoustic characteristics of patients undergoing short-term endotracheal intubation with or without thyroidectomy who had no nerve injury
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강보현/Bo Hyeon Kang
허성철/유승주/김상윤/남순열/Seong Cheol Heo/Seung Joo Yoo/Sang Yoon Kim/Soon Yuhl Nam
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Abstract
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Background and Objectives: We carried out an acoustic analysis to investigate the phonatory characteristics of patients undergoing short-term endotracheal intubation with or without thyroidectomy, and who had no nerve injury. Materials and
Methods:
The
patients were divided into two groups, one undergoing thyroidectomy (39 cases) and the other not undergoing thyroidectomy (25 cases). All patients of the thyroidectomy group had undergone thyroidectomy using general anesthesia with endotracheal
intubation. All patients of the other group had undergone chronic ear surgery with the same anesthetic method and duration. For the evaluation of voice, preoperative and postoperative acoustic analyses were done. Results: On the acoustic analysis
of
thyroidectomy group, jitter, shimmer and the vocal range were significantly increased at one day after thyroidectomy. But one month after thyroidectomy, these changes return to statistically insignificant increments, except for shimmer and the
vocal
range. These acoustical changes were not related to the extent of surgery between total thyroidectomy and hemithyroidectomy. In comparison with acoustical changes after short-term endotracheal intubation, the change of jitter and shimmer of
thyroidectomy group did differ significantly. Conclusion: Voice alteration after thyroidectomy without nerve injury may be associated with the disturbance of the prelaryngeal musculature. This voice changes emphasize the importance of the
extralaryngeal
skeleton for pitch control and early intensive speech therapy, especially in patients who need their voice professionally.
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