Morphometric Analysis of the Vocal Folds in Japanese Adults during Microlaryngeal Surgery

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  • Miyamoto Makoto
    Dept. of Otolaryngology-Head and Neck Surgery, Kyorin University School of Medicine
  • Saito Koichiro
    Dept. of Otolaryngology-Head and Neck Surgery, Kyorin University School of Medicine
  • Nakagawa Hideki
    Dept. of Otorhinolaryngology, Seibo International Catholic Hospital

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  • 喉頭微細手術時に測定した成人声帯長, 声帯膜様部長の解析
  • コウトウ ビサイ シュジュツジ ニ ソクテイ シタ セイジン セイタイチョウ,セイタイマク ヨウ ブチョウ ノ カイセキ

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Abstract

<p>　Morphometrics of the larynx provides useful information to otolaryngologists undertaking clinical interventions such as intubation, endoscopy, microlaryngeal surgery, and phonosurgery. The aim of this study was to measure the length of the vocal folds (LVF) and the length of the membranous vocal folds (MVF) in Japanese subjects.</p><p>　This study was conducted in 73 patients with laryngeal diseases, such as vocal fold nodules, vocal fold polyps, and vocal fold leukoplakia. MVF was measured in all the 73 patients (age range, 17-94 years; male/female ratio, 41/32), while the LVF was measured in 64 of the 73 patients (age range, 17-94 years; male/female ratio, 36/28). The measurements were performed during the course of microlaryngeal surgery, using a millimeter-graded ruler. Gender differences in the MVF and LVF were also evaluated. In additional, the age, height and weight were examined to identify the existence of any correlations of the LVF and/or MVF with these variables in each gender.</p><p>　The mean LVF values in the men and women were 14.8±3.0 mm and 12.7±2.3 mm, respectively. Furthermore, the mean MVF values in the men and women were 11.8±2.2 mm and 10.0±2.1 mm, respectively. Both the LVF and MVF values were significantly higher in the men as compared with the women (LVF, p<0.01; MVF, p<0.05). No positive correlations of the MVF or LVF was observed with any of the other parameters examined in this study.</p><p>　Our study suggests that the gender exerts an important influence on the laryngeal morphometrics in Japanese adults.</p>

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