耳鼻咽喉科臨床 補冊
Online ISSN : 2185-1557
Print ISSN : 0912-1870
ISSN-L : 0912-1870
1989 巻, Supplement30 号
選択された号の論文の1件中1~1を表示しています
  • 藤田 文香
    1989 年 1989 巻 Supplement30 号 p. 1-24
    発行日: 1989/01/10
    公開日: 2012/11/27
    ジャーナル フリー
    A new method of testing phonetic function was developed by measuring the intraoral air pressure producing /p/ and /b/ and the air flow rate within the vowel-consonantvowel syllables (/ipi/ and /ibi/) in normal subjects and the following 4 patient groups: hypertrophic glottal lesions, unilateral vocal cord palsy, glottic laryngeal cancer, and postvertical hemilaryngectomy.
    The mean values for 1) the maximum amplitude of the intraoral air pressure for /p/ and /b/ (abbreviated as pr. /p/ and pr. /b/),2) the difference of amplitude between them (abbreviated as prip/-/b/), and 3) pr. /p/ divided by the average flow rate of postconsonant /i/ (abbreviated as pr. /p/. flow ratio) were calculated for every group. The normal range was set as the mean ± 2 S. D. of normal subjects for pr. /p/, pr. /p/./b /, prip/. flow ratio. For these 3 parameters the percent abnormality in the 4 patient groups was also calculated. Comparing the results between the groups and with the data of other phonetic function tests, the clinical usefulness of this test was evaluated. The mean value for pr. /p/ in all 4 patient groups was significantly higher than in the normal group. Pr. /p/ was regarded as a sensitive indicator for assessing abnormalities in the larynx. The percent abnormality for pr. /p/ increased in the following order: hypertrophic lesions, unilateral vocal cord palsy, laryngeal cancer, and posthemilaryngectomy.
    The mean value and percent abnormality for pr. /p/-/b/ was high in laryngeal cancer and posthemilaryngectomy. Pr. /p/ and pr. /p/-/b/ were considered to be valuable indicators for sclerotic lesions of the larynx, which are difficult to detect by current aerodynamic tests. Pr. /p/-/b/ correlated with the acoustic image of “strained”. The pr. /p/. flow ratio was believed to decrease as a result of glottal insufficiency caused by the recurrent palsy. The percent abnormality for this ratio was 100% in the unilateral vocal cord palsy group.
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