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首页> 外文期刊>Otolaryngology--head and neck surgery: official journal of American Academy of Otolaryngology-Head and Neck Surgery >Effects of surface dehydration on mucosal wave amplitude and frequency in excised canine larynges.
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Effects of surface dehydration on mucosal wave amplitude and frequency in excised canine larynges.

机译：表面脱水对切除的犬喉粘膜波振幅和频率的影响。

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OBJECTIVE: Evaluate the effect of vocal fold surface dehydration on mucosal wave amplitude and frequency. STUDY DESIGN: Controlled test-retest. SETTING: Larynges were mounted on an excised larynx phonation system and attached to a pseudolung in a triple-walled sound-attenuated room that eliminated background noise and maintained a stabilized room temperature and humidity level. SUBJECTS AND METHODS: High-speed video was recorded for 8 excised canine larynges during exposure to dehumidified air at 20 cm H(2)O. Control trials consisted of high-speed videos recorded for 2 excised canine larynges during exposure to humidified air at the same pressure. RESULTS: In the majority of larynges, increased levels of dehydration were correlated with decreased amplitude and frequency. The slope of the linear regression fitted to the change in amplitude (P = .003) and the percent change (P < .001) between the initial and final trials were significantly decreased in dehydrated larynges. These measurements with respect to the change in frequency were also significantly decreased in dehydrated larynges (P < .001; P = .027). CONCLUSION: Vocal fold surface dehydration caused a decrease in mucosal wave amplitude and frequency. This study provides objective, quantitative support for the mechanism of voice deterioration observed after extreme surface dehydration.
机译：目的：评价声带表面脱水对粘膜波幅度和频率的影响。研究设计：受控重测。地点：将喉头安装在经切除的喉头发声系统上，并连接至三层隔音墙的假肺中，该隔声室消除了背景噪音并保持了稳定的室温和湿度水平。研究对象和方法：在暴露于20 cm H（2）O的除湿空气中期间，记录了8条切除的犬喉的高速视频。对照试验包括在相同压力下暴露于潮湿空气期间记录的两个切除的犬喉的高速视频。结果：在大多数喉中，脱水水平增加与振幅和频率降低相关。在脱水喉中，与初始试验和最终试验之间的振幅变化（P = .003）和百分比变化（P <.001）拟合的线性回归的斜率显着降低。这些关于频率变化的测量在脱水喉中也显着降低（P <.001; P = .027）。结论：声带表面脱水导致粘膜波振幅和频率降低。这项研究为极端表面脱水后观察到的声音恶化机理提供了客观，定量的支持。

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