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对6例行耳鼻喉科一般手术的患者在插管麻醉手术前后24小时各以喉描记器描记频率分布直方图(frequency histogram)一次,发现图形的改变与插管留置时间长短有关。术后声嘶病例见有低频范围扩大及言语基频抬高。频率分布直方图扩大直接与插管留置时间有关,低于25分钟者都没有变化。基频提高与插管留置时间无关而是继发于潜意识提高嗓音以补偿声嘶的结果。
Six patients undergoing otorhinolaryngectomy were anesthetized 24 hours before and after intubation anesthesia with a trachoma recorder histogram frequency histogram (frequency histogram) once and found that changes in the pattern and intubation indwelling the length of time. Postoperative hiss see a wide range of low frequency and speech fundamental frequency elevation. The frequency distribution histogram expansion directly related to intubation time, less than 25 minutes have not changed. The increase of fundamental frequency is independent of intubation indwelling time but is secondary to subliminal raising of the voice to compensate for hoarseness.