Wilson H L
Otolaryngol Head Neck Surg. 1982 Mar-Apr;90(2):241-50. doi: 10.1177/019459988209000219.
The ETS represents a modern version of the Toynbee tube. The ETS replaces the tube with sophisticated electronic equipment that amplifies and records the sounds of air entering the middle ear. The results of the test correlate well with the clinical behavior of the eustachian tube. The ETS does this by permitting the auditory tube to function in its normal state. It requires minimal patient response and does not require a soundproof room. It allows performance of the Toynbee, Politzer, and Valsalva maneuvers with the equipment in place and does not interfere with catheterization of the tubal orifice. Medications may be applied to the nose and nasopharynx or be given parenterally while the sonograph is in place. Thus far, it appears that the ETS is very useful in evaluating dysfunction of the eustachian tube.
ETS代表了现代版的通鼻管。ETS用精密的电子设备取代了通鼻管，该设备能放大并记录进入中耳的空气声音。测试结果与咽鼓管的临床表现相关性良好。ETS通过使咽鼓管在正常状态下发挥功能来实现这一点。它对患者的反应要求极低，且不需要隔音室。在设备就位的情况下，它允许进行吞咽、波利策尔氏法和瓦尔萨尔瓦氏动作，并且不干扰咽鼓管口的导管插入。在超声仪就位时，可以将药物应用于鼻腔和鼻咽部，或者通过非肠道途径给药。到目前为止，ETS在评估咽鼓管功能障碍方面似乎非常有用。
