Quantitation of pneumatic otoscopy | 合法醫療器材資訊網

由LRClarke著作·1987·被引用18次—Pneumaticotoscopyhaslongbeenespousedasaneasilyandrapidlyused,inexpensivemethodforroutineevaluationofthetympanicmembraneandmiddleear.

Pneumatic otoscopy has long been espoused as an easily and rapidly used, inexpensive method for routine evaluation of the tympanic membrane and middle ear. This widely used technique, however, has not been explored in a quantitative manner. Therefore, we measured the differential pressure and frequency of the pressure pulse used by a group of experienced otoscopists during routine pneumatic otoscopic examination. We found the pressure pulse varied from 170 to 520 mm H2O and the frequency varied from 2.2 to 4.9 pulses per second. We used a pneumatic pump to deliver a controlled pressure pulse--at a frequency of 4.0/sec--to the pneumatic otoscope. This device was used to measure the minimum pressure pulse necessary for the experienced otoscopist to merely detect tympanic membrane movement in normal ears. The threshold for visible movement ranged from 10 to 15 mm H2O. Thus, even the most gentle otoscopist used a pressu...