耳管機能検査法におけるPerlman法と気流動態法との比較

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In order to evaluate the validity of Perlmans method, which had been widely used as a test for Eustachian tube function, the test results were compared with those obtained by aerodynamic method which we had developed.Thirty subjects were adopted in this study, that is, 10 normal subjects, 10 subjects with obstructive tube and 10 with patent tubes. Their diagnosis was based on both objective and subjective findings.Procedure of Perlmans method is that: pure tone of 250 Hz at 100 phons was introduced into the nasopharynx from a nostril and both the sound waves and sound pressure levels during deglutitions were recorded through a microphone in the external ear canal. Aerodynamic measurement was performed by reg istering pressures in the ear canal and nasopharynx during Valsalvas maneuver and deglutitions using a pressure transducer.The aerodynamic method permitted objective evaluation of the tubal function in all of the cases tested, whereas Perlmans method provided inconsistent results with pathological conditions of the Eustachian tube in not a few cases.Through additional experiment, it was confirmed that the inconsistency observed in Perlmans method was partly due to concomitent movements of the mouth and the pharynx in deglutition, which had a marked effect upon the amplitude of the sounds picked up in the ear canal.It may be concluded that aerodynamic method is more reliable and practical than Perlmans method as a test for examination of Eustachian tube function.
社団法人日本耳鼻咽喉科学会の論文

耳管機能検査法におけるPerlman法と気流動態法との比較

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