Waveform as a point in tympanometry.
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Accession number;05A0136089
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| Title;Waveform as a point in tympanometry. |
| Author;
NISHIZAKI KAZUNORI
(Graduate School of Medicine and Dentistry, Okayama Univ., JPN)
OKA AKIKO
(Okayama Saiseikai General Hospital, JPN)
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Journal Title;Modern Medical Laboratory
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Journal Code:Z0084B
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ISSN:0301-2611
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VOL.33;NO.1;PAGE.82-84(2005)
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| Figure&Table&Reference;FIG.2, REF.9 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The waveform in tympanometry (I) (type A, type B, type C, other special waveform), cautionary points in the measurement, the structure and principle of (I), and the basic parameters (ear canal pressure at the peak, sound equivalent ear canal volume, static sound compliance) are outlined. In (I), the changes in the compliance (the degree of propagation of sound on the tympanic membrane) are recorded while the ear canal pressure is changed, and the mobility of middle ear sound conduction system, namely, tympanic membrane and ossicular chain, can be evaluated. Though (I) is used for the differentiating diagnosis of conduction deafness (middle ear disease), it does not agree with theoretical waveform in many cases. Therefore, it is necessary to recognize it as a support diagnostic test, and to judge comprehensively with the results of other audiometry such as ear specula test in the differentiating diagnosis of deafness. |
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