Vibration analysis of the tympanic membrane with a ventilation tube and a perforation by holography

Manabu Maeta; Shinichiro Kawakami; Toshiaki Ogawara; Yu Masuda

doi:10.1117/12.44663

1 August 1991 Vibration analysis of the tympanic membrane with a ventilation tube and a perforation by holography

Manabu Maeta, Shinichiro Kawakami, Toshiaki Ogawara, Yu Masuda

Proceedings Volume 1429, Holography, Interferometry, and Optical Pattern Recognition in Biomedicine; (1991) https://doi.org/10.1117/12.44663
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

For severe otitis media with effusion, insertion of a ventilation tube is performed for the purpose of ventilation of the middle ear cavity and normalization of the eustachian tubular function and middle ear mucosa. The ventilation tube is left in place for as long as several months or even a few years. However, the influence of the indwelling tube on vibration of the tympanic membrane is unknown. Therefore, the authors observed the influence by means of time-averaged holography using human tympanic membranes. The following results were obtained. After insertion of a ventilation tube, vibration pattern of the tympanic membrane was not obviously changed, but the vibration amplitude of the tympanic membrane was decreased, especially at 500 Hz. Generally speaking, the change caused by insertion of a ventilation tube was very small. Also, the vibration pattern of perforated tympanic membrane was not changed, but the vibration amplitude of perforated tympanic membrane was decreased at the low frequency area.

Citation Download Citation

Manabu Maeta, Shinichiro Kawakami, Toshiaki Ogawara, and Yu Masuda "Vibration analysis of the tympanic membrane with a ventilation tube and a perforation by holography", Proc. SPIE 1429, Holography, Interferometry, and Optical Pattern Recognition in Biomedicine, (1 August 1991); https://doi.org/10.1117/12.44663

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