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12 May 1995 Influence of middle ear pressure alteration and middle ear effusion on vibration characteristics of human tympanic membrane
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Abstract
A laser doppler vibrometer was used to measure the motion of a simple middle ear model and tympanic membrane vibrations of human temporal bone specimen. Different pathological conditions were simulated: Increasing or decreasing middle ear pressure to defined levels create a situation similar to a barootitis. Additionally the middle ear cavities were partially or totally filled with fluids of different viscosities. Characteristic changes of the vibration patterns were detected: With increasing pressure difference between middle ear and atmosphere the vibration amplitudes decreased. In middle ear effusions diminished amplitudes were obtained, depending on the fluid-occupied volume within the tympanic cavity. The vibration pattern was not influenced by differences in the viscosity of the effusion. Therefore a preoperative examination of a patient with middle ear effusions by laser doppler vibrometer offers no predictive aspect to the decision whether a ventilation tube should be inserted or not.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Norbert Stasche M.D., Karl Hoermann M.D., Hans-Jochen Foth, Frank Bernecker, and Thomas G. Barton "Influence of middle ear pressure alteration and middle ear effusion on vibration characteristics of human tympanic membrane", Proc. SPIE 2395, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems V, (12 May 1995); https://doi.org/10.1117/12.209109
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