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The effect of high frequency sound on the internal ear receptors in chronic purulent otitis media


, : The effect of high frequency sound on the internal ear receptors in chronic purulent otitis media. Vestnik Otorinolaringologii (2): 8-13

Ultrastructural changes in the internal ear receptors in response to high-frequency sound exposure (6 h daily for 5 days at 4000 Hz and 100 .cntdot. dB) were studied on 3 rabbits and 4 guinea-pigs with experimental chronic purulent otitis media (CPOM). The experimental infection was produced by Staphylococcus aureus bacteria (3.3 .times. 109 for rabbits and 2.2 .times. 109 for guinea-pigs), induced into the middle ear using paracentesis tympany. The development of CPOM was observed for 6 mo. The same manipulation was performed without acoustic exposure. It is noted that CPOM induces ultrastructural changes in the internal ear cochlear and vestibular receptors, rapidly advancing after acoustic exposure. The most severe impairment was seen in the lower part of the cochlea. The results obtained demonstrate the effect of acoustic energy on the cells, undergone alterations due to a chronic purulent process in the middle ear and exhibiting a more pronounced response.

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