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Chemically inert air permeable ear insert valve - has section for passage of gases and pressure equalisation between outer and middles but preventing passage of solids or liquids
Chemically inert air permeable ear insert valve - has section for passage of gases and pressure equalisation between outer and middles but preventing passage of solids or liquids
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机译:化学惰性的透气耳塞阀-具有用于气体流通的部分和内部和外部之间的压力平衡,但防止固体或液体通过
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摘要
An air permeable chemically inert valve for insertion into the ear passage consists of a chemically inert tube (12) with a central section (14) around which the ear passage forms a seal and an aperture at each end. A second inert section (20) cuts off the cross-section of the tube channel (12). It prevents passage of solid or liquid material, but permits the passage of gases in and out of the middle ear. This system allow equalisation of pressure between the outer and middle ear sections.
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