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CISDOC database
| Document ID (ISN) | 55332 |
| CIS number |
91-296 |
| ISSN - Serial title |
0095-6562 - Aviation, Space, and Environmental Medicine |
| Year |
1990 |
| Convention or series no. |
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| Author(s) |
Devine J.A., Forte V.A., Rock P.B., Cymerman A. |
| Title |
The use of typanometry to detect aerotitis media in hypobaric chamber operations |
| Bibliographic information |
Mar. 1990, Vol.61, No.3, p.251-255. Illus. 20 ref. |
| Abstract |
Diagnosis and quantification of aerotitis media were performed using a modified commercially-available tympanometer under hypobaric conditions. Subjects were 22 males and 9 females, 22-43 years of age, who were tested in each ear with the tympanometer prior to and after exposure, sequentially at the barometric pressue plateaus of 706, 656, 609, 586, 564, and 522mm Hg, and following an induced ear block during a 1-min descent from 522 to 586mm Hg. Each subject was examined once either alone or in pairs during a 90-min exposure. Aerotitis media was detected using tympanometry at simulated altitude as evidenced by the difference between measurements made during induced ear blocks and those made prior to inducement, as well as following relief of the pressure differential with the Valsolva manoeuvre. There were no significant differences between pre- and post-induced aerotitis media values at 586mm Hg, or between pre- and post-hypobaria. Thus, tympanometry can be a valuable tool in managing aerotitis media in the aeromedical environment. |
| Descriptors (primary) |
decompression otitis; negative pressure; diagnosis; diseases of middle ear; otitis media; barotrauma |
| Descriptors (secondary) |
human experiments |
| Document type |
D - Periodical articles |
| Country / State or Province | USA |
| Subject(s) |
Occupational pathology
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| Broad subject area(s) |
Physical hazards
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| Browse category(ies) |
Diseases of the ear and hearing damage
Hypobaric pressure
Hyperbaric pressure
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