The Use of Tympanometry to Detect Aerotitis Media in Hypobaric Chamber Operations
Abstract
Aerotitis media (barotrauma, ear block) is the most prevalent medical problem occurring within hypobaric chamber (6) and aviation operations (7). The condition, which may occur unilaterally or bilaterally, results from the inability to equilibrate pressure within the middle ear cavity through the Eustachian tubes following an increase in ambient air pressure (8). The resulting pressure differential between the middle ear and atmosphere stretches the tympanic membrane producing discomfort or pain. Diagnosis and quantification of aerotitis media were performed using a modified commercially-available tympanometer under hypobaric conditions. 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 Valsalva maneuver. There were no significant differences between pre- and post-induced aerotitis media values at 586 mm Hg, or between pre- and post-hypobaria. Our study suggests that tympanometry can be a valuable tool in managing aerotitis media in the aeromedical environment. Reprints. (KT)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1990
- Accession Number
- ADA219963
Entities
People
- Allen Cymerman
- James A. Devine
- Paul B. Rock
- Vincent A. Forte Jr.
Organizations
- United States Army Research Institute of Environmental Medicine