Advanced

Effects on cochlear frequency selectivity after hypobaric pressure exposure.

Brännström, Jonas LU and Grenner, Jan LU (2008) In The Journal of the Acoustical Society of America 123(5).
Abstract
The effects of hypobaric pressure chamber exposure was measured in noise in ten patients with monaural fluctuating low-frequency hearing loss (FLFHL) such as Meniere's disease using psychophysical tuning curves (PTC), transiently evoked otoacoustic emissions (TEOAE), binaural pitch matches and speech recognition scores (SRS) in noise. In the literature, reversible hearing losses have been observed in about 50 % of the patients, but sometimes improved SRS can be observed in patients without hearing threshold improvement. This indicates possible effects of pressure treatment on cochlear frequency selectivity. The relative overpressure in the middle ear obtained after repeated exposures in hypobaric pressure chamber (total duration 18.5 to 28... (More)
The effects of hypobaric pressure chamber exposure was measured in noise in ten patients with monaural fluctuating low-frequency hearing loss (FLFHL) such as Meniere's disease using psychophysical tuning curves (PTC), transiently evoked otoacoustic emissions (TEOAE), binaural pitch matches and speech recognition scores (SRS) in noise. In the literature, reversible hearing losses have been observed in about 50 % of the patients, but sometimes improved SRS can be observed in patients without hearing threshold improvement. This indicates possible effects of pressure treatment on cochlear frequency selectivity. The relative overpressure in the middle ear obtained after repeated exposures in hypobaric pressure chamber (total duration 18.5 to 28 minutes) was used to impose pressure gradients to the inner ear. The results indicated that the treatment effects were small, but slightly improved SRS in noise, TEOAEs emission strength and PTCs were observed after treatment. Pure tone hearing thresholds improved only for patients exposed to longer treatment durations. Subjective improvement at follow-up could not be predicted from the results. Although the effects were small, the data suggest that hypobaric pressure treatment may improve cochlear frequency selectivity in the affected ear in patients with monaural FLFHL. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of the Acoustical Society of America
volume
123
issue
5
publisher
American Institute of Physics
external identifiers
  • PMID:18531038
ISSN
1520-8524
DOI
10.1121/1.2934298
language
English
LU publication?
yes
id
f3ce09ff-a428-49b3-9179-94dc1dab29fd (old id 1169117)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/18531038?dopt=Abstract
date added to LUP
2008-07-03 09:49:11
date last changed
2016-09-14 12:50:50
@article{f3ce09ff-a428-49b3-9179-94dc1dab29fd,
  abstract     = {The effects of hypobaric pressure chamber exposure was measured in noise in ten patients with monaural fluctuating low-frequency hearing loss (FLFHL) such as Meniere's disease using psychophysical tuning curves (PTC), transiently evoked otoacoustic emissions (TEOAE), binaural pitch matches and speech recognition scores (SRS) in noise. In the literature, reversible hearing losses have been observed in about 50 % of the patients, but sometimes improved SRS can be observed in patients without hearing threshold improvement. This indicates possible effects of pressure treatment on cochlear frequency selectivity. The relative overpressure in the middle ear obtained after repeated exposures in hypobaric pressure chamber (total duration 18.5 to 28 minutes) was used to impose pressure gradients to the inner ear. The results indicated that the treatment effects were small, but slightly improved SRS in noise, TEOAEs emission strength and PTCs were observed after treatment. Pure tone hearing thresholds improved only for patients exposed to longer treatment durations. Subjective improvement at follow-up could not be predicted from the results. Although the effects were small, the data suggest that hypobaric pressure treatment may improve cochlear frequency selectivity in the affected ear in patients with monaural FLFHL.},
  articleno    = {3458},
  author       = {Brännström, Jonas and Grenner, Jan},
  issn         = {1520-8524},
  language     = {eng},
  number       = {5},
  publisher    = {American Institute of Physics},
  series       = {The Journal of the Acoustical Society of America},
  title        = {Effects on cochlear frequency selectivity after hypobaric pressure exposure.},
  url          = {http://dx.doi.org/10.1121/1.2934298},
  volume       = {123},
  year         = {2008},
}