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Ear surgery techniques results on hearing threshold improvement.

Farhad Mokhtarinejad1, Saeed Soheili Pour2, Mohammad Hussein Nilforoush3

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Journal of Research in Medical Sciences : the Official Journal of Isfahan University of Medical Sciences
|January 2, 2014
PubMed
Summary

Ear surgeries like stapedectomy and ossicular reconstruction can improve bone conduction (BC) thresholds by an average of 5 dB. Addressing middle ear issues through surgery can reduce hearing problems by improving BC results.

Keywords:
Bone conductionhearing threshold improvementpartial ossicular replacement prosthesisstapedectomytotal ossicular replacement prosthesistympanoplasty

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Area of Science:

  • Otolaryngology
  • Audiology
  • Surgical Innovation

Background:

  • Bone conduction (BC) hearing loss can be an artifact of middle ear pathologies, not solely sensorineural decline.
  • Ossicular chain problems can significantly impact BC thresholds.
  • Evaluating the effect of ear surgeries on BC is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To investigate the influence of various ear surgeries on bone conduction thresholds.
  • To determine if surgical correction of middle ear pathologies improves BC results.
  • To quantify the changes in BC thresholds following specific otologic procedures.

Main Methods:

  • A clinical trial involving 83 patients undergoing ear surgery.
  • Patient groups included stapedectomy, tympanomastoid surgery, and ossicular reconstruction with Partial Ossicular Replacement Prosthesis (PORP) or Total Ossicular Replacement Prosthesis (TORP).
  • Bone conduction thresholds were measured at 250, 500, 1000, 2000, and 4000 Hz pre- and post-operatively.

Main Results:

  • Stapedectomy showed an approximate 6 dB BC threshold improvement at 2000 Hz.
  • Tympanomastoid surgery resulted in a 4 dB change in BC thresholds at 500, 1000, and 2000 Hz (P<0.05).
  • PORP and TORP groups demonstrated BC threshold improvements of 5 dB and up to 6.5 dB (especially at 4000 Hz), respectively.

Conclusions:

  • Several ear surgeries, including stapedectomy, tympanoplasty, PORP, and TORP, lead to significant bone conduction threshold shifts.
  • An average BC improvement of approximately 5 dB was observed post-surgery.
  • Resolving middle ear pathologies and ossicular chain problems through surgery effectively improves BC thresholds, thereby reducing hearing difficulties.