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The Microscopic Transcanal Approach in Stapes Surgery Revisited
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Does stapedotomy improve high frequency conductive hearing?

Prithwijit Roychowdhury1,2, Marc D Polanik1,2, Judith S Kempfle1,3

  • 1Department of Otolaryngology-Head and Neck Surgery Massachusetts Eye and Ear Infirmary Boston Massachusetts USA.

Laryngoscope Investigative Otolaryngology
|August 17, 2021
PubMed
Summary
This summary is machine-generated.

Stapedotomy surgery significantly improves low-frequency hearing but offers less reliable high-frequency hearing gains. Further research is needed to address persistent high-frequency air-bone gaps after stapedotomy.

Keywords:
conductive hearing losshearing losshigh‐frequency hearing lossotosclerosisstapedotomy

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Area of Science:

  • Otolaryngology
  • Audiology
  • Surgical Innovation

Background:

  • Stapedotomy is a common surgical procedure to correct conductive hearing loss.
  • While effective for low frequencies, high-frequency hearing outcomes post-stapedotomy are less predictable.
  • High-frequency air-bone gap changes after stapedotomy require further investigation.

Purpose of the Study:

  • To evaluate changes in high-frequency (HF) air-bone gap (ABG) after stapedotomy.
  • To measure changes in HF air conduction (AC) thresholds as a function of frequency.
  • To compare low-frequency (LF) and HF ABG closure post-stapedotomy.

Main Methods:

  • Retrospective review of 46 patients undergoing primary stapedotomy with incus wire piston prosthesis.
  • Analysis of pre- and postoperative audiograms.
  • Calculation of LF ABG (250, 500, 1000 Hz) and HF ABG (4 kHz).

Main Results:

  • Significant reduction in both LF ABG (36.9 to 9.35 dB) and HF ABG (31.1 to 14.5 dB) was observed (P < .001).
  • LF ABG closure was over 1.5 times greater than HF ABG closure (P < .001).
  • Air conduction gain decreased with increasing frequency (P < .001).

Conclusions:

  • Stapedotomy yields greater hearing improvement at low frequencies compared to high frequencies.
  • Postoperative air-bone gaps persist at 4 kHz.
  • Further research into the biomechanics and histopathology of high-frequency deficits is needed to enhance stapedotomy outcomes.