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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
Published on: August 29, 2017
Postoperative change in wideband absorbance after tympanoplasty in chronic suppurative otitis media
Hyun Woo Park1, Jungmin Ahn2, Min Woong Kang3
1Department of Otorhinolaryngology-Head and Neck Surgery, Gyeongsang National University Hospital, Jinju, Republic of Korea.
Objective:
To identify the wideband absorbance (WBA) of reconstructed TM comparing with perforated and normal TM, and to investigate the efficacy of WBA to predict postoperative hearing outcome.
Methods:
Ninety-eight adults (128 ears) with normal TM and 40 patients (40 ears) who were diagnosed with chronic suppurative otitis media (CSOM) and underwent tympanoplasty type 1 were enrolled. Pure tone audiometry and WBA were measured before and 6 and 12 months after surgery. Finally, only 29 patients in CSOM group completed all the tests.
Results:
Significant differences in WBA were observed between normal ears, CSOM, and reconstructed ears at middle to high frequencies. During follow-up, absorbance decreased at low frequencies and increased at middle to high. Significant positive correlation at low to middle frequency was observed between change in air-bone gaps (ABG) and absorbance at corresponding frequencies.
Conclusion:
WBA in patients with CSOM was significantly different from normal TM, and a significant change in WBA was observed after tympanoplasty with improvement of ABG. WBA may be a useful tool for monitoring the postoperative change in absorbance of sound energy in the middle ear.
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