title: Relationship between postoperative aeration around the stapes and postoperative hearing outcome after canal wall down tympanoplasty with canal reconstruction for cholesteatoma.
abstract: OBJECTIVE
  To evaluate the correlation between postoperative aeration around the stapes and hearing outcome after canal wall down tympanoplasty with canal reconstruction for cholesteatoma.
  
  
  METHODS
  Retrospective case review.
  
  
  METHODS
  University hospital otolaryngology department.
  
  
  METHODS
  Seventy ears of 65 patients with middle ear cholesteatoma were included. Patients who had fixed or poorly mobile ossicular chain was excluded.
  
  
  METHODS
  They were underwent canal wall down tympanoplasty with canal reconstruction. Canal wall was reconstructed with the tragal or conchal cartilage and the cortical bone plate.
  
  
  METHODS
  We measured aeration around the stapes on coronal and axial computed tomographic sections at 1 year after ossiculoplasty and investigated the correlation between postoperative aeration around the stapes and postoperative air-bone gap (using the mean of 0.5-, 1-, and 2-kHz threshold values) at 1 year after ossiculoplasty. We also investigated it for each of Wullstein type and for each of 0.25-, 0.5-, 1-, 2-, and 4-kHz thresholds.
  
  
  RESULTS
  Aeration around the stapes was negatively correlated with postoperative air-bone gap (correlation coefficient, -0.53; p < 0.05). Types I and IV tympanoplasty had a higher correlation with postoperative air-bone gap than type III tympanoplasty. The 0.5-KHz frequency had a higher correlation with postoperative air bone gap than other frequencies.
  
  
  CONCLUSIONS
  Measurement of postoperative aeration around the stapes is an effective method for evaluating the importance of middle ear aeration. Aeration around the stapes contributes to better hearing outcome.
authors: Department of Otorhinolaryngology, Jichi Medical University, Saitama Medical Center, Omiya-ku, Saitama, Japan. aknewpan@jichi.ac.jp
authors: Akihiro
authors: A
authors: Shinnabe
authors: Mariko
authors: M
authors: Hara
authors: Masayo
authors: M
authors: Hasegawa
authors: Shingo
authors: S
authors: Matsuzawa
authors: Kozue
authors: K
authors: Kodama
authors: Hiromi
authors: H
authors: Kanazawa
authors: Naohiro
authors: N
authors: Yoshida
authors: Yukiko
authors: Y
authors: Iino
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001844:Bone Conduction; D018424:Cholesteatoma, Middle Ear / Q000601:surgery*; D004424:Ear Canal / Q000601:surgery*; D004432:Ear, Middle / Q000601:surgery*; D005260:Female; D006309:Hearing; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D019651:Plastic Surgery Procedures / Q000379:methods*; D012189:Retrospective Studies; D016896:Treatment Outcome; D014433:Tympanoplasty / Q000379:methods*