title: [Research of modified skin flap of external canal in auditory canal shaping to enlarge].
abstract: OBJECTIVE
  To investigate the new method of modified skin flap of external canal in auditory canal shaping to enlarge at radical mastoidectomy in endaural incision.
  
  
  METHODS
  From 1999 to 2009, 412 patients with 428 ears in operation were randomly divided into two groups. Patients underwent open mastoidectomy and some patients were performed concurrent tympanoplasty. A group (control group)were operated in traditional skin flap of external canal, B group is modified group. Bleed and effusion from the wound surface, the time of dry ear and the change of diameter of extermal acoustic meatus after one year were observed after the surgeries and deal the results with SPSS.
  
  
  RESULTS
  The difference had statistical significance in bleed and effusion from the wound surface, the time of dry ear and the shrink of external acoustic meatus in 12 months among two groups.
  
  
  CONCLUSIONS
  Modified skin flap of external canal in auditory canal shaping to enlarge can help to make a no-wound dehiscence by wiping out the raw surface of external acoustic meatus. It is better than traditional skin flap of external canal.
authors.affiliation: Department of Otorhinolaryngology, Shanxi People's Hospital,Taiyuan, 030012, China. wyp118@sina.com
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Tongli
authors.initials: T
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Xin
authors.initials: X
authors.lastname: Li
mesh_terms: D000368:Aged; D004424:Ear Canal / Q000601:surgery*; D006801:Humans; D008416:Mastoid / Q000601:surgery*; D011183:Postoperative Complications; D012665:Semicircular Canals; D013524:Surgical Flaps / Q000637:transplantation*; D014433:Tympanoplasty / Q000379:methods*