title: The Use of an Ultrasonic Serrated Knife in Transcanal Excision of Exostoses.
abstract: To describe a novel approach for excision of exostoses and evaluate the outcomes of transcanal excision of exostoses using ultrasonic serrated knife-assistance versus microosteotomes only.
  
  
  
  Retrospective analysis.
  
  
  
  Academic Tertiary Care Center.
  
  
  
  Patients receiving a transcanal excision of exostoses between 2007 and 2016.
  
  
  
  The outcomes and postoperative complications of 138 patients who received transcanal microosteotome only technique were compared to 10 patients who received transcanal excision of exostoses using ultrasonic serrated knife-assistance (Stryker Corporation, Kalamazoo, MI).
  
  
  
  A total of 175 ears in 128 patients underwent a transcanal microosteotome only technique. Of these, 11 (6.3%) developed an intraoperative tympanic membrane perforation. One developed anterior canal mobilization requiring prolonged (3 wk) packing. One hundred thirty-five ears (77%) were well healed by the 3-week postoperative visit. All but one ear was well healed by the 6-week visit. In comparison, 11 ears in 10 patients were treated for exostoses using a transcanal approach with the use of ultrasonic serrated knife and microosteotomes. One ear canal (the first in the series) was not well healed by the 3-week postoperative visit due to suspected thermal injury. All patients had well-healed ear canals by 6 weeks, and there were no complications.
  
  
  
  This is the first series to report the use of an ultrasonic serrated knife in the transcanal excision of exostoses. When compared with a transcanal microosteotome only excision of exostoses, the addition of the Sonopet seems to result in a similarly low complication rate. Sonopet can allow for more controlled transcanal excision of broad-based exostoses in patients with severe obstruction.
authors.affiliation: *Department of Otolaryngology-Head and Neck Surgery †Department of Biomedical Engineering, Division of Neurotology and Skull Base Surgery, University of California, Irvine Medical Center, Irvine, California.
authors.forename: Yarah M
authors.initials: YM
authors.lastname: Haidar
authors.forename: Olubunmi
authors.initials: O
authors.lastname: Ajose-Popoola
authors.forename: Hossein
authors.initials: H
authors.lastname: Mahboubi
authors.forename: Omid
authors.initials: O
authors.lastname: Moshtaghi
authors.forename: Yaser
authors.initials: Y
authors.lastname: Ghavami
authors.forename: Harrison W
authors.initials: HW
authors.lastname: Lin
authors.forename: Hamid R
authors.initials: HR
authors.lastname: Djalilian
mesh_terms: D000328:Adult; D000368:Aged; D004424:Ear Canal / Q000601:surgery*; D004427:Ear Diseases / Q000601:surgery*; D005096:Exostoses / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology; D012189:Retrospective Studies; D016896:Treatment Outcome; D018058:Tympanic Membrane Perforation / Q000453:epidemiology / Q000209:etiology; D059708:Ultrasonic Surgical Procedures / Q000379:methods*