title: Ultrasound-induced corneal incision contracture survey in the United States and Canada.
abstract: OBJECTIVE
  To ascertain factors associated with corneal incision contracture (wound burn) secondary to phacoemulsification in the United States and Canada.
  
  
  METHODS
  John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA, and University of Toronto, Toronto, Ontario, Canada.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Through state and provincial societies, members were queried as to cataract surgery practices during the previous 3 years as well as the specifics associated with each case of wound burn, if any, encountered during that period.
  
  
  RESULTS
  Eight hundred forty-two cataract surgeons reported on 920,095 surgeries and 341 wound burns (raw incidence 0.037%). After a multivariate analysis, the wound burn incidence was significantly inversely associated with the surgeon's surgical volume (45% decrease per doubling of volume; 95% confidence interval, 38%-55%; P<.001), the surgical approach (P<.001), and the ophthalmic viscosurgical device (OVD) used (P=.004). Machine or ultrasound modality used, region of the U.S. or Canada, and incision size were not related to wound burn.
  
  
  CONCLUSIONS
  Phacoemulsification-induced wound burn can be reduced by experience, by the approach used in nucleus disassembly, by choice of OVD, and most important, by not using ultrasound when the anterior chamber is filled with OVD.
authors: Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah 84132, USA.
authors: Tyler
authors: T
authors: Sorensen
authors: Clara C
authors: CC
authors: Chan
authors: Michael
authors: M
authors: Bradley
authors: Rosa
authors: R
authors: Braga-Mele
authors: Randall J
authors: RJ
authors: Olson
mesh_terms: D002170:Canada / Q000453:epidemiology; D003286:Contracture / Q000453:epidemiology* / Q000209:etiology; D003315:Cornea / Q000601:surgery; D003316:Corneal Diseases / Q000453:epidemiology* / Q000209:etiology; D065306:Corneal Injuries; D003430:Cross-Sectional Studies; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D007431:Intraoperative Complications; D009885:Ophthalmology / Q000706:statistics & numerical data; D018918:Phacoemulsification / Q000009:adverse effects* / Q000295:instrumentation; D012307:Risk Factors; D012955:Societies, Medical / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology; D055675:Viscosupplements / Q000008:administration & dosage; D014945:Wound Healing
chemical_list: D055675:Viscosupplements