title: Computer-assisted Femur Fracture Reduction.
abstract: BACKGROUND
  When using intramedullary nailing of femur fractures false axis alignment or malrotation is the greatest deterrent to successful reduction often causing extended x-ray exposure and the need to revert to an open procedure. The aim of this study was to demonstrate the advantages of using a trauma navigation system during intramedullary nailing of femur fractures.
  
  
  METHODS
  A fluoroscopic navigation unit was used and successful closed fracture reduction, x-ray exposure, and operation time were measured. Between 2004 and 2007 19 patients receiving intramedullary nailing of femur fractures using a Stryker trauma navigation system were included in the study. The results were compared to 10 conventionally operated femur fractures between 2003 and 2006.
  
  
  RESULTS
  The study demonstrated an important reduction of radiation time and less needs for reverting to open reduction.
  
  
  CONCLUSIONS
  Based on these findings we conclude that the use of a trauma navigation system during fracture reduction has clear advantages. These are based primarily on its ability to provide 3-dimensional viewing of the fracture during the reduction procedure. This eliminates the need for multiple positioning adjustments of the x-ray C-arm from horizontal to vertical for better viewing and in doing so reduced radiation time and needs for open reduction.
authors.affiliation: Department of Trauma, Hand, and Reconstructive Surgery, Johann-Wolfgang-Goethe University, Frankfurt/Main, Germany. J.frank@trauma.uni-frankfurt.de.|Department of Trauma, Hand, and Reconstructive Surgery, Johann-Wolfgang-Goethe University, Theodor-Stern-Kai 7, 60590, Frankfurt/Main, Germany. J.frank@trauma.uni-frankfurt.de.
authors.forename: Johannes
authors.initials: J
authors.lastname: Frank
authors.affiliation: General, Visceral, and Transplantation Surgery, Surgical Clinic, University of Heidelberg, Heidelberg, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Gritzbach
authors.affiliation: Department of Trauma, Hand, and Reconstructive Surgery, Johann-Wolfgang-Goethe University, Frankfurt/Main, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Winter
authors.affiliation: Department of Trauma, Hand, and Reconstructive Surgery, Johann-Wolfgang-Goethe University, Frankfurt/Main, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Maier
authors.affiliation: Department of Trauma, Hand, and Reconstructive Surgery, Johann-Wolfgang-Goethe University, Frankfurt/Main, Germany.
authors.forename: Ingo
authors.initials: I
authors.lastname: Marzi
keywords: Femur nailing; Fluoroscopy; Fracture reduction; Navigation; Radiation
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