title: A cadaver study of the trochanteric pelvic clamp for pelvic reduction.
abstract: OBJECTIVE
  The purpose of this study is to evaluate the ability of the trochanteric pelvic clamp to reduce anterior-posterior compression pelvic ring disruptions.
  
  
  METHODS
  Eight fresh-frozen cadavers underwent sequential disruption of the pelvic ring to represent both anterior-posterior compression type II (APC II) and anterior-posterior compression type III (APC III) injury patterns. Reduction with the trochanteric pelvic clamp was performed. Prereduction and postreduction anterior/posterior pelvic displacements were determined radiographically.
  
  
  METHODS
  Institutional research laboratory.
  
  
  METHODS
  Application of a trochanteric pelvic clamp to reduce a pelvic ring disruption.
  
  
  METHODS
  Radiographic measurements of anterior and posterior pelvic displacement were evaluated and compared to similar values after reduction with the trochanteric pelvic clamp.
  
  
  RESULTS
  The application of the trochanteric pelvic clamp to simulated APC II and APC III pelvic injuries in a cadaver model demonstrated a significant reduction of the anterior pubic diastasis and the posterior disruption of the sacroiliac joint. Anterior pelvic vertical displacement did not improve with application of the trochanteric pelvic clamp. Measurement of symphysis diastasis for APC II injuries was 4.07 cm (+/-0.31) prereduction and 0.38 cm (+/-0.18) postreduction, (P < 0.001); for APC III injuries, 6.32 cm (+/-0.84) prereduction and 1.24 cm (+/-1.01) postreduction, (P < 0.001). For posterior sacroiliac disruptions, APC II injury measurements were 1.81 cm (+/-0.35) prereduction and 0.69 cm (+/-0.32) postreduction (P < 0.001); for APC III injuries, 3.81 cm (+/-1.06) prereduction and 1.86 cm (+/-0.82) postreduction (P = 0.002). At the symphysis pubis, APC II vertical displacement was 0.32 cm (+/-0.36) prereduction and 0.30 cm (+/-0.38) postreduction (P < 0.740); for APC III injuries, 0.5 cm (+/-0.31) prereduction and 0.88 cm (+/-0.53) postreduction (P < 0.098).
  
  
  CONCLUSIONS
  The application of the trochanteric pelvic clamp is reliable for obtaining reduction of anterior-posterior compression pelvic injuries in a cadaver model.
authors.affiliation: Department of Orthopedic Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio 45267-0212, USA. michael.archdeacon@uc.edu
authors.forename: Michael T
authors.initials: MT
authors.lastname: Archdeacon
authors.forename: Christian
authors.initials: C
authors.lastname: Safian
authors.forename: T Toan
authors.initials: TT
authors.lastname: Le
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D050723:Fractures, Bone / Q000628:therapy*; D006801:Humans; D007103:Immobilization / Q000295:instrumentation* / Q000379:methods; D008297:Male; D010384:Pelvic Bones / Q000293:injuries*; D016059:Range of Motion, Articular; D016896:Treatment Outcome