supra-acetabular & iliac crest pelvic ex fix objectives –to define & describe the...
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Supra-Acetabular & Iliac Crest Pelvic Ex Fix
• Objectives– To define & describe the principles of pelvic
ring stability obtained with external fixation.– To apply a supra-acetabular pelvic external
fixator construct.– To apply an iliac crest pelvic external fixator
construct.– To differentiate the advantages &
disadvantages of a supra-acetabular frame compared to an iliac crest frame.
Principles Of Pelvic Ring Stability Obtained With External Fixation
• Pelvic ex fix may serve as an adjunct to resuscitation
• Complete (or partial) immediate pelvic ring mechanical stability
• Some pelvic ring deformities will not be rendered “stable” with pelvic ex fix alone
• Application can aide reduction in some ring injuries
• Pelvic ex fix can be definitive treatment in some pelvic ring injuries
Supra-Acetabular Ex Fix
• Ex fix pin placed at AIIS in the bone corridor from the anterior column toward the posterior column
• Pin runs in a “supra-acetabular” direction
• 5 or 6 mm pin ~200 – 350mm in length
• 1 or 2 pins on each side
• Single bar is acceptable, provided abdominal clearance
Supra-Acetabular Ex Fix
Outlet Obturator Oblique
Iliac Oblique
Inlet Obturator Oblique
Iliac Crest Ex Fix
• Ex fix pin placed at gluteal tubercle in the bone corridor from iliac crest toward the acetabulum
• Pin runs parallel to the tables of the ilium
• 5 or 6 mm pin ~200 – 350mm in length
• 1-3 pins on each side
• Usually 2-3 bars, must provide abdominal clearance
Iliac Crest Ex Fix
Iliac Crest Ex Fix
Lab Equipment
• Sawbone Model – – Diastasis & SI
Disruption #1301-21
• Reduction Clamps– Weber – Pointed
Reduction– Jungbluth – Screw
Reduction Clamp
• Implants– Small Frag Set w/
Long Screws (at least 40-60 mm)
– 4 – 6 hole pubic plate or recon plate
• Equipment– Drill / Driver– Recon Bending Pliers
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