Pelvic Trauma Radiology November 2001
Classification stable vs. unstable breaks in the ring posterior arch vs. anterior arch OR both single bone without break of ring acetabular mechanism – LC, AP, VS
Stable low speed mechanisms falls from low height athletic injuries most common – pubic ramus/body Other – transverse sacral, coccyx, apophyseal/avulsion injuries
Unstable involve both anterior and posterior arches mechanisms high speed MVC’s or fall from height lateral compression transverse pubic rami #, iliac wing, sacrum anterior compression “open-book” injury, longitudinal rami # vertical shearing forces SI joint subluxation/dislocation, symphyseal diastasis
associated injuries pelvis is boney ring – find one fracture, look for another subluxation/dislocation SI jt or pubic symphysis acetabulum/femoral head/joint fragments pelvic contents bladder/urethra, rectalsigmoid, vagina/uterus, vasculature, nerve
acetabular types associated with hip dislocation posterior ilioischial column transverse iliopubic associated with hip dislocation
avulsions ASIS – sartorius AIIS – rectus femoris ischial tuberosity – hamstring (kicking)