- See:
Radiology of the Acetabulum:
- Discussion:
- instability = cephalic displacement of posterior
sacroiliac complex
of at least 5-15 mm on
inlet and
outlet views;
- look for gap (rather than impaction) posteriorly, & frx of 5th lumbar
transverse process or avulsion of sacrospinous ligament;
- Pertinent Radiographs:
- AP view
- Inlet and
Outlet Views:
- Judet View
- Push-Pull Views:
- used to evaluate dynamic displacement of the pelvis;
- these views are obtained as in
outlet view with the examiner
pushing on the femur for one view and pulling on it for the other;
- Sacroiliac Views:
- used to visualize the
sacroiliac joints;
- pt is positioned as for Judet views w/ central beam directed toward
sacroiliac joint;
- only CT scan of the pelvis gives well detailed image of
SI joint;
- neither the iliac or obturator oblique radiographs shows this well;
- Lateral View:
- required if
sacral frx is suspected;
- technique is identical to lateral view of lumbar spine except that it is centered on the sacrum;
- Arteriography:
- arteriography is probably indicated for patients w/ concomitant pelvic frx and hemodynamic instability,
especially when there is frx displacement thru the greater sciatic notch;
Pelvic and Lower Extremity Trauma--Symposium: The Role of Standard
Roentgenograms in the Evaluation of Instability of Pelvic Ring Disruption.
The role of standard roentgenograms in the evaluation of instability of
pelvic ring disruption.
