- based on the assessment of stability;
- lesions are graded as Type I, Type II, or Type III depending on degree of instability;
- Bucholz noted that on postmortem dissection of pts w/ pelvic fractures that all injuries to pelvic ring had some injury to both anterior and posterior portions of the pelvis;
- Type I:
- injuries for which the roentgenograms reveal only anterior rami frxs demonstrated at least hemorrhage & partial disruption of posterior SI ligaments;
- Type II:
- lesion is similar to the AP compression lesion;
- it is characterized by the presence of anterior instability and partial posterior instability.
- Type III:
- lesion demonstrates complete anterior and posterior instability;
- it may be due to vertical shear, Lateral Compression, or complex mechanism of injury;
- instability is secondary to both the bony and the ligamentous disruption of pelvic ring;
- degree of ligamentous disruption is a key to stability because fracture alone will not produce instability without associated displacement and ligamentous disruption
Original Text by Clifford R. Wheeless, III, MD.
Last updated by Data Trace Staff on Thursday, September 6, 2012 2:03 pm