Burgess et al. report 162 patients with high-energy pelvic ring disruptions treated at a Level I trauma center from 1985 to 1988. The study applies the Young-Burgess force-vector classification to ask whether mechanism-based injury patterns predict hemorrhage, guide treatment selection, and reduce mortality. This is the primary clinical validation cohort for the Young-Burgess system.
The question that changes management on a trauma activation is not 'is the pelvis broken?' but 'which ligaments are torn and in which direction?'
APC-II disrupts the anterior SI, sacrotuberous, and sacrospinous ligaments — the checkreins that limit pelvic expansion. Without them, the retroperitoneal space is unrestrained and the patient can exsanguinate rapidly. This is why APC-II and APC-III go to acute external fixation within 4 hours (target under 2): you are restoring pelvic volume to re-establish tamponade, not simply fixing a fracture.
LC-I injuries have intact ligaments. The sacral compression fracture is impacted, the pelvis cannot expand, and hemorrhage is self-limiting. Bedrest is correct for most of these patients. Do not over-operate LC-I because the AP film looks dramatic.
The crescent fracture on the posterior iliac wing places you in LC-II or LC-III territory. If you see vertical displacement of the hemipelvis instead, you are looking at a VS injury. Same radiographic region, different instability pattern, different management algorithm.
Dalal et al. (J Trauma, 1989) independently validated the hemorrhage predictions of this classification, cementing the Young-Burgess system as the standard framework reproduced in every major pelvic trauma guideline since.
Burgess et al. report 162 patients with high-energy pelvic ring disruptions treated at a Level I trauma center from 1985 to 1988. The study applies the Young-Burgess force-vector classification to ask whether mechanism-based injury patterns predict hemorrhage, guide treatment selection, and reduce mortality. This is the primary clinical validation cohort for the Young-Burgess system.
The question that changes management on a trauma activation is not 'is the pelvis broken?' but 'which ligaments are torn and in which direction?'
APC-II disrupts the anterior SI, sacrotuberous, and sacrospinous ligaments — the checkreins that limit pelvic expansion. Without them, the retroperitoneal space is unrestrained and the patient can exsanguinate rapidly. This is why APC-II and APC-III go to acute external fixation within 4 hours (target under 2): you are restoring pelvic volume to re-establish tamponade, not simply fixing a fracture.
LC-I injuries have intact ligaments. The sacral compression fracture is impacted, the pelvis cannot expand, and hemorrhage is self-limiting. Bedrest is correct for most of these patients. Do not over-operate LC-I because the AP film looks dramatic.
The crescent fracture on the posterior iliac wing places you in LC-II or LC-III territory. If you see vertical displacement of the hemipelvis instead, you are looking at a VS injury. Same radiographic region, different instability pattern, different management algorithm.
Dalal et al. (J Trauma, 1989) independently validated the hemorrhage predictions of this classification, cementing the Young-Burgess system as the standard framework reproduced in every major pelvic trauma guideline since.