The document outlines various types of pelvic injuries categorized by anterior-posterior compression and lateral compression mechanisms. It details three progressive types of APC injuries (I, II, III) based on the severity of symphysis widening and associated injuries, as well as three levels of lateral compression injuries (I, II, III) involving fractures and dislocations. Each type indicates specific injuries to pelvic structures and the forces involved in their occurrence.

10. Type
Anterior Posterior
Compression
Lateral Compression Vertical Shear
1 APC I – Symphysis
widening < 2.5 cm
LC I - Compression fractures of
the pubic rami (superior pubic
ramus and inferior pubic ramus)
and ipsilateral anterior sacral
ala
VS - Posterior
and superior
directed force
2 APC II - Symphysis
widening > 2.5 cm. Anterior
SI joint diastasis. Disruption
of sacrospinous and
sacrotuberous ligaments
LC II - Rami fracture and
ipsilateral posterior ilium
fracture dislocation
3 APC III - SI dislocation with
associated vascular injury
LC III - Ipsilateral lateral
compression and contralateral
APC