unstable pelvis
Pelvic fracture pattern involving disruption of both anterior and posterior pelvic ring structures, often with hemodynamic compromise.
Full Definition
An unstable pelvis refers to fracture patterns that disrupt both the anterior and posterior elements of the pelvic ring, resulting in mechanical instability and often massive bleeding from torn pelvic vessels and bone surfaces. These high-energy injuries are classified using systems like Young-Burgess or Tile classification and frequently require immediate stabilization with pelvic binders, external fixation, or angioembolization to control hemorrhage. Mortality rates are high due to associated injuries and blood loss.
Usage
Usage note: Two words. Distinguish from general 'pelvic fracture' which may be stable. Often requires specification of fracture classification system.
In Context
- "The unstable pelvis was temporarily stabilized with a pelvic binder in the trauma bay." — Emergency documentation
- "CT angiography revealed active bleeding from internal iliac vessels associated with the unstable pelvis." — Radiology report