Supracondylar Femur Fractures Workup

Updated: Jun 29, 2020
  • Author: Steven I Rabin, MD, FAAOS; Chief Editor: Jeffrey D Thomson, MD  more...
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Workup

Imaging Studies

Patients with supracondylar femur fractures require anteroposterior (AP) and lateral radiographs of the entire femur to assess associated fractures and deformity; however, views centered at the knee are also important to assess the specific fracture pattern.

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Staging

No specific staging system has been developed for supracondylar femur fractures; however, the Arbeitsgemeinschaft für Osteosynthesefragen (AO)-Association for the Study of Internal Fixation (ASIF) and Orthopaedic Trauma Association (OTA) classification systems help the surgeon determine appropriate treatment options.

The AO-OTA classification divides fractures of the distal end segment of the femur into three main types, as follows [22] :

  • A - Extra-articular
  • B - Partial articular
  • C - Complete articular

Type A is further divided into the following three subtypes:

  • A1 - Avulsion fracture
  • A2 - Simple fracture
  • A3 - Wedge or multifragmentary fracture

Type B is further divided into the following three subtypes:

  • B1 - Lateral condyle, sagittal fracture
  • B2 - Medial condyle, sagittal fracture
  • B3 - Frontal/coronal fracture

Type C is further divided into the following three subtypes:

  • C1 - Simple articular, simple metaphyseal fracture
  • C2 - Simple articular, wedge or multifragmentary metaphyseal fracture
  • C3 - Multifragmentary articular fracture, simple, wedge or multifragmentary metaphyseal fracture
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