• Clinical science

General principles of fractures

Summary

A fracture is a partial or complete interruption in the continuity of bone. The most common causes are trauma and diseases (e.g., osteoporosis) that result in weakened bone structure. The latter results in pathologic fractures, which are fractures that would not usually occur if the bone structure was not weakened. Open fractures, in which the bone is exposed due to severe soft tissue injury, are associated with a significant risk of infection and poor wound healing. Fracture management can be conservative (e.g., cast or splint) or surgical, and generally involves anatomic reduction, fixation, and/or immobilization. Complications include acute nerve and vascular injury and compartment syndrome, as well as long-term complications such as avascular necrosis and nonunion.

Etiology

References:[1]

Classification

Fracture classification is based on the following:


References:[2][3]

Overview of common fractures

Common fractures in children

See “Pediatric fractures” for details.

Common fractures in adults

References:[2][4][5]

Clinical features

  • Pain, redness, and swelling at the site of injury
  • Deformity and axis deviation
  • Bone fragments penetrating the skin
  • Palpable step-off or gap
  • Bone crepitus
  • Concomitant soft tissue injuries
  • Neurovascular compromise below site of injury

Diagnostics

  • Clinical assessment
  • Imaging
    • X-ray
      • Conditions:
        • 2 views
        • 2 joints (if limb fracture)
        • 2 times (prereduction and postreduction)
      • Radiographic signs of a fracture include a radiolucent fracture line and cortical disruption
      • Describe fracture based on the anatomic location, alignment , angulation, and articular involvement (see “Classification” above for details)
      • X-ray imaging has a low sensitivity for detecting stress fractures
    • CT/MRI (not routine)
      • Indications: preoperative planning for complicated fractures, assessment of associated injuries, and inconclusive x-ray findings.

References:[6][7]

Treatment

General approach

Conservative fracture management

Surgical fracture management

  • Indications
    • Open fractures
    • Unstable fractures
    • Severe displacements (e.g., rotational deformities) and displaced fragments
    • Inadequate manual reduction and fixation
  • Procedure: anatomic reduction; of the fracture and subsequent fixation and immobilization using external or internal fixation devices (e.g., plates, screws, wires)

References:[6]

Complications

References:[3][8]

We list the most important complications. The selection is not exhaustive.