Subtalar dislocation

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Background

  • Usually high-energy trauma
  • 80% medial dislocations
  • 25% open, with lateral more likely
  • Associated with fractures ~50%

Clinical Features

Medial

  • Foot displaced to supination

Lateral

  • Foot displaced to pronation

Differential Diagnosis

Foot diagnoses

Acute

Subacute/Chronic

Evaluation

Talus and subtalar joint
  • Xrays

Medial

  • Talar head superior to navicular on lateral XR

Lateral

  • Talar head inferior to navicular on lateral XR

Management

  • Closed reduction and short leg NWB cast first-line, with ortho consult
  • Reduce with ankle plantarflexed, then hindfoot inversion/eversion
  • Requires CT after reduction for associated fractures

See Also

References


Sub-Talar Dislocation

Background

  • Orthopedic emergency

Evaluation

  • Plain radiographs usually sufficient

Management

  • Immediate ortho consultation and reduction