Knee Dislocation

It includes dislocation of knee cap (patella) or dislocation of shin bone (tibia & fibula) in relation to thigh bone (femur).

Knee dislocation may be associated with ligament injuries (ACL, PCL, MCL, LCL) & Meniscal (Medial or Lateral) Tears. Vascular & Nerve injuries are also common.

Causes
  • Road traffic injuries
  • Sport injuries
  • Falls
Symptoms
  • Pain
  • Swelling
  • Deformity
  • Inability to move the joint
  • Inability to weight bear
  • Numbness & tingling (when associated with nerve injury)
  • No distal Pulses (when associated with vascualr injury)
Investigations
  • X-ray
  • MRI
  • Doppler scan/ CT Angiogram (to rule out vascular injury)
  • EMG/NCV (to rule out nerve injury)
Treatment
Non-Surgical
  • Closed reduction under Aneathesia.
  • Anlgesics
  • Immobilisation – cast / brace 4-6 weeks
Surgical
  • Surgery when closed manipulation fails, when associated with fracures , vascularor nerve injuries.
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