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Patellar dislocation (Diagnosis (History (DH
Meds, allergies, FH
…
Patellar dislocation
Diagnosis
Examination
Musculoskeletal examination
Visible deformed knee, flexion, lateral patella,
may have associated haemarthrosis
Hip and ankle exam (nil)
Neurovascular exam (nil)
Investigations
Imaging
X-ray knee: lateral patella, check for fracture
History
-
FH
Orthopedic disorders,
joint laxity
-
SH
Living arrangements,
school, sports activity
PC/HPC
Painful, deformity of knee following
twisting injury, typically sporting
Management
Conservative
Information, advice, support
Referral to ortho (reduction, investigation if 2+ dislocations)
Physical reduction (firm medial pressure while extending knee)
Immobilisation (cast, brace, splint)
Physiotherapy (strengthening exercises)
Surgical
Ligament reconstruction
Indication: ligament damage,
persisting instability
Medical
Analgesia
Indication: pain
E.g. paracetamol, NSAIDs
Clinical
presentation
Painful, flexed knee
with lateral deformity
-
-
-
Pathophysiology
Defect
Twisting of lower leg plus quads contraction,
causing lateral dislocation