History
- History of fall with hyper-flexion of knee
- Not necessarily painful after event
- Swelling
- Bruising
- Abnormal patella position – high or low
- Unable to straighten leg actively
- Quads dysfunction
- Difficulty with stairs
Signs
- Limp
- Swelling
- Deformity – possible divot in distal quads/defect below patella
- Bruising
- Unable to straight leg raise
M.A. & J.G. 23-05-24
Secondary care referral
- Urgent referral – may need urgent surgical repair
Primary care investigations
- X-Ray – A-P and lateral of both knees for comparison of patella position
