Overview
How to Assess
- Move the knee joint passively through flexion and extension. Note whether any clicks, cracks, snaps or clunks are present.
Patellar Crepitus
How to Assess
- Listen for a 'crunching' sound during passive movement of the knee.
Causes of Patellar Crepitus
- Chondromalacia
- Patellar fracture
Snapping Knee Joint
How to Assess
- Listen for a sudden 'popping' sound on passive movement of the knee joint.
Causes of Snapping Knee Joint
- Dislocation - tibio-fibular joint, patello-femoral joint
- Discoid meniscus
- Menisceal cyst
- Snapping of tendons
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