The knee joint is supported by strong ligaments and muscles. The knee cap lies in front of it. Any of these structures may be injured by direct blow, strain, or violent twist.
The condition is diagnosed by the following features.
- History of a recent trauma to the knee.
- Pain the knee joint.
- Acute pain on attempting to straighten a bent, locked knee.
- Rapid swelling of the knee joint.
- Place the victim in supine position, with the knee and leg in the most comfortable position.
- Bandage a soft padding around the knee.
- Shift him to a hospital immediately on a stretcher.
- Do not let the victim walk.
- Do not attempt to force the knee straight.
- Do not give the victim anything to eat or drink.