What is the most significant complication associated with fractures or dislocations of knee?

Popliteal artery injury

The popliteal artery is the major artery that supplies blood to the lower leg and foot. It runs behind the knee joint, and it is vulnerable to injury in cases of knee fractures or dislocations.

Popliteal artery injury can lead to ischemia (lack of blood flow) in the lower leg and foot, which can cause tissue damage and even amputation. Symptoms of popliteal artery injury include:

* Pain behind the knee

* Swelling in the lower leg and foot

* Coolness in the lower leg and foot

* Loss of sensation in the lower leg and foot

* Pulselessness in the lower leg and foot

If you experience any of these symptoms, it is important to seek medical attention immediately.