The fourth stage of AVN, also known as avascular necrosis of the femoral head, is the most severe stage of the condition. In this stage, the bone in the femoral head has become completely necrotic or dead, leading to severe pain and instability. The femoral head is unable to bear any weight, thus making walking impossible.
At this stage, the femoral head is unable to be repaired and must be replaced. The most common surgical treatment for this stage is a total hip replacement, which involves replacing the entire femoral head and neck with a prosthetic device. This procedure is often accompanied by post-operative physical and occupational therapy to help the patient regain strength and mobility.
In addition to surgery, lifestyle modifications such as weight loss, quitting smoking, and avoiding heavy lifting can help reduce the risk of developing AVN. It is also important to maintain a healthy diet and exercise regularly to ensure good bone health.
AVN is a serious condition that can lead to severe pain and disability if not properly treated. Understanding the different stages of AVN can help patients and their physicians make informed decisions about treatment. If you are experiencing any symptoms of AVN, it is important to talk to your doctor right away.