Avascular necrosis
Avascular necrosis, also called osteonecrosis is a condition in which bone death occurs because of inadequate blood supply to it. Lack of blood flow may occur when there is a fracture in the bone or a joint dislocation that may damage nearby blood vessels. Chronic use of high doses of steroid medications and heavy alcohol consumption are the two main risk factors of avascular necrosis. Initially, small breaks appear in the bone that may eventually collapse. Hip joint is most commonly affected, however the knee and shoulder may also be involved.
The symptoms appear all of a sudden if it’s a result of an injury. In other situations, the pain and stiffness may gradually appear over a period of time. Typically, avascular necrosis causes pain and restricted range of motion in the joint affected. Your doctor will diagnose the condition using imaging tests such as X-rays, MRI scan and bone scan that help rule out other causes of joint pain.
The treatment for avascular necrosis aims at preventing further loss of bone and it depends on the bone damage that has occurred already. Conservative treatment would reverse early stages of avascular necrosis whereas surgical treatment may be required in more advanced stages.
Conservative approach
- Medications:Non-steroidal anti-inflammatory drugs (NSAID’S) may be prescribed that help control your pain and swelling
- Rest:Restriction of physical activities and use of crutches to decrease weight bearing on your joints may be beneficial
- Exercises:Regular exercises that improve your range of motion may be done
- Electrical stimulation:Electric currents promote new bone growth. They can be applied directly to the area of damage or through electrodes fixed on skin. It helps replace the damaged bone
Surgical Treatment
- Joint replacement: Joint replacement surgery is done as a last resort when the bone has collapsedneeding artificial replacement
