Avascular Necrosis (AVN) – Reduced blood supply leading to bone death in knee region.
Avascular Necrosis (AVN) – Reduced blood supply leading to bone death in knee region. Introduction Our knees help us walk, run, and move freely. But sometimes, serious conditions like Avascular Necrosis (AVN) can damage the knee joint. AVN happens when the blood supply to a part of the bone reduces or stops , which causes the bone tissue to die. If not treated in time, this can lead to pain, stiffness, and even joint collapse. What is Avascular Necrosis (AVN)? AVN is also called osteonecrosis . It means “death of bone tissue due to lack of blood supply.” In the knee, AVN usually affects the femur (thigh bone end) or tibia (shin bone top) . Causes of AVN in the Knee Injury or Trauma – Accidents, fractures, or dislocations that block blood flow. Long-term Steroid Use – Medicines for asthma, arthritis, or other diseases can increase risk. Alcohol Abuse – Heavy drinking weakens blood vessels and bone health. Medical Conditions – Sickle cell disease, lupus,...