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, blood clotting disorders.
Radiation or Chemotherapy – Can damage blood supply to bones.
Unknown Reasons – Sometimes AVN develops without a clear cause.

Symptoms of AVN in the Knee

Pain in the knee (especially while walking or climbing stairs).
Swelling around the joint.
Stiffness and reduced movement.
Pain that increases at night or with weight-bearing activities.
In advanced stages, collapse of the bone, leading to arthritis.

Diagnosis

Doctors use a combination of:

Physical Examination – Checking pain, swelling, and movement.
X-ray – To see bone structure changes.
MRI Scan – Most accurate test, detects AVN in early stages.
CT Scan – For detailed bone damage.

Treatment Options for AVN in the Knee

🟢 Non-Surgical (Early Stages)

Rest and avoiding stress on the knee.
Pain medicines and anti-inflammatory drugs.
Physiotherapy to keep joint flexible.
Using crutches or braces to reduce pressure.
Injections (PRP or Hyaluronic Acid) in some cases.

🔵 Surgical (Advanced Stages)

Core Decompression – Drilling small holes to increase blood supply.
Bone Grafting – Replacing dead bone with healthy bone tissue.
Osteotomy – Reshaping the bone to reduce stress on damaged area.
Knee Replacement – If the joint is badly damaged, replacement may be the only option.

Prevention Tips

Limit alcohol intake.
Avoid unnecessary long-term steroid use.
Maintain a healthy lifestyle with exercise and good diet.
Treat underlying conditions like diabetes, lupus, or blood disorders.

✅ Summary

Avascular Necrosis (AVN) of the knee is a serious condition where reduced blood supply leads to bone death. It starts with pain and stiffness and, if untreated, may result in joint collapse. Early diagnosis and treatment can help preserve the natural knee, while advanced cases may require surgery or knee replacement.

https://drravikgupta.com

Search This Blog

ANU INFOTECH