Knee osteoarthritis is the world's most common form of arthritis, affecting more than 365 million adults, according to the World Health Organization. Standard care starts with physical therapy, medication, and joint injections, but when those stop working, many patients face a difficult choice: undergo knee replacement surgery or continue living with pain. A new study describes a minimally invasive alternative called genicular artery embolization (GAE), which targets the abnormal blood vessels that develop around an inflamed joint.
During the procedure, an interventional radiologist guides a thin catheter into the knee's arteries and injects tiny, gelatin-based microspheres that dissolve within hours. These particles block selected vessels that contribute to inflammation and pain while preserving normal circulation. In the study, 194 patients with osteoarthritis-related knee pain underwent the procedure. At the one-year follow-up, 80% of patients reported clinically meaningful pain relief and improved mobility.
The findings, published in the journal Radiology, come from researchers at Charité – Universitätsmedizin Berlin. The lead investigator, Dr. Florian Nima Fleckenstein, said GAE targets the abnormal neurovascular environment around the joint and may be the first procedure that alters the course of the disease. However, the study did not demonstrate that GAE prevents cartilage deterioration or reverses existing joint damage, so whether it actually slows osteoarthritis progression remains an open question.