Geniculate Artery Embolisation

What is geniculate artery embolisation?

Geniculate artery embolisation (GAE) is a minimally invasive, image-guided procedure for painful knee osteoarthritis. In osteoarthritic knees, abnormal networks of tiny new blood vessels grow in the inflamed joint lining, and with them grow new nerve endings — a significant source of the pain. GAE blocks (embolises) these abnormal vessel networks through a catheter, reducing the inflammation and the pain signal, while sparing the knee’s normal circulation as far as possible.

Who it may suit

GAE is considered for people with mild-to-moderate knee osteoarthritis whose pain persists despite conservative care — physiotherapy, weight management, analgesia, injections — and who are either not ready for knee replacement or not suitable for major surgery. It does not replace a knee replacement where one is truly indicated; it is an option in the gap before that point.

What the procedure involves

Through a small puncture in the groin or upper thigh, a fine catheter is steered under X-ray guidance into the geniculate arteries around the knee. The abnormal vessel clusters are identified with contrast and embolised with microscopic particles. The procedure takes roughly one to two hours, is done under local anaesthesia with sedation, and is typically a day procedure.

What to expect afterwards

Pain relief develops over days to weeks as the inflammation settles. Clinical studies to date report pain relief in many suitably selected patients, but GAE is a comparatively new procedure and the long-term evidence is still accumulating; outcomes vary between individuals. Patient selection on imaging is what matters, and the current state of the evidence is part of the consultation discussion. Temporary skin discolouration or a mild post-procedure ache can occur and settles; as with any embolisation, non-target embolisation is an uncommon but recognised risk.

When to consider assessment

If knee osteoarthritis pain is limiting daily life despite conservative treatment, and you want to understand where GAE fits alongside injections and joint replacement for your specific knee, an imaging-based assessment can answer whether the vessel pattern is suitable.