Yosef Golowa, MD, FSIR Interventional Radiology · Minimally Invasive Specialist
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Is genicular artery embolization legitimate? What the evidence shows

GAE is a recognised procedure supported by randomised trials and multi-year follow-up, not a fringe treatment. Here is what the published evidence does and does not establish.

Genicular artery embolization for chronic knee pain

By Yosef Golowa, MD, FSIR · Published May 19, 2026 · 2 min read

Any newer procedure attracts scepticism, and it should. Genicular artery embolization is a legitimate and promising minimally invasive treatment for knee pain from osteoarthritis, studied at reputable institutions and supported by a growing body of evidence. Research is ongoing, and the long-term picture is still being established.

What the trials show

  • A randomised controlled trial in 2022 compared GAE with a sham procedure. At 12 months, patients who received GAE showed a statistically significant reduction in pain scores.
  • A prospective single-centre pilot study of 12 patients with persistent pain after total knee replacement showed improvement in pain scores following GAE.
  • The GAUCHO trial, a single-centre randomised controlled trial, reported a one-year cumulative clinical success rate of 60% or greater, measured with the WOMAC and KOOS scoring systems.

How it works

GAE targets the abnormal blood vessels that grow in an arthritic knee, a process called angiogenesis. Reducing those vessels is thought to relieve pain by decreasing synovial inflammation and the ingrowth of new nerve fibres that accompanies it.

Pain reduction

Multiple studies report significant pain reduction after GAE. In one study, patients were followed for up to two years with substantial improvement in pain and function compared with baseline. GAE appears particularly effective in patients with mild to moderate osteoarthritis, Kellgren-Lawrence grades 1 and 2.

Safety profile

GAE has proven safe, with mild complications reported. Potential side effects include:

  • Self-limited skin discoloration.
  • A temporary increase in pain immediately after the procedure.
  • Rare cases of nerve injury, bone infarction, or non-target embolization.

What is still being studied

A large-scale trial of up to 110 participants is underway to further evaluate the use of a permanent embolic agent. Other work is examining whether pre-procedure MRI findings can predict outcomes and improve patient selection.

The honest conclusion

GAE is a real procedure with real evidence behind it, offering a minimally invasive option for people with knee osteoarthritis who have not responded to conservative treatment. More research is needed to establish long-term efficacy and to identify who benefits most.

Experience is key. GAE demands technical skill and detailed anatomical knowledge, and you want an interventional radiologist with substantial experience in embolization techniques. Dr. Golowa was among the first physicians in New York City to perform GAE for knee pain.

To learn more, call our office at (212) 991-9991 or book an appointment.

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