Knee Replacement Alternatives: How Genicular Artery Embolization Works
October 12, 2026
If your knee has been aching for years and a surgeon has finally said the words “knee replacement,” you’re probably doing what most people do next: looking for a way around it. Surgery means months of recovery, physical therapy, and a recuperation period that’s hard to fit in the routine of life. You’re in good company if you want other options, especially a knee pain treatment that doesn’t require surgery.
One option that has gained real traction over the past decade is genicular artery embolization, often shortened to GAE. It’s a strong consideration for people with knee osteoarthritis who want a middle ground between medication and total knee replacement.
Quick Answer: Genicular artery embolization (GAE) is a minimally invasive, image-guided treatment for knee pain caused by osteoarthritis. An interventional radiologist uses a catheter to reduce abnormal blood flow feeding inflammation around the knee, rather than treating the joint’s cartilage directly. GAE is a good fit for patients who still have knee pain despite conservative treatment and want to delay or explore alternatives to knee replacement.
What happens during the genicular artery embolization procedure?
GAE is performed by an interventional radiologist, a physician with more than a decade of specialized training. During the procedure, the radiologist threads a thin catheter through a small puncture in the wrist or groin. Using live X-ray imaging, they guide it into the genicular arteries, the small vessels that branch around the knee and feed the joint lining.
Once the catheter reaches the target vessels, the physician injects tiny particles that lodge in the abnormal, newly formed blood vessels and block them off. Healthy blood flow to the rest of the knee is preserved; only the excess vessels feeding inflammation are shut down.
Patients are awake during the procedure, with local anesthetic at the puncture site. The whole procedure typically takes under an hour, with no hospital stay required in most cases. Patients go home the same day with a small band-aid over the access site and can usually resume light activity within a day or two.
Who is a candidate for genicular artery embolization?
GAE is a great option for those who:
- Have knee osteoarthritis
- Aren’t good surgical candidates yet, whether because of age, other health conditions, or simply not being ready to commit to a replacement and its recovery
- Want to avoid surgery
The evidence behind GAE
GAE has moved from early case series to controlled, published research. Here’s a look at some of the key studies shaping how interventional radiologists understand its safety and effectiveness:
| Study | What It Studied | What They Found |
| GRAVITY Study (2026) | Followed GAE patients for 2 years to see how they did over time | Half of the patients had their knee pain and stiffness cut in half or more. See the study |
| SHAM-PAIN Trial (2026) | Compared real GAE to a “fake” procedure, so researchers could see if GAE itself was truly helping (not just the placebo effect) | Patients who had the real procedure felt significantly more pain relief than those who didn’t, just one month later. And it was safe. (DOI: 10.1016/j.jvir.2026.107990, PMID: 41520820) |
| Cost Study (2024) | Compared the cost and value of GAE to other common knee treatments, like steroid shots and nerve treatments | GAE was more likely to be the better value option overall, especially as more long-term data comes in. (DOI: 10.2214/AJR.24.31710, PMID: 39320355) |
| GENESIS Study (2024) | Checked in on GAE patients 2 years after their procedure | Most patients still had real, lasting pain relief and better movement, two full years later. (DOI: 10.1007/s00270-024-03752-7, PMID: 38819473) |
Every patient is different. How well GAE works can depend on things like how severe your arthritis is and your specific treatment plan. That’s why it’s worth talking with an interventional radiologist about your own case.
What are the side effects of genicular artery embolization?
Reported side effects include temporary skin discoloration near the injection site and mild post-procedural pain lasting a few days.
Common questions about genicular artery embolization
Is genicular artery embolization an alternative to knee replacement?
For some patients, yes. Genicular artery embolization may be an option for people with knee osteoarthritis who still have pain despite conservative treatment but aren’t ready for, or aren’t good candidates for, knee replacement surgery. GAE doesn’t repair damaged cartilage or replace the joint, so it isn’t a substitute for surgery in every case. The goal is to reduce pain and inflammation.
How long does genicular artery embolization take?
Genicular artery embolization typically takes under an hour, though times can vary. Patients go home the same day.
What is recovery like after genicular artery embolization?
Recovery is much shorter than recovery after knee replacement. Most patients return to light activity within a day or two, with some soreness or bruising around the access site or knee.
How long does pain relief from genicular artery embolization last?
Results vary by patient, and research into long-term effectiveness continues. Published studies, including the GENESIS study above, have reported pain relief and functional improvement lasting at least two years in many patients. Your interventional radiologist can help determine whether your type and severity of knee osteoarthritis make you a good candidate.
Does insurance cover genicular artery embolization?
Coverage varies by insurer and plan. Please check with our team to see if genicular artery embolization would be covered by your insurance plan.
Schedule a consultation with NVP’s knee pain experts
The team at National Vascular Physicians is among the most experienced in the region, having performed thousands of embolization procedures. We operate five outpatient centers for your convenience and within these locations we have four expert knee specialists: Dr. Adam Guyer, Dr. Alex Kim, Dr. Emmett Lynskey, and Dr. Avinash Pillutla.
Our outpatient locations are comfortable and convenient, and we consistently deliver a high level of patient service. Contact the clinic closest to you and schedule a consultation to find out if GAE is right for you.
