Home / Procedures / Genicular Artery Embolization
Featured Procedure · Knee

Genicular Artery Embolization

An outpatient procedure that targets the abnormal blood vessels feeding inflammation in your knee — without an incision, without general anesthesia, and without the recovery of a knee replacement.

Procedure type: Image-guided, minimally invasive
Time at office: ~2 hours
Recovery: 2–3 days
Performed by: Board-certified IR
~2 hrs
Total time at our office, including prep and recovery
No
General anesthesia required — sedation only, you remain awake
2–3 days
Most patients return to normal daily activity within
~85%
Of patients in published studies report meaningful pain relief at one year
What is GAE

The treatment that addresses the cause, not just the symptom.

Anatomical diagram of the knee showing genicular arteries and inflammatory neovessels targeted by GAE Medical illustration for Valley Joint Pain Center patient education. · genicular artery inflamed synovium

Fig. 01The genicular arteries — a network of small blood vessels supplying the knee joint capsule. In osteoarthritis, these vessels proliferate abnormally and feed chronic inflammation.

In an osteoarthritic knee, the lining of the joint — the synovium — becomes chronically inflamed. To sustain that inflammation, the body grows new abnormal blood vessels, called neovessels, that feed into the joint. These neovessels carry inflammatory cells, pain signals, and the nerve fibers that make osteoarthritis hurt the way it does.

Genicular Artery Embolization works upstream. Through a small catheter — about the diameter of a strand of angel hair pasta — we deliver microscopic particles directly into those abnormal vessels and gently close them off. The cartilage damage doesn't reverse, but the chronic inflammation that drives your pain has its fuel cut off.

The procedure has been studied at major academic medical centers including Johns Hopkins and the Cleveland Clinic, and is now offered at a growing number of specialty centers across the country.

The procedure, hour by hour

What actually happens on the day of your treatment.

You'll arrive in the morning, leave in the afternoon, and be home for dinner. Here's the sequence — there are no surprises in this room.

7:30 – 8:00 AM · Arrival

Check-in & preparation

You'll change into a gown, meet the nurse, and have a small IV placed for sedation. Final review of your imaging and any questions you've thought of overnight.

8:30 – 9:00 AM · Mapping

Vessel mapping

Using a small catheter inserted through a numbed spot in your upper thigh or wrist, we use real-time X-ray to map the genicular arteries supplying your knee.

9:00 – 10:00 AM · Treatment

Targeted embolization

We navigate the catheter into the abnormal vessels and deliver microscopic particles — too small to see with the naked eye — that close off the neovessels feeding the inflammation.

10:00 AM – Noon · Recovery

Observation & discharge

You'll rest in our recovery area for 1–2 hours while the sedation wears off. A friend or family member drives you home. You walk out on your own.

Candidacy

Who GAE works for — and who it doesn't.

No procedure is right for everyone. Honesty about who's likely to benefit — and who isn't — is more useful to you than a sales pitch. Here's the candid version.

Often a good fit for GAE

  • You have chronic knee pain from osteoarthritis confirmed on imaging
  • You've tried conservative treatments (PT, NSAIDs, injections) without lasting relief
  • Your symptoms have lasted more than 6 months
  • You're not yet ready for, or not a candidate for, knee replacement surgery
  • You want to delay or avoid joint replacement while staying active
  • Your imaging shows mild to moderate osteoarthritis (Kellgren-Lawrence 2–3)

Probably not the right procedure

  • You have severe end-stage osteoarthritis with bone-on-bone changes
  • Your pain is mostly mechanical (locking, catching) rather than inflammatory
  • You have an active infection or untreated peripheral artery disease
  • You have a known allergy to iodinated contrast that can't be premedicated
  • Your knee pain is referred from your hip or back rather than the knee itself
  • You're seeking a one-time cure rather than meaningful, lasting relief
The evidence

What the research actually shows.

GAE has been studied in over a decade of clinical trials at major academic medical centers. The numbers below come from peer-reviewed research, not marketing material.

JVIR · 2022
~85%

Of patients reported meaningful pain reduction at 12 months follow-up across multiple cohort studies.

Cardiovasc Intervent Radiol · 2021
~60%

Average reduction in pain scores (visual analog scale) at 6 months in moderate OA patients.

RSNA · 2023
< 2%

Rate of significant procedural complications in published series — among the lowest of any IR procedure.

A note on evidence: GAE is not a cure for osteoarthritis. The cartilage damage that underlies the disease is not reversed. What the research demonstrates is meaningful, durable pain reduction in appropriately selected patients — generally those with mild to moderate disease who haven't found lasting relief from conservative care. Long-term randomized trials are ongoing, and we'll discuss the current state of the evidence honestly during your consultation.
Compared with the alternatives

How GAE stacks up against the other paths forward.

For a typical patient with persistent knee osteoarthritis pain, here's how the most common options compare. Your specific situation may shift these numbers — we'll go through them in detail at your consultation.

Comparison
GAE
Total Knee Replacement
Type of intervention
Minimally invasive, image-guided
Major orthopedic surgery
Anesthesia
Local + light sedation
General or spinal
Hospital stay
None — outpatient
1–3 nights typical
Time to walking unaided
Same day
4–6 weeks
Time to full recovery
2–3 days
3–6 months
Reverses cartilage damage?
No — addresses inflammation only
N/A — replaces the joint surface
Best for
Mild–moderate OA, not yet surgical
End-stage OA, surgical candidates

What I tell every patient: GAE isn't a miracle, and it isn't right for everyone. But for the patient who has been told to wait — who's too young or too healthy for a replacement, who's tired of injections that don't last — there's now a real option in between. That's the conversation worth having.

Dr. Sabeen Dhand, MD  ·  Board-Certified Interventional Radiologist
Frequently asked

What patients usually want to know.

GAE has been covered by Medicare and many commercial insurance plans, though coverage varies by carrier, plan, and demonstrated medical necessity. Some patients meet coverage criteria immediately; others may need prior authorization or appeal. Before scheduling, our office verifies your specific benefits and walks you through any out-of-pocket costs in writing — no surprises.
Some patients notice meaningful improvement within the first week. For most, the full benefit develops gradually over 4 to 8 weeks as the inflammation resolves. A small percentage of patients see slower improvement extending to 3 months. We'll discuss realistic timelines for your specific situation, and we follow up at 1 week, 1 month, and 3 months to track your progress.
Published studies show meaningful pain relief lasting at least 2 years in most responding patients, with some maintaining relief at 4+ years. The procedure can be repeated if needed — there's no limit on how often it can be done if the benefit wanes. The honest framing: it's a way to manage osteoarthritis pain over time, not a permanent cure.
Most patients describe it as similar to a colonoscopy in terms of comfort. The catheter site is fully numbed, and the IV sedation keeps you relaxed and comfortable. You may feel mild warmth in the knee when the embolization material is delivered — this is brief and not painful. Many patients chat with the team throughout. There's no incision, no stitches.
Most of our patients have. In fact, the patient pattern that often points most clearly toward GAE is someone whose injections used to provide months of relief but no longer last — that change reflects how the abnormal vessels and inflammation evolve in the joint over time, which is exactly what GAE addresses. Prior partial replacement isn't an automatic disqualifier either; it depends on what's driving your current pain.
Possibly. GAE doesn't reverse cartilage damage, so if you have progressive osteoarthritis, joint replacement may eventually become the right choice. What GAE does is buy time — sometimes a few years, sometimes much longer — and meaningfully improve quality of life in the interim. For some patients, it provides enough relief that surgery becomes unnecessary. We'll have a candid conversation about what's realistic for your stage of disease.
GAE has a low complication rate in published series — under 2% for significant complications. The most common minor effects are temporary skin discoloration over the knee (resolves on its own) and mild groin or wrist soreness at the catheter site. Rare but serious risks include unintended embolization of nearby tissue, infection, and contrast reactions. Every risk is reviewed in detail in writing before consent, and we don't proceed unless you're fully informed and comfortable.
In our outpatient interventional suite in Van Nuys. The room is equipped with the same advanced imaging used at major academic medical centers. You'll be home the same afternoon, in your own bed by evening.

Find out if GAE could be right for you.

Our two-minute assessment helps you understand — in plain language — whether you're likely to be a candidate. If you are, we'll invite you in for a consultation with Dr. Dhand.

Take the 2-minute assessment

No commitment · No insurance required to assess · No personal info needed to start