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Endovascular / Catheter-Based

Medically Reviewed By:

2026-07-26

Genicular Artery Embolization

Genicular artery embolization (GAE) is a catheter-based treatment for chronic knee pain from osteoarthritis. Tiny microspheres delivered to the genicular arteries reduce blood flow to the inflamed joint lining, easing pain without surgery, implants, or a hospital stay. It suits patients with mild to moderate arthritis who are not ready for knee replacement. Offered in Sarasota and Bradenton.

Genicular Artery Embolization in Sarasota & Bradenton

Knee Pain from Arthritis, Treated Without Surgery. A New Option for Patients Who Aren’t Ready for Replacement.

Genicular artery embolization โ€” known as GAE โ€” is a minimally invasive catheter-based procedure that reduces chronic knee pain caused by osteoarthritis. By delivering tiny microspheres to the arteries that supply the inflamed synovial lining of the knee, GAE reduces blood flow to the area of inflammation and relieves pain โ€” without surgery, without implants, and without a hospital stay.

GAE is an emerging option for patients with mild to moderate knee osteoarthritis who have knee pain that has not responded adequately to conservative measures and who are not ready or not appropriate candidates for knee replacement surgery. Vascular Wellness Institute offers GAE as part of our commitment to expanding non-surgical treatment options for patients in Sarasota and Bradenton.

How GAE Works

In osteoarthritis, the inflamed synovium โ€” the tissue lining the knee joint โ€” develops an abnormally dense network of tiny blood vessels that contribute to pain and inflammation. GAE targets these vessels. A catheter is inserted through a small puncture in the wrist or groin and guided under X-ray to the genicular arteries supplying the knee. Tiny microspheres โ€” smaller than a grain of sand โ€” are delivered to reduce blood flow in the inflamed synovium. This decreases the inflammatory signals driving pain without affecting the bone, cartilage, or joint structure.

What the Evidence Shows

GAE has been studied in multiple prospective case series, sham-controlled trials, and multicenter studies. Early evidence โ€” including prospective work by Okuno and colleagues and subsequent research โ€” showed meaningful reductions in pain scores at six to twelve months. A 2024 randomized sham-controlled trial and a 2026 Society of Interventional Radiology position statement both support GAE as a reasonable option for selected patients, while noting that long-term durability data and optimal patient selection criteria are still evolving. The procedure does not treat the underlying structural joint disease but can provide meaningful functional pain relief. It is important to understand that the evidence base for GAE is still developing, and this should be part of your informed discussion with your physician before proceeding.

GAE uses embolic microspheres that are FDA-approved or FDA-cleared devices; however, their use specifically for knee osteoarthritis pain relief is an off-label application in the United States. This means the procedure is performed using approved devices for a purpose described in peer-reviewed literature but not yet carrying a dedicated FDA indication for this use. Your physician will discuss the off-label nature of this application, the current state of the evidence, and what it means for your care during your consultation.

Who Is a Candidate?

  • Adults with confirmed knee osteoarthritis on X-ray or MRI
  • Chronic knee pain (typically three months or longer)
  • Inadequate relief from conservative treatments (physical therapy, injections, NSAIDs)
  • Not yet ready for or not appropriate for total knee replacement
  • No contraindications to contrast dye or catheter-based procedures

Anesthesia Type

Conscious Sedation, Local

Typical Duration

1โ€“2 hrs

Performed At

Outpatient Surgery Center, Hospital

Recovery Time

Same day discharge; knee soreness for 1โ€“2 weeks; pain improvement develops over 2โ€“4 weeks

Frequently Asked Questions

  • How long does GAE take and what is recovery like? +

    The procedure takes approximately one to two hours and is performed under local anesthesia with sedation. Most patients go home the same day. Post-procedure knee soreness is common for one to two weeks. Many patients begin noticing pain improvement within two to four weeks as the inflammatory response decreases.

  • How long does relief from GAE last? +

    Published studies report meaningful pain relief maintained at 12 months in the majority of patients. Long-term durability beyond two years is less well-established given the relative novelty of the procedure. GAE does not reverse the underlying arthritis, and pain may return as the disease progresses. Repeat treatment or eventual knee replacement remains an option.

  • Does GAE damage the knee joint? +

    Published data show no evidence of joint damage or accelerated disease progression from GAE. The microspheres are delivered selectively to the synovial arteries, not the arteries supplying bone or cartilage. Imaging follow-up in clinical trials has not shown adverse effects on joint structure.

  • Is GAE covered by insurance? +

    As of 2026, GAE for knee osteoarthritis is not routinely covered by Medicare or most commercial insurers and is typically offered as a self-pay procedure. Coverage is evolving as the clinical evidence base grows and payer policies are updated. Our team will provide transparent self-pay pricing and discuss your options. We recommend confirming your specific planโ€™s position before scheduling.

  • Can I still have knee replacement later if GAE doesnโ€™t work? +

    Yes. GAE does not preclude future knee replacement surgery. If GAE provides insufficient relief or if your arthritis progresses, knee replacement remains a fully viable next step. Many patients use GAE as a bridge to delay replacement until the timing is better for them.