Key Takeaways

• There is no single new treatment that has replaced established knee arthritis care, but Genicular Artery Embolization (GAE) is one newer minimally invasive option receiving increased attention.
• GAE targets abnormal blood vessels associated with inflammation in an arthritic knee rather than replacing the joint.
• The procedure does not rebuild cartilage or cure osteoarthritis.
• GAE may be considered for selected patients whose knee pain continues despite conservative treatments and who are not ready for or want to delay knee replacement.
• Research is encouraging, but evidence is still evolving, particularly when GAE is compared with sham procedures in randomized trials.

If you've been searching for a new treatment for arthritis in the knee, you may have come across Genicular Artery Embolization, or GAE.

GAE is a minimally invasive, image-guided procedure being studied and used for pain associated with knee osteoarthritis. Unlike knee replacement, it does not remove damaged parts of the joint. Instead, it targets abnormal blood vessels associated with inflammation inside the knee.

At Ally Vascular & Pain Centers, minimally invasive procedures such as GAE are part of a broader approach to helping appropriately selected patients explore options beyond conventional pain management and major surgery.

Is There Really a New Treatment for Knee Arthritis?

There isn't one completely new treatment that has replaced physical therapy, medications, injections, exercise, or knee replacement.

Instead, treatment options continue to expand.

One of the newer approaches is GAE, an outpatient procedure performed by an interventional radiologist.

Its emergence reflects a growing understanding that knee osteoarthritis is more than simply cartilage "wear and tear."

Cartilage breakdown is an important part of osteoarthritis, but inflammation of the joint lining, called synovitis, can also contribute to pain. This inflamed tissue may develop increased numbers of small blood vessels, a process known as abnormal or pathologic neovascularization.

GAE is designed to target some of this abnormal vascularity.

What Is Genicular Artery Embolization?

The genicular arteries are small arteries around the knee.

During GAE, an interventional radiologist uses imaging to guide a small catheter through the blood vessels toward selected arteries supplying areas of abnormal vascularity around the arthritic knee.

Microscopic embolic material is then delivered into carefully selected vessels to reduce this abnormal blood flow.

The goal is not to eliminate normal blood supply to the knee. The physician targets abnormal vascularity associated with inflamed tissue while working to preserve normal circulation.

This makes GAE fundamentally different from treatments that act directly inside the joint or replace its damaged surfaces.

Why Would Reducing Abnormal Blood Flow Help Knee Pain?

Osteoarthritis can involve persistent inflammation of the synovium, the tissue lining the inside of the joint.

As inflammation persists, abnormal new blood vessels can develop within the affected tissue. These vessels may be accompanied by sensory nerve growth involved in pain signaling.

GAE is based on the idea that selectively reducing this abnormal vascularity may reduce inflammatory and neurovascular processes contributing to osteoarthritis-related pain.

A 2026 SIR position statement describes GAE as a joint-preserving option for appropriately selected patients with symptomatic knee osteoarthritis who have not responded adequately to conservative treatment and are not candidates for or wish to delay knee replacement.

Is GAE a Cure for Knee Osteoarthritis?

No.

This is an important distinction.

GAE does not:

• Regrow lost cartilage
• Reverse existing structural joint damage
• Rebuild the knee joint
• Cure osteoarthritis

The procedure is intended to address processes associated with pain and inflammation rather than reverse the underlying structural changes of osteoarthritis.

A person's X-rays may therefore continue to show arthritis even if symptoms improve following treatment.

How Strong Is the Evidence for GAE?

Research into GAE has grown substantially during the past several years, but the evidence requires some context.

Many observational studies and single-arm clinical studies have reported meaningful improvements in pain and physical function after GAE.

A large 2026 systematic review involving more than 2,000 patients reported improvements in pain and functional scores across predominantly uncontrolled studies. However, the authors rated the overall certainty of the evidence as low to very low.

More recent analyses have also highlighted an important limitation.

A separate 2026 meta-analysis found substantial improvements when patients were compared with their own symptoms before GAE. However, when the highest-quality sham-controlled randomized trials were pooled, they did not demonstrate a statistically significant advantage for GAE over the sham procedure.

That does not mean GAE has been shown to be ineffective. It means researchers still need larger, well-designed randomized trials to determine how much improvement is specifically attributable to embolization and which patients are most likely to benefit.

This evolving evidence is why GAE should be discussed as an option for carefully selected patients rather than as a guaranteed solution for knee arthritis.

How Does GAE Fit With Traditional Knee Arthritis Treatment?

GAE generally does not replace first-line osteoarthritis care.

Treatment typically begins with approaches such as:

• Exercise and strengthening
• Physical therapy
• Weight management when appropriate
• Activity modification
• Topical or oral medications when medically appropriate
• Certain knee injections

Current AAOS guidance continues to support evidence-based non-surgical treatments such as exercise as important components of knee osteoarthritis management.

When symptoms persist despite conservative care, patients and their physicians may begin discussing additional options.

For some patients, that can include GAE treatment.

Others may ultimately benefit more from orthopedic surgery, including knee replacement.

GAE therefore occupies a potential space between conservative care and major joint surgery rather than replacing either one.

How Is GAE Different From Knee Injections?

The procedures target osteoarthritis in different ways.

Knee injections deliver medication or another substance directly into the joint.

GAE does not involve injecting medication into the joint itself.

Instead, an interventional radiologist approaches the knee through the arterial system and targets selected blood vessels associated with inflamed tissue.

This vascular approach is one of the features that makes GAE different from more established knee arthritis treatments.

How Is GAE Different From Knee Replacement?

Knee replacement and GAE have very different goals.

During total knee replacement, damaged joint surfaces are surgically removed and replaced with artificial components.

GAE preserves the natural joint. It does not remove bone, replace cartilage, or insert an artificial joint.

Because of those differences, the procedures are not interchangeable.

A patient with advanced structural damage and severe disability may ultimately be best served by knee replacement. Another patient with persistent osteoarthritis pain who is not ready for joint surgery may be interested in exploring a less invasive option.

The appropriate choice depends on the individual rather than simply which procedure is newer.

Who May Be Considered for GAE?

There is no single profile that determines candidacy.

An evaluation generally considers factors such as:

• A confirmed diagnosis of knee osteoarthritis
• Persistent pain affecting daily activities
• Response to physical therapy, medications, or injections
• Imaging findings
• Location and characteristics of the pain
• Overall health
• Surgical candidacy
• Individual goals and preferences

GAE is not appropriate for every person with an arthritic knee.

Ally's interventional radiologists review symptoms, previous treatments, imaging, and other clinical factors before determining whether an image-guided procedure may be reasonable to consider.

What Happens During GAE?

GAE is typically performed as an outpatient procedure.

Through a small vascular access point, the physician guides a thin catheter toward the arteries around the knee using real-time imaging.

Once abnormal vascularity has been identified, embolic material is delivered to selected vessels.

The catheter is then removed and the access site is closed.

Because the treatment is performed from inside the blood vessels, there is no surgical replacement of the knee joint.

Specific procedural techniques, embolic materials, recovery instructions, and follow-up plans can vary, which is another reason the procedure should be individualized.

What Are the Risks of GAE?

As with any medical procedure, GAE has potential risks.

Reported adverse events have most commonly been minor and temporary, including bruising or hematoma at the vascular access site and temporary skin discoloration around the treated area.

Other complications are possible.

Recent research has also emphasized that different embolic materials may have different safety considerations. Because the evidence and techniques continue to evolve, patients should discuss the proposed embolic material, potential complications, expected benefits, and available alternatives with their treating physician.

Is GAE Better Than Other Knee Arthritis Treatments?

There is no single knee arthritis treatment that is best for every patient.

Exercise and other conservative strategies remain important. Injections can help certain patients. Knee replacement can provide substantial benefit for appropriately selected people with advanced disease.

GAE adds another potential option to that treatment spectrum.

Its main appeal is that it is minimally invasive and preserves the existing joint, but being newer does not automatically make it better than established treatments.

The goal should be to choose the treatment that makes the most sense for the patient's symptoms, anatomy, previous treatment, overall health, and goals.

Is This New Knee Arthritis Treatment Right for You?

When people ask about the newest treatment for knee arthritis, they are often really asking a different question:

Is there something I can try before knee replacement?

For some patients, Genicular Artery Embolization may be one option worth discussing.

GAE targets abnormal vascularity associated with inflammation rather than replacing the knee. It is minimally invasive, joint-preserving, and supported by a growing body of research.

At the same time, it does not regenerate cartilage or cure osteoarthritis, and high-quality evidence is still developing.

That makes individualized evaluation particularly important.

If knee osteoarthritis continues to interfere with walking, exercise, work, or everyday activities despite conservative care, you can schedule a consultation to discuss whether an image-guided treatment may fit into your care plan.

Patients can also find the San Antonio practice through the Ally Vascular & Pain Centers Google Business Profile.