GENICULAR ARTERY EMBOLIZATION (GAE)

Living with chronic knee pain can feel like a constant uphill battle — especially when traditional therapies stop working and you’re trying to avoid surgery. At Prospero Vascular, we offer a breakthrough, minimally invasive option for patients with knee osteoarthritis: Genicular Artery Embolization (GAE).

GAE is a safe, outpatient procedure designed to reduce knee pain by blocking abnormal blood flow that contributes to inflammation in arthritic joints. If you’ve been told that knee replacement is your only option, GAE may offer real, lasting relief — without the downtime or risks of major surgery.

What Is Genicular Artery Embolization?

Genicular Artery Embolization is a non-surgical treatment that targets the tiny arteries supplying the knee joint, known as the genicular arteries. These vessels can become overactive and inflamed in patients with knee osteoarthritis, leading to increased joint pain and stiffness.

Using image-guided technology, a vascular specialist inserts a catheter through a small puncture in the leg and injects microscopic beads into these arteries. The beads block excess blood flow, reducing inflammation, decreasing pain, and improving mobility.

Unlike knee surgery, GAE requires no incisions, no general anesthesia, and no hospital stay. Most patients walk out the same day and feel relief in the following weeks.

Who Is a Candidate for GAE?

This procedure is often life-changing for people who feel stuck between ongoing pain and invasive surgery. It’s also a great option for patients who’ve already had one knee replaced and hope to avoid going through it again.

GAE is not appropriate for patients with active infection, severe peripheral arterial disease, or advanced bone-on-bone degeneration where mechanical alignment has collapsed. However, many with moderate-to-severe OA still qualify — and imaging can confirm candidacy.

The Link Between Osteoarthritis and Inflammation

Osteoarthritis (OA) is typically thought of as “wear and tear,” but inflammation plays a bigger role than most people realize. In fact, the joint damage in OA often causes the surrounding tissue to become inflamed, which attracts new blood vessels that feed the inflamed areas.

This abnormal vascular growth contributes to a pain–inflammation–pain cycle that GAE interrupts. By blocking these problematic arteries, we reduce the flow of inflammatory cells to the joint — leading to real pain relief, even in the absence of structural change.

This also explains why traditional surgery isn’t always necessary to feel better: the joint may look the same on X-ray, but the source of pain can be turned off by cutting off its blood supply.

How Is GAE Performed?

Genicular Artery Embolization is performed at Prospero Vascular as a same-day outpatient procedure. Most patients are in and out within 2 to 3 hours, and the procedure itself typically takes 60 to 90 minutes.

Step 1: Preparation

• You’ll meet with our interventional radiologist or vascular specialist, who will review imaging and your medical history.
  
• Light sedation and local anesthesia are used to keep you relaxed and comfortable.
  
• No general anesthesia is needed, and you’ll remain awake during the procedure.
  

Step 2: Arterial Access

• A tiny puncture (less than 2mm) is made in the groin or upper thigh to access the femoral artery.
  
• A thin catheter is threaded into the genicular arteries that feed the inflamed areas of your knee joint.
  

Step 3: Embolization

• A contrast dye is used to visualize blood flow to the knee under fluoroscopy (real-time X-ray).
  
• Once abnormal blood vessels are identified, microspheres (tiny particles) are injected to selectively block the problematic arteries.
  

Step 4: Closure and Recovery

• The catheter is removed, and the access site is closed with gentle pressure or a closure device.
  
• You’ll recover in our observation area for about 1 hour, then go home the same day.
  
• Most patients resume light activities within 24–48 hours.
  

Benefits of GAE

✅ Minimally Invasive – No scalpels, no incisions, and no general anesthesia.
✅ Same-Day Procedure – In and out in a few hours.
✅ Fast Recovery – Return to normal activities within days.
✅ Significant Pain Relief – Most patients experience reduced pain and stiffness.
✅ Avoid or Delay Surgery – Preserve your knee joint longer.
✅ Repeatable and Adjustable – Can be redone or combined with other treatments.
✅ Safe and Effective – Low complication rate with strong clinical outcomes.

Clinical Results and Effectiveness

Multiple studies have confirmed the safety and effectiveness of Genicular Artery Embolization in relieving knee pain due to OA.

• 75–85% of patients report significant improvement in pain and function
  
• Improvements often last 12 months or longer, with many reporting relief at the 2-year mark
  
• GAE has been shown to reduce reliance on NSAIDs and opioids
  
• It can delay or eliminate the need for total knee replacement in many cases
  

Patients begin to notice improvements in 2–4 weeks, with maximum relief typically achieved by 6–12 weeks post-procedure.

What Does GAE Feel Like?

Most patients are surprised by how comfortable the procedure is. During the embolization, you may feel a mild warming or pressure sensation in the knee, but no pain. Afterward, there may be mild soreness or bruising at the access site, which typically resolves in a day or two.

Some patients experience a temporary increase in knee pain for a few days as the body adjusts to the embolization, but this is normal and short-lived.

Recovery and Aftercare

Because GAE is performed without incisions or general anesthesia, recovery is quick and low-maintenance.

• Day of procedure: Rest and limit activity. Someone will need to drive you home.
  
• 1–2 days: Resume most normal activities, including walking, work, and light exercise.
  
• 1 week: You may begin to notice early signs of pain relief.
  
• 6–12 weeks: Full benefits are typically realized by this point.
  

You’ll have follow-up appointments with our team to track your progress. Most patients do not need physical therapy, but it can help improve mobility and enhance long-term outcomes.

Risks and Safety

Like all procedures, GAE carries some risks, though they are rare. Potential complications include:

• Bruising or hematoma at the access site
  
• Knee discomfort during the first few days
  
• Non-target embolization (unintended blockage of a nearby vessel, rare with experienced operators)
  
• Allergic reaction to contrast dye
  
• Infection (extremely rare)
  

At Prospero Vascular, we use advanced imaging and meticulous technique to minimize these risks. Our interventional team has extensive experience in embolization techniques and outpatient vascular care.

Who Performs Genicular Artery Embolization?

At Prospero Vascular, GAE is performed by a board-certified interventional radiologist or vascular specialist with advanced training in embolization techniques. Our outpatient facility is equipped with state-of-the-art imaging, including high-resolution fluoroscopy and cone-beam CT for precise targeting.

We collaborate with your orthopedic surgeon, primary care provider, or pain specialist to ensure continuity of care and the best long-term outcomes.

Cost and Insurance Coverage

While GAE is a newer procedure, many insurers — including Medicare and private plans — are beginning to recognize its medical value and offer coverage. Our team will help verify your benefits and obtain any necessary authorizations before treatment.

If you’re paying out of pocket, we offer transparent pricing and payment plans, because relief from chronic knee pain shouldn’t be out of reach.