GAE vs. Total Knee Replacement

Written by Ilya Livshits, MD

If your knee osteoarthritis pain is causing you to struggle to climb stairs or avoid long walks, you should know the pain isn’t going away on its own. What you may not know is that total knee replacement is no longer the only lasting treatment option. A minimally invasive procedure called Genicular Artery Embolization (GAE) has emerged as a proven alternative to knee replacement for many patients with knee osteoarthritis. Let’s compare the differences between GAE vs. total knee replacement.

GAE vs. Total Knee Replacement overview

• GAE is a same-day outpatient, non-surgical procedure that reduces knee pain caused by osteoarthritis.
• Total knee replacement (TKR) is a good option for advanced, bone-on-bone arthritis.
• GAE does not rule out the need for knee replacement, but it can be a reasonable first step for patients who aren’t ready for surgery.
• The right choice depends on the severity of your arthritis, your overall health, and how you weigh recovery time against long-term durability.

What is knee osteoarthritis, and why does it hurt so much?

Knee osteoarthritis develops when the cartilage cushioning your knee joint wears down over time, until bone eventually grinds against bone. In osteoarthritic knees, the synovium—the tissue lining the joint—often shows increased blood vessel growth and ongoing inflammation, which can be a major cause of the pain patients experience.¹

Knee osteoarthritis is also incredibly common. it’s one of the leading causes of chronic pain and disability in adults. For most, it develops gradually: a twinge becomes a limp, a limp becomes an avoided flight of stairs, and years can pass before anyone stops to ask if there’s a better way to manage it.

Why so many patients put off knee replacement

Knee replacement has a good long-term track record, but it’s still major surgery, and patients delay it for a variety of reasons including:

• Concerns about general anesthesia
• The weeks of physical therapy and months of recovery it can take to feel fully back to normal
• A heart, lung, or kidney condition that makes a patient a less-than-ideal surgical candidate
• Simply not being ready to commit to a procedure that permanently alters the joint

This hesitation is really normal. GAE is a procedure that serves the middle ground- for those that don’t want unending medication, but also don’t want invasive surgery.

How GAE works

GAE is performed by an interventional radiologist, a physician trained in image-guided, catheter-based procedures. Through a small puncture point, usually in the wrist or groin, a thin catheter is guided under imaging to the genicular arteries, the small vessels that supply blood to the knee joint. Tiny particles called microspheres are then released into the arteries supplying the inflamed tissue, reducing the abnormal blood flow to that area and calming the inflammation that causes the pain.²

The procedure usually takes about an hour and patients go home the same day.

GAE vs. Total Knee Replacement: Side-by-side comparison

	GAE	Total Knee Replacement
Invasiveness	Catheter-based, no incision	Open surgery
Anesthesia	Local numbing to catheter site	General anesthesia
Setting	Outpatient	Inpatient, hospital stay
Typical recovery	Days	6 to 12 weeks or longer
Best suited for	Mild-to-moderate OA, high surgical risk, or those wanting to delay surgery	Moderate-to-severe OA with significant joint damage

Making the right choice for your knee

Neither option is universally “better.” They’re built for different stages of the same condition. GAE offers a lower-risk, faster-recovery path for patients who aren’t ready for surgery or aren’t good candidates for one, whereas knee replacement remains a proven long-term solution for severe, advanced arthritis.

The best way to know which path fits your knee, your health history, and your goals is to talk with a specialist who can walk you through your imaging and options directly.

Schedule a GAE consultation with our interventional radiologists to learn more about GAE and find out whether you’re a candidate.

Frequently asked questions

Is GAE painful?
Some patients report mild discomfort at the catheter access site, but there is no significant pain.

Can I still get a knee replacement later if GAE doesn’t work?
Yes. GAE does not alter the joint itself, so it doesn’t limit your future surgical options.

Am I a candidate for GAE?
Good candidates typically have mild to moderate knee osteoarthritis that hasn’t responded well to physical therapy, medication, or injections, or aren’t ideal candidates for surgery due to age or other health conditions. Schedule a consult with our knee pain specialists to determine your candidacy.

 

References

1. Genicular artery embolization for treatment of knee osteoarthritis pain: Systematic review and meta-analysis. PubMed. https://pubmed.ncbi.nlm.nih.gov/36865988/
2. Sajan A, Ahmed O, Padia SA, Taslakian B, Golzarian J, Al-Qawasmi F, Krishnasamy V, Epelboym Y, Ghodadra AG, Block JA. Pathophysiology of Knee Osteoarthritis and Mechanisms of Genicular Artery Embolization for Interventional Radiologists. J Vasc Interv Radiol. 2026;37(4):107984.