Treatment comparison
Genicular artery embolization (GAE) is a fourth option that sits between repeat injections and surgery — here is how they compare on what matters to patients.
Editorially updated October 1, 2026. This educational page was prepared by SoCal Interventional using the cited primary and authoritative sources. It does not replace an individualized medical evaluation.
Quick answer: Most people with knee osteoarthritis are offered three things in order: injections, then more injections, then a replacement. Genicular artery embolization (GAE) is a fourth option that sits between the two — a non-surgical, outpatient catheter procedure for mild-to-moderate arthritis that has not settled with conservative care. It is not cartilage repair and it does not close the door on a later knee replacement.
If your cortisone injections have started to wear off faster, read what GAE can and cannot do when cortisone stops working before deciding on the next step.
| Cortisone injection | Hyaluronic acid (“gel”) injection | GAE | Total knee replacement | |
|---|---|---|---|---|
| What it does | Suppresses inflammation for weeks | Lubricates the joint | Shuts down abnormal blood flow feeding the inflamed lining | Replaces the joint surfaces |
| Typical relief | Weeks to ~3 months | Variable; often modest; several weeks to months | Begins at 2–6 weeks; in open-label series most responders hold benefit at 1–2 years | Durable in most patients (implants last 15–20+ years) |
| Setting / time | Office, minutes | Office, minutes; series of 1–5 shots | Outpatient, ~1 hour procedure, home same day | Hospital or surgical center; 1–3 day stay |
| Downtime | None to 1 day | None | 1–3 days | 6–12 weeks of rehabilitation |
| Anesthesia | None/local | None/local | Local + light sedation | General or spinal |
| Main risks | Cartilage thinning with repeated use, blood-sugar rise, infection (rare) | Flare, swelling | Puncture bruise, temporary skin discoloration (~1 in 10), rare non-target embolization | Infection, blood clots, stiffness, implant wear, revision surgery |
| Repeatable? | Limited to ~3–4 per year | Yes, per plan limits | Yes, if first response was clear | Revision only |
| Best fit | Short-term flare control | Mild OA, early disease | Mild–moderate OA (KL 1–3) with pain despite 6+ months of conservative care; wants to avoid or delay surgery | Advanced OA (KL 4), deformity, instability, or failed everything else |
| Evidence level | Strong short-term; no long-term disease benefit | Mixed; guidelines divided | Positive single-arm series; mixed sham-controlled RCTs; large RCTs under way | Strong, long-term |
Not sure which column describes your knee? Read who is a candidate for genicular artery embolization for the X-ray grade, age and prior-injection criteria used in the studies.
Choose injections when the flare is new, imaging shows early changes, and you have not yet tried 6 months of exercise and weight management.
Consider GAE when X-rays show mild-to-moderate arthritis, pain has persisted despite therapy and at least one injection, and you want to avoid or postpone surgery — or surgery is off the table for medical reasons.
Choose replacement when arthritis is bone-on-bone, the leg is bowed or unstable, or pain limits walking despite every non-surgical option. GAE does not close this door.
GAE is not cartilage repair; blinded trials show some of its benefit overlaps with placebo; and results depend on technique and on choosing patients who look like the trial populations. The studies behind each of these statements are summarized in the GAE evidence table on our genicular artery embolization page.
Yes; most trial patients had prior injections. We ask for a 4–6 week gap.
For some patients it postpones it for years; for advanced arthritis it does not replace surgery.
Coverage follows medical necessity and documented failure of conservative care; Original Medicare and most PPOs are accepted — see the GAE cost and insurance guide.
A consultation with X-ray review in Fountain Valley, Tarzana or Van Nuys answers it in one visit.
Call (310) 929-0026 or request a GAE consultation. GAE is offered at our Fountain Valley office in Orange County and in Los Angeles and Tarzana.
Medical disclaimer: This page provides general education and cannot determine individual candidacy or outcome.
Explore more: Read the complete genicular artery embolization guide and review our Medical Editorial Policy.
Medical content reviewed by Nathanael Sabbah, MD, interventional radiologist. Last reviewed: October 2026.