A minimally invasive procedure that blocks abnormal blood vessels in the knee has shown lasting pain relief in more than 60 percent of patients at the one-year mark, offering a potential alternative to knee replacement surgery for people with osteoarthritis.

The technique, called genicular artery embolization or GAE, was the subject of new research published on June 16 in the journal Radiology. The procedure works by targeting the abnormal blood vessels that grow into the inflamed lining of arthritic knee joints, known as the synovium. By injecting tiny particles that block these vessels, interventional radiologists can reduce the inflammation driving pain without making surgical incisions into the joint itself.

In the study, patients who underwent GAE reported significantly reduced pain levels compared to baseline, and the majority maintained that improvement at 12 months. Quality of life scores also improved, including measures of mobility and daily function. The procedure takes roughly an hour under local anesthesia and most patients are discharged on the same day.

Osteoarthritis of the knee affects tens of millions of people worldwide and is among the most common reasons for knee replacement surgery. Many patients are not ideal candidates for full joint replacement because of age, weight, other health conditions or a preference to delay surgery. Current non-surgical options — including pain medication, physical therapy and steroid injections — often provide only partial or temporary relief.

GAE has been performed at a limited number of specialized centers in the US, UK and Japan, but the new data published in Radiology is expected to accelerate its adoption at larger institutions. The procedure is currently used for similar indications in other joints and in uterine fibroid treatment, where its track record spans more than two decades.

Orthopedic and rheumatology specialists not involved in the study said the results were encouraging but noted that longer-term follow-up data would be needed before GAE becomes a mainstream first-line option. Several clinical trials are ongoing in the United States and Europe.

The results complement other recent advances in arthritis research. A Stanford arthritis study published earlier this month showed promising results using a different biological approach to reversing cartilage degradation in animal models. More broadly, research on strength training benefits has shown that even modest amounts of resistance exercise can reduce knee pain and slow the progression of osteoarthritis in older adults.

Patients interested in GAE should ask their physician whether they are a candidate, as the procedure is currently available at a limited number of centers. The Radiology journal has published the full peer-reviewed study with methodology and outcome data for clinicians reviewing the evidence.

For millions of people living with knee pain who have resisted or delayed surgery, GAE represents a plausible middle path — and one that the medical community is now taking seriously enough to study at scale.