Minimally Invasive Procedure (GAE) Offers Relief for Knee Osteoarthritis Pain

Recent research published in Radiology suggests that genicular artery embolization (GAE) using rapidly resorbable gelatin-based microspheres delivers significant relief from knee pain due to osteoarthritis. The study was carried out by Dr. Florian Nima Fleckenstein and his colleagues at Charité - Universitätsmedizin Berlin.

The World Health Organization reports that knee osteoarthritis affects over 365 million people worldwide, leading to significant disability. Current treatment options pose a challenge as conservative therapies often fall short, and joint replacement may not be viable for all patients due to various constraints.

GAE stands out as a minimally invasive technique that targets and reduces abnormal blood vessels around the knee. This approach aims to decrease the inflammation and pain associated with the condition. The study utilized gelatin-based microspheres that dissolve quickly, providing a temporary solution that integrates the benefits of both permanent and temporary embolic agents.

"GAE is an innovative treatment regimen targeting the pathological neurovascular environment, potentially slowing disease progression," Dr. Fleckenstein stated. The study involved 194 participants, comprising 114 women and 80 men, who had not responded to at least 3 months of conventional pain-relief methods. The procedures were conducted between July and November 2024.

The research demonstrated no moderate or severe adverse effects, with only minor reactions occurring in 6.7% of participants. Techniques such as digital subtraction angiography provided a navigational aid during the procedures, ensuring accuracy and efficacy.

According to Dr. Fleckenstein, the outcomes reinforced the procedure's potential. "We observed a significant reduction in pain and enhancement in functionality, including daily activities and sports," he commented. Pain scores on the Numeric Rating Scale decreased from an average of 7 at the beginning to 3 by the six-month and 12-month marks.

The study employed the Knee Injury and Osteoarthritis Outcome Score (KOOS) to measure improvements across various domains. Results showed notable enhancements from baseline to the 12-month follow-up: daily activity scores rose from 53 to 71.5, sports and recreation from 15 to 36, symptoms from 51 to 68, and quality of life from 19 to 40.

"With nearly 200 patients, this study is the most comprehensive examination of GAE using these microspheres to date," Dr. Fleckenstein remarked. "The findings offer reassuring evidence of safety and effectiveness, indicating this procedure as a promising alternative for those unresponsive to traditional therapies."