Genicular artery embolization
Genicular artery embolization (GAE or geniculate artery embolization) is a minimally invasive image-guided procedure performed by interventional radiologists to relieve chronic knee pain caused by osteoarthritis or post-operative hemarthrosis.[1]
Technique and indications
[edit]The technique involves embolizing (blocking) small arteries around the knee, specifically the genicular arteries, to reduce inflammation and development of new blood vessels that may contribute to pain.[2]
GAE is indicated for people having:
- Moderate to severe knee osteoarthritis (Kellgren–Lawrence grade 2-4)
- Persistent knee pain not responsive to conservative treatments (e.g., physiotherapy, NSAIDs, corticosteroid injections)
- Recurrent hemarthrosis after total knee arthroplasty
- People who are not suitable candidates for knee replacement surgery or prefer non-surgical management
Mechanism and procedure
[edit]During the procedure, a catheter is inserted through a small puncture, typically in the femoral or radial artery, and advanced under fluoroscopic guidance to the arteries supplying the knee joint.[3][4] Embolic agents (microspheres) are injected into the genicular arteries to block blood flow in small vessels, reducing reduce inflammation, synovial hyperplasia, and pain associated with chronic inflammation.[3][4]
GAE is usually conducted as an outpatient procedure under local anesthesia, with duration between 1–2 hours.[3] Patients can generally walk the same day and return to normal activities within 1–2 days.[3] Post-procedural care involves monitoring for minor side effects, such as skin discoloration or transient pain.[3]
Research and risks
[edit]Clinical studies have demonstrated that GAE results in significant reductions in pain scores (e.g., visual analogue scale or WOMAC). It can also lead to improved functional ability and quality of life, with high patient satisfaction.[5] Early intervention with GAE improves clinical outcomes.[6] By 12 months post-procedure, 78% and 92% of patients meet the clinical threshold for significant pain reduction by visual analog scale and total WOMAC score, respectively.[7] Significant pain reductions may be sustained in patients for at least two years following a single GAE procedure.[8]
Although generally safe, the procedure carries risks, including skin discoloration or bruising, temporary numbness or tingling, and rare instances of non-target embolization (where embolic material is inadvertently deposited in unintended vessels or organs).[9] Overall risks are very low and are comparable to other minimally invasive angiographic procedures such as hemorrhoidal artery embolization (HAE, or hemorrhoid embolization).[10]
See also
[edit]References
[edit]- ↑ Cusumano, Lucas R.; Padia, Siddharth A. (2026-04-17). "Navigating the Treatment Gap in Knee Osteoarthritis: A Comparative Review of Intra-Articular Injections, Genicular Nerve Ablation, and Genicular Artery Embolization". Seminars in Interventional Radiology. doi:10.1055/a-2845-7049. ISSN 0739-9529.
- ↑ Sterbis, Emily; Casadaban, Leigh (March 2023). "Genicular Artery Embolization Technique". Techniques in Vascular and Interventional Radiology. 26 (1) 100878. doi:10.1016/j.tvir.2022.100878. PMID 36889843.
- 1 2 3 4 5 "Genicular artery embolisation for pain from knee osteoarthritis". UK National Institute for Health and Care Excellence. 27 October 2021. Retrieved 23 April 2026.
- 1 2 Taslakian, B; Miller, LE; Mabud, TS; et al. (June 2023). "Genicular artery embolization for treatment of knee osteoarthritis pain: Systematic review and meta-analysis". Osteoarthritis and Cartilage Open. 5 (2) 100342. doi:10.1016/j.ocarto.2023.100342. PMC 9971280. PMID 36865988.
- ↑ Padia, Siddharth A.; Genshaft, Scott; Blumstein, Gideon; Plotnik, Adam; Kim, Grace Hyun J.; Gilbert, Stephanie J.; Lauko, Kara; Stavrakis, Alexandra I. (October 2021). "Genicular Artery Embolization for the Treatment of Symptomatic Knee Osteoarthritis". JBJS Open Access. 6 (4) e21.00085. doi:10.2106/JBJS.OA.21.00085. PMC 8542160. PMID 34703964.
- ↑ Callese, Tyler; Cusumano, Lucas R.; Sparks, Hiro; Masterson, Kara; Genshaft, Scott; Stewart, Jessica K.; Padia, Siddharth A. (December 2025). "Early intervention in knee osteoarthritis with genicular artery embolization is associated with improved clinical outcomes". European Radiology. 35 (12): 7617–7626. doi:10.1007/s00330-025-11702-1. ISSN 1432-1084. PMC 12634750. PMID 40442362.
- ↑ Taslakian, Bedros; Miller, Larry E.; Mabud, Tarub S.; Macaulay, William; Samuels, Jonathan; Attur, Mukundan; Alaia, Erin F.; Kijowski, Richard; Hickey, Ryan; Sista, Akhilesh K. (June 2023). "Genicular artery embolization for treatment of knee osteoarthritis pain: Systematic review and meta-analysis". Osteoarthritis and Cartilage Open. 5 (2) 100342. doi:10.1016/j.ocarto.2023.100342. ISSN 2665-9131. PMC 9971280. PMID 36865988.
- ↑ Cusumano, Lucas R.; Sparks, Hiro D.; Masterson, Kara E.; Genshaft, Scott J.; Plotnik, Adam N.; Padia, Siddharth A. (December 2024). "Genicular Artery Embolization for Treatment of Symptomatic Knee Osteoarthritis: 2-Year Outcomes from a Prospective IDE Trial". Journal of Vascular and Interventional Radiology: JVIR. 35 (12): 1768–1775. doi:10.1016/j.jvir.2024.08.028. ISSN 1535-7732. PMID 39322180.
- ↑ O'Grady, Aiden M.; Little, Mark W. (March 2023). "Genicular Artery Embolization Data Review". Techniques in Vascular and Interventional Radiology. 26 (1) 100880. doi:10.1016/j.tvir.2022.100880. PMID 36889838.
- ↑ "Hemorrhoidal Artery Embolization (HAE) - Interventional Radiology | UCLA Health". www.uclahealth.org. Retrieved 2026-07-11.