Transcatheter Arterial Embolization for Knee Pain Management

Transcatheter arterial embolization (TAE) is an emerging minimally invasive intervention for patients with symptomatic knee osteoarthritis who have inadequate response to conservative therapy. By selectively occluding aberrant neovessels arising from genicular arterial branches, TAE aims to reduce synovial inflammation and nociceptive stimulation, thereby alleviating pain and potentially slowing structural progression. The procedure involves percutaneous femoral or radial arterial access under local anaesthesia, superselective catheterisation of genicular arteries, and delivery of calibrated embolic agents such as microspheres. Clinical indications typically encompass mild to moderate osteoarthritis with persistent pain despite pharmacological and rehabilitative measures, or cases where comorbidities preclude surgical options. Early and long-term follow-up studies demonstrate significant improvements in patient-reported pain scores, joint function, and magnetic resonance imaging markers of synovitis, with a low incidence of adverse events. This technique has gained global interest as a potential adjunct or alternative to established knee osteoarthritis interventions, warranting further randomised trials to define optimal patient selection and standardise procedural protocols.

Research from Nature Portfolio

Recent studies have highlighted the role of tissue-specific endothelial changes in osteoarthritis. In particular, research demonstrates that subchondral bone endothelial cells exhibit a pro-inflammatory signature and enhanced angiogenic sprouting under osteoarthritic conditions compared with muscle endothelium. Ageing and systemic inflammation were shown to differentially affect vascular behaviour in bone and muscle, suggesting that targeted modulation of bone neovascularisation may address synovial and subchondral pathology. These findings provide a mechanistic basis for embolisation approaches by confirming that pathological angiogenesis contributes to pain and structural degeneration in knee osteoarthritis.

Transcatheter Arterial Embolization for Knee Pain Management publication trend

The graph below shows the total number of articles in transcatheter arterial embolization for knee pain management across all publications each year (not limited to Nature Index journals).

Technical terms

Transcatheter arterial embolization: A minimally invasive procedure that uses a catheter to deliver embolic agents to selectively occlude blood vessels.

Genicular arteries: The network of arterial branches supplying the knee joint, commonly targeted during embolisation to reduce pathological neovascularisation.

Neovascularisation: The formation of new blood vessels, often associated with chronic inflammation and pain in osteoarthritis.

Synovitis: Inflammation of the synovial membrane, contributing to joint pain and swelling in knee osteoarthritis.

Microspheres: Calibrated spherical embolic particles used to occlude small arterioles during embolisation procedures.

References

1. Differential angiogenesis of bone and muscle endothelium in aging and inflammatory processes. Communications Biology (2023).
2. Genicular artEry embolizatioN in patiEnts with oSteoarthrItiS of the Knee (GENESIS) Using Permanent Microspheres: Interim Analysis. CardioVascular and Interventional Radiology (2021).
3. Classification of Genicular Artery Anatomic Variants Using Intraoperative Cone-Beam Computed Tomography. CardioVascular and Interventional Radiology (2023).
4. Genicular Artery embolisation in Patients with Osteoarthritis of the Knee (GENESIS) Using Permanent Microspheres: Long-Term Results. CardioVascular and Interventional Radiology (2024).