Chemical neurolysis of genicular nerves for chronic non-cancer knee pain: a scoping review
By
Matthew Rong Jie Tay
Nimish Mittal
Samantha Yao
Jordan Farag
October 30, 2024
Clinical Scorecard: A Scoping Review of Chemical Neurolysis for Genicular Nerves in Managing Chronic Non-Cancer Knee Pain
At a Glance
Category Detail
Condition Chronic non-cancer knee pain, including knee osteoarthritis Key Mechanisms Chemical neurolysis of genicular nerves using neurolytic agents (phenol or alcohol) to ablate nerves supplying the knee joint Target Population Adults with chronic non-cancer knee pain, including those unsuitable for or preferring nonsurgical options Care Setting Clinical and research settings with image-guided interventional pain procedures
Key Highlights
Chemical neurolysis of genicular nerves improves pain and functional outcomes in chronic knee pain. Neurolytic agents used include phenol and alcohol, with image guidance via fluoroscopy, ultrasound, or both. No serious adverse events reported; however, evidence is limited by small sample sizes and study heterogeneity. Guideline-Based Recommendations
Diagnosis
Identify chronic non-cancer knee pain patients, including those with knee osteoarthritis. Consider anatomical knowledge of genicular nerve branches for targeting. Management
Use chemical neurolysis with phenol or alcohol for genicular nerve ablation as a nonsurgical pain management option. Employ image guidance (fluoroscopy, ultrasound, or both) for accurate nerve targeting. Monitoring & Follow-up
Monitor pain relief and functional improvement post-procedure. Observe for adverse events, though serious complications are not reported. Risks
Limited data on complications; no serious adverse events reported in current studies. Potential variability in procedural techniques and neurolytic agent choice may affect outcomes. Patient & Prescribing Data
192 adult patients with chronic non-cancer knee pain from 8 studies including 1 randomized controlled trial
Chemical neurolysis with phenol or alcohol improves pain and function; choice of agent and image guidance varies; further high-quality trials needed.
Clinical Best Practices
Select appropriate genicular nerve targets based on detailed anatomical knowledge. Use image guidance (fluoroscopy and/or ultrasound) to enhance procedural accuracy. Consider chemical neurolysis as an alternative for patients unsuitable for surgery or with persistent pain post-TKA. Recognize current evidence limitations and the need for standardized protocols and further research. References
