Knee Pain Treatment: From Injections to Nerve Ablation
Knee osteoarthritis is one of the most common painful conditions I treat. The range of treatment options available has expanded dramatically in recent years — giving patients with knee pain many more choices between physical therapy and knee replacement.
Here's a guide to the current spectrum of knee pain treatments and which patients tend to benefit from each.
Understanding Knee Osteoarthritis
Knee OA develops when the protective cartilage covering the joint surfaces wears down, eventually leading to bone-on-bone contact. Inflammation, osteophyte (bone spur) formation, and synovial thickening all contribute to pain.
Pain severity doesn't always correlate with X-ray findings — some patients with severe radiographic OA have modest pain, while others with milder imaging changes have severe symptoms.
Treatment Options by Stage
Corticosteroid Injections
The most commonly performed knee injection — steroid reduces joint inflammation and provides relief lasting 1–3 months. Best for acute inflammatory flares or as a bridge while pursuing longer-lasting options.
Limitation: Repeated steroid injections may have adverse effects on cartilage over time. I generally limit steroid injections to 3–4 per year.
Hyaluronic Acid (Viscosupplementation)
Hyaluronic acid injections (Synvisc, Euflexxa, Durolane) supplement the natural joint fluid that provides lubrication. Relief typically takes 2–3 weeks to develop and can last 4–6 months. Ideal for patients who prefer to minimize steroid exposure.
PRP Therapy
PRP uses concentrated growth factors from your own blood to promote cartilage health and reduce inflammation. Multiple systematic reviews now support PRP as providing longer-lasting benefit than steroids — especially at 6–12 months. Best results in mild-to-moderate OA.
My preference: For patients with early-to-moderate knee OA who aren't achieving adequate duration of relief from steroid injections, I recommend PRP as the next step.
Genicular Nerve Block + Radiofrequency Ablation
The genicular nerves are small sensory branches that innervate the knee joint capsule. After confirming these nerves are a pain source with a diagnostic block, radiofrequency ablation disables them — providing relief lasting 9–18 months.
This is particularly valuable for patients with moderate-to-severe OA who are not candidates for or don't want knee replacement.
The pathway:
- Diagnostic genicular nerve blocks
- If positive → Genicular nerve radiofrequency ablation
- 9–18 months of relief per procedure; repeatable
When to Consider Knee Replacement
Surgery is appropriate for patients with:
- Severe, bone-on-bone OA with significant disability
- Failure of comprehensive non-surgical treatment
- Willingness to undergo a major surgery with 6–12 weeks of recovery
For many patients, genicular nerve ablation can delay or eliminate the need for knee replacement — particularly in older or higher-risk surgical patients.
My Recommendation
Don't jump straight from a few months of injections to joint replacement surgery without first discussing genicular nerve ablation and PRP. Call 516-492-3100 to schedule a knee pain consultation.