A Treatment for Knee Pain
A genicular nerve block is a minimally invasive procedure that can help reduce chronic knee pain. It works by injecting medication near the small sensory nerves around your knee (called genicular nerves) to block pain signals from reaching the brain.
When Is It Used?
- Chronic knee pain from arthritis or other conditions that don’t respond well to medication, physical therapy, or steroid injections.
- After knee surgery, including knee replacement, to provide additional pain relief.
- As a diagnostic step to see if a more permanent option, such as genicular nerve ablation, might be effective.
What to Expect During the Procedure
The procedure is usually done in an outpatient clinic. You’ll lie on your back with your knee supported. After numbing the skin, the doctor uses imaging guidance like X-ray or ultrasound to place the needle precisely. A mixture of anesthetic and sometimes a steroid is injected around the targeted nerves. The procedure usually takes about 5 to 10 minutes. Afterward, you may rest for a short time before going home the same day.
Benefits
- Reduces knee pain and inflammation.
- Improves mobility and quality of life.
- Provides short-term relief that can last weeks to months, and in some cases longer.
- Helps determine whether you’re a good candidate for genicular nerve ablation, which may provide longer-lasting relief (often up to a year or more).
Risks
Most people tolerate the procedure well, but there are some possible side effects:
- Temporary soreness or bruising at the injection site.
- Mild bleeding or infection, though this is rare.
- Accidental numbness or weakness if the medication spreads to nearby nerves.
- Very rarely, allergic reactions to the injected medications.
Recovery and Results
You can usually resume normal activities right after the procedure, although taking it easy for the rest of the day is recommended. Some people notice pain relief within hours, while for others it may take several days. Relief often lasts about three months on average, though the duration can vary. If the block provides significant relief, your doctor may recommend moving forward with nerve ablation for longer-term results.
A genicular nerve block is a safe and effective option for managing knee pain when other treatments haven’t worked. It can provide important relief, improve function, and help guide decisions about long-term treatment options. Always discuss with your physician to see if this procedure is right for your situation.
When to Call Your Doctor
Contact your healthcare provider if you notice unusual pain, redness, swelling, fever, or any new weakness or numbness after the injection.