A peripheral nerve block is an image-guided injection that places anesthetic, often with a small amount of steroid, directly around a specific peripheral nerve to help diagnose the source of localized pain and to calm neuropathic symptoms.
OVERVIEW
What a peripheral nerve block is and how it works
Peripheral nerves are the cabling that carries sensation from your skin, muscles, and joints back toward the spinal cord. When one of these nerves is irritated, compressed, or injured, it can fire pain signals out of proportion to any ongoing tissue damage, producing burning, shooting, tingling, or electric-shock sensations in the area it supplies. A peripheral nerve block interrupts that signaling close to its source.
At Columbia Pain & Spine Institute, the physician uses live imaging, most often ultrasound or fluoroscopy (X-ray), to guide a thin needle precisely alongside the targeted nerve. A local anesthetic is delivered around the nerve to temporarily quiet its pain signals, and in many cases a small dose of corticosteroid is added to help reduce inflammation for potentially longer-lasting relief.
The procedure can serve two purposes. As a diagnostic tool, the pattern of relief in the hours after the injection helps confirm whether that particular nerve is the generator of your pain. As a therapeutic treatment, the block can ease symptoms and, by lowering nerve irritation, support physical therapy and other parts of your care plan. “Peripheral nerve block” is a general term; your physician selects the specific nerve and approach based on where your pain maps. For named targets we offer dedicated procedures such as the occipital nerve block, intercostal nerve block, and suprascapular nerve block.
CONDITIONS
Conditions a peripheral nerve block can treat
Peripheral nerve blocks are used for localized neuropathic pain in many regions of the body. Common reasons your physician may recommend one include:
Commonly treats
Because peripheral nerve pain often overlaps with other diagnoses, your physician may also consider a trigger point injection for a muscular component, or a sympathetic nerve block when pain follows a sympathetically maintained pattern such as complex regional pain syndrome. You can review the full range of options under nerve blocks and our broader services.
YOUR VISIT
What to expect
Before
Your physician reviews your history, exam, and any imaging or nerve studies to confirm which nerve to target. Tell us about blood thinners, allergies, and current medications, since some may need to be paused beforehand. The injection is performed at our Gresham or Portland, Oregon offices. Most peripheral nerve blocks do not require sedation, so you can usually drive yourself.
During
You are positioned to expose the treatment area, and the skin is cleaned. Using ultrasound or fluoroscopic guidance, the physician advances a fine needle to the nerve and confirms placement before injecting the anesthetic, sometimes combined with steroid. The active portion typically takes only a few minutes, and the full appointment is usually well under an hour.
After
You may feel numbness, warmth, or noticeable relief in the nerve’s territory within minutes as the anesthetic takes effect. We monitor you briefly, then you go home the same day. Soreness at the injection site for a day or two is normal. If a steroid was used, any longer-term benefit often builds over several days.
Keep track of how much relief you get and how long it lasts. That feedback is what guides the next step, whether that is repeating the block, adding therapy, or considering a longer-acting option such as radiofrequency ablation or a peripheral nerve stimulator when appropriate.
QUESTIONS
Frequently asked questions
Is a peripheral nerve block diagnostic or therapeutic?
It can be both. The relief after the anesthetic helps confirm whether the targeted nerve is the source of your pain (diagnostic), while any added steroid and reduced nerve irritation can provide ongoing symptom relief (therapeutic). Your physician will explain which goal applies to your block.
How long does the relief last?
This varies. The anesthetic portion wears off within hours, but if inflammation was driving your pain, a steroid effect can last weeks or longer for some patients. Because responses differ from person to person, we make no guarantees and instead use your results to plan the next step.
How do I get scheduled or referred?
Columbia Pain & Spine Institute is an interventional pain practice serving Gresham, Portland, and the greater Portland metro. Patients can call our office at (503) 382-8100, and referring providers may fax records to (503) 382-8120. Visit our contact page for directions and details.