Diagnostic Nerve Block

That is a useful result. It rules one part out and points the search elsewhere. It keeps a longer procedure from being wasted on the wrong target.

Then that part is not the source, which truly narrows the search. A negative block is information, not a wasted visit.

Scans show structure. Degenerative changes are very common in people with no pain at all. A block tests function.

Yes. It is the part that tells us whether the test worked. Record your pain before, and then every so often for several hours afterward.

Not long, and that is on purpose. The block uses a small amount of local anesthetic. So the relief is short by design and lasts only while the anesthetic is working. The useful part is what happens in that window. You keep a pain diary for several hours afterward, and that record is the real result. A diagnostic block is a test, not a treatment.

You can usually drive yourself home. Keep the pain diary as instructed. Record your pain every so often for several hours. During the anesthetic window, do the activity that usually brings on your pain, because that is what tests the block properly. Do not take extra painkillers that day. Extra medication makes the result unreadable and wastes the procedure.

Because the test depends on a clean reading. The question is whether your pain goes away while one part is numbed. If you take extra painkillers during the test window, any relief could come from the pills instead of the block. Then the result can no longer be read. That is the main danger of a diagnostic block: misreading it, not harm.

The numbness fades and your familiar pain comes back, usually over a few hours as the anesthetic clears. That return is part of the result, not a letdown: pain that leaves when the block takes hold and returns when it wears off is the pattern that proves the target. Write down the time it comes back. Relief that outlasts the anesthetic by days is worth reporting too, because it is read differently. The medial branch block shows how that timing decides whether ablation comes next.

Nerve blocks grew out of anesthesiology, and most are performed by interventional pain physicians trained in it. Here, every block is done by Dr. Gurpreet Singh Padda, MD, MBA, MHP, board certified in anesthesiology and interventional pain management, under live image guidance in our own facility. The doctor who examined you is the one placing the needle, so the block tests exactly what the exam suggested.