What is a selective nerve root block?
A selective nerve root block is an injection of an anti-inflammatory steroid (e.g., dexamethasone or triamcinolone) along a specific nerve root. Along the spine, there are several “holes” or “foramina” through which nerve roots emerge. If these foramina are partially closed from bulging disks, bone spurs, misalignment of vertebrae, etc., the nerve root can also be pinched. This typically causes a shooting or radiating pain along that nerve root. In a selective nerve root block, a small needle is placed in the foramen alongside the nerve root and the steroid dose is injected. Why is it done? When the nerves in the foramina are irritated or pinched by a bulging disk, narrowed “nerve canal” or bone spur, the resulting inflammation can cause pain, numbness, or tingling. The steroid injected can reduce inflammation of nerves in the specific foramen and thus reduce pain and other symptoms. How long does it take to do? The actual injection takes only a few minutes. Please allow about an hour
