Selective-Nerve-Root Block

A selective-nerve-root block is typically considered to determine whether pain is being caused by disc problems or nerve-root inflammation. Although MRI scans and other imaging tests are often helpful in locating the source of pain, they may not be able to identify torn or leaking discs.

The Selective-Nerve-Root-Block Procedure

A selective-nerve-root-block procedure is performed with a local anesthetic. In some cases, a mild sedative is administered through an intravenous line. Once a patient's skin is numb from the local anesthetic, a small needle is inserted under guidance of fluoroscopy or other imaging techniques to verify that the needle is positioned properly. Once the needle is in the correct place, injection agent is delivered. 

Recovery from a Selective-Nerve-Root Block

A patient usually returns home on the day of the selective-nerve-root-block procedure, and is usually able to return to work the next day. Immediately after the procedure, a patient often experiences relief from pain, although pain can then worsen for a day or two (this is completely normal). 

Complications of a Selective-Nerve-Root Block

Although complications from a selective-nerve-root block are uncommon, they do exist, and include the following:

• Pain at the injection site
• Infection
• Damage to surrounding tissues

Results of a Selective-Nerve-Root Block

The effectiveness of a selective-nerve-root block varies because it is diagnostic in nature. Some patients will have therapeutic pain relief of varying duration from hours to months. Some will not. All information are helpful in further targeting the source of pain