What are Nerve Root Blocks?
A nerve root block is an injection of a local anesthetic and steroid injected under X-ray guidance to diagnose and treat cervical, thoracic and lumbar pain and associated extremity pain in the arms or legs. It is a minimally invasive, state-of-the-art pain management treatment to help address acute and chronic pain. Nerve blocks can be used for various purposes, including:
- Diagnostics. Diagnostic nerve blocks can help to determine sources of pain.
- Prognostics. Prognostic nerve blocks can help predict the outcomes of given treatments, such as determining whether or not surgery would be successful in treating pain. In some cases, nerve blocks can even be used to avoid surgery.
- Preemptive action. Preemptive nerve blocks can be used to prevent forthcoming pain from certain procedures, such as treating phantom limb pain.
- Therapeutics. Therapeutic nerve blocks can be used to treat potential conditions. They contain local anesthetics to manage acute pain.
Conditions commonly treated with nerve root blocks include:
- Cervical radiculopathy
- Lumbar radiculopathy
- Failed back surgery syndrome
- Spinal stenosis
- Bulging intervertebral discs
- Herniated discs
- Arthritis of the spine
What Can Patients Expect From a Nerve Root Block?
What Are the Results of a Nerve Root Block?
The success rate of selective nerve root blocks varies among patients because some nerve roots are tougher to treat than others due to their location and surrounding structures. For some patients, pain improves immediately following the injection from the local anesthetic. The steroid typically takes two or three days to take effect – peaking in approximately two weeks.
A pain management specialist will recommend using an ice pack three or four times each day to help alleviate any tenderness. After the injection, patients can resume their normal pain medication regimen, although it is important to keep track of pain levels in order to determine how effective the nerve block was.
Symptom relief can last anywhere from a few days to a couple of months and, if necessary, the procedure can be repeated.