Selective Nerve Root Block (SNRB)

One of the causes of pain that passes into the extremities is irritation of one or more nerve roots. The purpose of a Selective Nerve Root Block (SNRB) is to block one or more spinal nerves to decrease pain. This is done by injecting an anesthetic and anti-inflammatory steroids into the space around the nerve for the nerve block.

A Selective Nerve Root Block is similar to an epidural steroid injection. This will help determine which particular nerve is related to your symptoms.

Treatments

Purposes for a Selective Nerve Root Block

A Selective Nerve Root Block (SNRB) ia a diagnostic procedure that is used to evaluate patients with:

  • radicular pain
  • stenosis
  • conditions that may result in nerve root compression
Scoliosis
selective nerve root block

WHAT TO EXPECT

Once you have decided to have the injection, the following events take place:

  • Do not eat or drink anything after midnight before your nerve block injection.
  • You can take your regular heart and blood pressure medications on the morning of the nerve block injection with a sip of water. Diabetes medications should not be taken.
  • Discontinue taking anti-inflammatories three days before the nerve block injection.
  • Discontinue taking aspirin products seven days before the nerve block injection.
  • If on blood thinners, call the physician who prescribed the medication to get approval to stop taking them before the injection.
  • You will lie on a table in a procedure room.
  • The skin in the area where the injection will be made will be cleaned.
  • The skin is numbed with lidocaine.
  • Using fluoroscopy (live X-ray) for guidance, the physician directs a needle toward the area of the nerve root to be evaluated.
  • The anesthetic and steroid solution is injected.
  • The injection procedure will take about 30 minutes.
  • You will be in a recovery room for about 30 minutes.
  • It is important that you have someone to drive you home.
  • It is common to experience an increase in pain once the numbing medicine wears off.
  • The steroid does not become effective for 24 hours.
  • Activity should be restricted for the first 4-5 days after the injection.
  • You will need to make an appointment with your doctor to discuss your level of pain relief after the nerve block injection.
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