Selected Nerve Root Injections

What is SNRI?

Selective nerve root injection, or SNRI, is a nerve block applied via an injection of local anaesthesia and along a specific nerve root. The goal of SNRIs is to relieve pain, discomfort, or irritation occurring as a result of damage or inflammation of the nerve roots in and around the spine.



How Do SNRI Help?

There are several small holes that run along the spinal column; these small holes are known as foramina, and are frequently observed to have nerve roots emerging from them.  When these foramina in the spine are damaged or partially closed as a result an injury or condition affecting the spine, the nerve emerging from the formamina can be pinched, damaged, irritated, or inflamed; this can result in shooting or radiating pain along that specific nerve root path.  When this occurs, your doctor might treat the condition with a selective nerve root injection or block.  Common injuries or conditions treated with SNRI include:
 

  • Herniated or bulging discs
  • Bone spurs
  • Pinched nerve
  • Narrowed nerve and spinal canals

How are Selective Nerve Root Injections Administered?

When administering a selective nerve root block, your doctor will place a small needle directly into the foramina containing the affected nerve root and inject a local anesthetic designed to reduce pain, inflammation, irritation, and other symptoms causing discomfort.
 
The SNRI not only relieves pain and irritation associated with a damaged nerve, it also provides valuable information that will allow your physician to further diagnose the condition causing the problem.
 
The actual selective nerve root injection takes only a minute or two to complete; the patient will notice an immediate relief of symptoms that typically lasts 3 to 4 hours before gradually wearing off.

What are the Risks Associated with Selective Nerve Root Injections?

Selective nerve root injections are considered to be a very safe procedure with very few risks. However, like any injection, there is a slight risk of pain or discomfort at the injection site; this pain is common and should go away a day or two after receiving the procedure.

Dr.Raju Mantena
Dr. Raju Mantena is an anesthesiologist and pain specialist based in the Houston area and has over 15 years of medical experience which he relies upon each day to successfully treat his patients’ acute and chronic pain.
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