Selective Nerve Root Block (SNRB)

Positioning:

• The patient is typically positioned face down on the table for lumbar injections and face up for cervical injections.

Sterilization and Local Anesthesia:

• The skin over the injection site is cleaned with an antiseptic solution, and local anesthesia is injected to numb the area.

Imaging Guidance:

• Using fluoroscopy (X-ray guidance) or CT guidance, the physician inserts a fine needle near the specific nerve root.

Injection of Contrast Dye:

• A small amount of contrast dye is injected to confirm the accurate placement of the needle around the nerve.

Injection of Medication:

• Once confirmed, a mixture of local anesthetic and corticosteroid (anti-inflammatory drug) is injected into the area.
• The anesthetic offers immediate pain relief by numbing the nerve root, while the steroid reduces inflammation, offering longer-term relief.

Duration:

• The procedure typically lasts around 30 minutes, and patients are usually monitored for a short period post-procedure before being discharged.

Although rare, complications may occur, including:

• Infection: Risk of skin or deep tissue infection at the injection site.
• Bleeding: Particularly in patients taking blood thinners.
• Nerve Injury: Injury to the nerve root, though rare, can lead to temporary or permanent numbness or weakness.
• Allergic Reaction: A rare allergic reaction to the contrast dye, anesthetic, or steroid.
• Dural Puncture: Inadvertent puncture of the dura mater (the outer membrane covering the spinal cord) can lead to spinal headaches.
• Increased Pain: Temporary pain flare-up may occur after the injection due to steroid irritation.