Interventional Procedures
Nerve Root Injection
Nerve root injections (selective nerve root blocks) deliver corticosteroid and local anaesthetic directly around an inflamed spinal nerve. This can provide significant relief for sciatica and other radicular pain caused by disc herniation or spinal stenosis. CT guidance ensures precise needle placement.
Duration:30-45 minutes
Results:Pain relief typically develops over 3-7 days
What It Involves
- CT guidance identifies the exact nerve root level
- Local anaesthetic numbs the skin and deeper tissues
- A fine needle is carefully guided to the nerve root
- Anti-inflammatory medication is injected around the nerve
Common Conditions Investigated
Sciatica from disc herniationCervical radiculopathy (arm pain from neck)Lumbar radiculopathy (leg pain from lower back)Spinal stenosis-related nerve painPost-surgical nerve inflammationDiagnostic nerve blocks before surgery
Preparation Required
- Cease blood thinners as directed (typically 3-7 days before)
- Avoid food for 4 hours before the procedure
- Arrange transport home – do not drive afterwards
- Bring all spinal imaging (MRI, CT) for review
What to Expect
- You'll lie face down on the CT table
- Local anaesthetic stings briefly before numbing the area
- You may feel pressure or reproduction of your usual pain briefly
- The actual injection takes only a few minutes
After Your Appointment
- Rest for 24 hours following the procedure
- Your leg or arm may feel weak or numb temporarily
- Avoid baths or swimming for 24 hours
- Relief typically builds over 3-7 days