What is it?

Nerve roots exit the spine and can become inflamed or compressed, causing arm or leg pain (for example sciatica). A nerve root injection helps reduce inflammation and pain.

Preparation

• Bring prior relevant CT or MRI scans if done elsewhere.
• Inform us if you take blood thinners; some must be stopped 5–7 days before.
• Arrange someone to drive you home.

Risks

This is a safe and commonly performed procedure. Temporary numbness, tingling, weakness, or increased pain may occur and usually resolves within hours. Mild headache or flushing may occur. Steroids may affect blood sugar in diabetics. Rare risks include infection (<0.1%), bleeding, or nerve irritation.

Procedure

The procedure takes approximately 15 minutes and is performed under CT guidance while lying on your stomach. Local anaesthetic is used before a fine needle is placed near the nerve. A brief sharp or electric sensation may be felt. Steroid and anaesthetic are injected. Steroid effects may take up to 2 weeks.

Aftercare

Mild soreness is common. You will be observed briefly after the procedure before discharge. Do not drive for the rest of the day. Rest for 48 hours, then gradually return to normal activity.

Effectiveness

Approximately 75% of patients experience pain relief. Duration of relief varies from days to months. Repeat injections may be required at least one month apart. No more than three injections per nerve are recommended per year.