Medial Branch Block

The medial branch nerves are small sensory nerves that carry pain signals from the facet joints of the spine. A medial branch block is a diagnostic procedure used when these joints are suspected to be contributing to persistent neck or back pain, particularly pain that remains mainly in the spine rather than travelling down an arm or leg.

Under X-ray guidance, a fine needle is positioned close to the relevant medial branch nerve and a small amount of local anaesthetic is injected. The aim is not to permanently alter the nerve, but to temporarily numb its pain signals so that your response can be assessed accurately. More than one level may be treated when several facet joints are suspected.

The main purpose of a medial branch block is to determine whether the targeted nerves are contributing to your pain. Relief is usually temporary, and the degree and duration of improvement help guide the next stage of treatment, which may include radiofrequency treatment for carefully selected patients. Dr Danesh will discuss the results with you and whether further treatment is appropriate.