Lumbar Sympathetic Block

The lumbar sympathetic chain is a group of nerves alongside the lumbar spine that influences blood flow and nerve activity in the lower limbs. A lumbar sympathetic block may be considered for selected patients with sympathetically mediated lower-limb pain, including some cases of complex regional pain syndrome (CRPS).

Using X-ray guidance, a fine needle is advanced to the appropriate level alongside the lumbar sympathetic chain. After contrast imaging confirms the position, local anaesthetic is injected around the chain. The procedure is performed carefully because important blood vessels, muscles and other structures are located nearby.

A successful block may temporarily reduce pain and can sometimes improve abnormal temperature, colour or sweating in the affected leg or foot. The response can provide useful information about the role of the sympathetic nervous system and may help guide subsequent treatment, including pulsed radiofrequency in selected patients. Dr Danesh will review your response and discuss the next steps.