Stellate Ganglion Block

A stellate ganglion block is performed under fluoroscopy to determine if there is damage to the sympathetic nerve chain and if it is the source of the patient’s arm pain. The block is  primarily diagnostic in nature, but it may provide pain relief beyond the duration of the anesthetic.

A local skin anesthetic is given near the base of the neck on the affected side. A needle is inserted by the anesthesiologist near the transverse process of the cervical spine (usually at the cervical-6 level). A sterile tubing is attached to the needle and anesthetic medication is slowly injected through the tubing.

The patient may note increased warmth and redness of the painful arm during and after the injection. The patient can expect hoarseness of their voice, redness of the eye, drooping of the eyelid and pupillary constriction for four to eight hours after the injection. The patient’s pain relief may be immediately noticeable.  However, the duration of relief is variable. The patient must assess the level of pain relief over the first few hours after the injection and report this to the physician.