S1 nerve root injection - fluoroscopy
Elderly patient with symptoms attributable to the left S1 nerve root.
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Sciatic nerve root block. Under fluoroscopic guidance, a needle is advanced through the posterior sacral foramen until the pain is reproduced. Perineural and extradural location is confirmed with an injection of a small amount of contrast, following which a mixture of bupivacaine and betamethasone were injected.