The Clinical journal of pain
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Randomized Controlled Trial Clinical Trial
Nerve root sleeve injections in patients with failed back surgery syndrome: a comparison of three solutions.
To evaluate outcome in patients with failed back surgery syndrome treated with nerve root sleeve injections. ⋯ Overall, although injections induced analgesia at 1 month, these effects were reduced at 3- and 6-month follow-ups. No statistical differences were found between the three treatment groups (after 1 month, p = 0.71; after 3 months, p = 0.69; after 6 months, p = 0.66. The Friedman test showed a significant decrease in treatment score as a function of time in groups B and C (p = 0.015) but not in group A (p = 0.074). Corticosteroids seem responsible for the last phenomenon.