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Recent studies on the use of transforaminal epidural steroid injection (TFESI) to treat lumbar radicular pain have highlighted controversies pertaining to the choice of corticosteroid agent utilized in lumbosacral TFESI, in terms of both safety and efficacy. The primary objective was to characterize the radicular pain response after a first transforaminal injection with dexamethasone. The secondary objective was to document the response of those who failed to respond to a dexamethasone injection when particulate steroid was utilized for a second injection.  Methods  It was a retrospective study of 94 consecutive patients undergoing transforaminal injection for lumbosacral radicular pain. At two-week follow-up, patients rated their pain response on a clinically oriented five-point survey. First injection non-responders were given a second injection with particulate steroid and again completed the survey.  Results  Approximately one-third (N = 31/94) of patients received no meaningful relief from a single injection with dexamethasone. No patients achieved lasting and complete pain relief after a single injection. Of initial non-particulate steroid non-responders, approximately two-thirds (N = 19/28) demonstrated a notable or complete response to a second injection with particulate steroid.  Conclusions  We are now able to better inform patients with regard to their anticipated pain response to an initial dexamethasone injection. Only one-third of patients realized more significant and lasting relief after a single injection. Of those who did not demonstrate a more meaningful response, a second injection with particulate steroid resulted in more pronounced pain relief in two-thirds of patients.

Lumbar Radicular Pain Response to First Injection with Non-particulate Steroid