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2015 ; 473
(6
): 1940-56
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Do Epidural Injections Provide Short- and Long-term Relief for Lumbar Disc
Herniation? A Systematic Review
#MMPMID24515404
Manchikanti L
; Benyamin RM
; Falco FJ
; Kaye AD
; Hirsch JA
Clin Orthop Relat Res
2015[Jun]; 473
(6
): 1940-56
PMID24515404
show ga
BACKGROUND: As part of a comprehensive nonsurgical approach, epidural injections
often are used in the management of lumbar disc herniation. Recent guidelines and
systematic reviews have reached different conclusions about the efficacy of
epidural injections in managing lumbar disc herniation. QUESTIONS/PURPOSES: In
this systematic review, we determined the efficacy (pain relief and functional
improvement) of the three anatomic approaches (caudal, lumbar interlaminar, and
transforaminal) for epidural injections in the treatment of disc herniation.
METHODS: We performed a literature search from 1966 to June 2013 in PubMed,
Cochrane library, US National Guideline Clearinghouse, previous systematic
reviews, and cross-references for trials studying all types of epidural
injections in managing chronic or chronic and subacute lumbar disc herniation. We
wanted only randomized controlled trials (RCTs) (either placebo or active
controlled) to be included in our analysis, and 66 studies found in our search
fulfilled these criteria. We then assessed the methodologic quality of these 66
studies using the Cochrane review criteria for RCTs. Thirty-nine studies were
excluded, leaving 23 RCTs of high and moderate methodologic quality for analysis.
Evidence for the efficacy of all three approaches for epidural injection under
fluoroscopy was strong for short-term (< 6 months) and moderate for long-term
(? 6 months) based on the Cochrane rating system with five levels of evidence
(best evidence synthesis), with strong evidence denoting consistent findings
among multiple high-quality RCTs and moderate evidence denoting consistent
findings among multiple low-quality RCTs or one high-quality RCT. The primary
outcome measure was pain relief, defined as at least 50% improvement in pain or
3-point improvement in pain scores in at least 50% of the patients. The secondary
outcome measure was functional improvement, defined as 50% reduction in
disability or 30% reduction in the disability scores. RESULTS: Based on strong
evidence for short-term efficacy from multiple high-quality trials and moderate
evidence for long-term efficacy from at least one high quality trial, we found
that fluoroscopic caudal, lumbar interlaminar, and transforaminal epidural
injections were efficacious at managing lumbar disc herniation in terms of pain
relief and functional improvement. CONCLUSIONS: The available evidence suggests
that epidural injections performed under fluoroscopy by trained physicians offer
improvement in pain and function in well-selected patients with lumbar disc
herniation.