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  • Title: A pilot study examining the effectiveness of physical therapy as an adjunct to selective nerve root block in the treatment of lumbar radicular pain from disk herniation: a randomized controlled trial.
    Author: Thackeray A, Fritz JM, Brennan GP, Zaman FM, Willick SE.
    Journal: Phys Ther; 2010 Dec; 90(12):1717-29. PubMed ID: 20864600.
    Abstract:
    BACKGROUND: Therapeutic selective nerve root blocks (SNRBs) are a common intervention for patients with sciatica. Patients often are referred to physical therapy after SNRBs, although the effectiveness of this intervention sequence has not been investigated. OBJECTIVE: This study was a preliminary investigation of the effectiveness of SNRBs, with or without subsequent physical therapy, in people with low back pain and sciatica. DESIGN: This investigation was a pilot randomized controlled clinical trial. SETTING: The settings were spine specialty and physical therapy clinics. PARTICIPANTS: Forty-four participants (64% men; mean age=38.5 years, SD=11.6 years) with low back pain, with clinical and imaging findings consistent with lumbar disk herniation, and scheduled to receive SNRBs participated in the study. They were randomly assigned to receive either 4 weeks of physical therapy (SNRB+PT group) or no physical therapy (SNRB alone [SNRB group]) after the injections. INTERVENTION: All participants received at least 1 SNRB; 28 participants (64%) received multiple injections. Participants in the SNRB+PT group attended an average of 6.0 physical therapy sessions over an average of 23.9 days. MEASUREMENTS: Outcomes were assessed at baseline, 8 weeks, and 6 months with the Low Back Pain Disability Questionnaire, a numeric pain rating scale, and the Global Rating of Change. RESULTS: Significant reductions in pain and disability occurred over time in both groups, with no differences between groups at either follow-up for any outcome. Nine participants (5 in the SNRB group and 4 in the SNRB+PT group) underwent surgery during the follow-up period. LIMITATIONS: The limitations of this study were a relatively short-term follow-up period and a small sample size. CONCLUSIONS: A physical therapy intervention after SNRBs did not result in additional reductions in pain and disability or perceived improvements in participants with low back pain and sciatica.
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