The Clinical journal of pain
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Review Case Reports
Chemical sympathectomy for neuropathic pain: does it work? Case report and systematic literature review.
To determine if chemical sympathectomy successfully reduces limb neuropathic pain. ⋯ Based on the case reported and systematic literature review, chemical sympathectomy seems to have at best a temporary effect, limited to cutaneous allodynia. Despite the popularity of chemical sympatholysis, only few patients and poorly defined outcomes are reported in the literature, substantiating the need for well-designed studies on the effectiveness of the procedure.
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The purpose of this review was to determine how effective surgery and injection therapy are in the management of chronic pain. ⋯ Standard discectomy compared with conservative treatment for proven disc herniation (< or = 1 year) and local triamcinolone injection for lateral epicondylitis (< or = 12 weeks) are both effective for pain relief (level 2). There was limited evidence of effectiveness (level 3) of intraoperative steroid at discectomy, epidural steroid injection for sciatica with low back pain, caudal steroid injection for low back pain, local glycosaminoglycan polyphosphate injection for lateral epicondylitis, intraarticular steroid injection for shoulder arthritis, subacromial steroid injections for rotator cuff tendinitis, nonspecific injections for painful shoulder, systemic growth hormone for fibromyalgia, and intravenous adenosine for fibromyalgia. There was limited evidence (level 3) that there is no additional benefit of adding steroid to local anesthetic in caudal epidural injections. There is limited evidence (level 3) that intravenous adenosine is ineffective for fibromyalgia. The remaining evidence was inadequate (level 4a) or contradictory (level 4b).
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Disability is a multifactorial phenomenon. Social scientists suggest that nonclinical factors, including age, education, and job status, correlate with disability. ⋯ Lack of modified work and lack of work autonomy predicted chronic pain disability (level 2). There was limited evidence (level 3) that lack of job satisfaction, perception of difficult job conditions and demands, heavy physical demands of the job, private rather than public employment, and lower socioeconomic group predict chronic pain disability. The number of years employed varied as a predictor in different studies (level 4b).
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What is the role of psychological factors in chronic pain and chronic pain disability? ⋯ Because of the small number of studies, there was inadequate evidence that chronic pain results from a prior psychiatric disorder (level 4a). The studies provided limited evidence (level 3) that chronic depression plays a role in the development of new pain locations (although not for low back pain); that prior nervousness and past negative life events predict work disability; and that depression, anxiety, and a sense that control rests outside of one's own self may predict slower recovery from pain and disability. These findings do not prove that psychological factors have a role in the development of chronic pain. Psychological impairment may precede the onset of pain. Based on current knowledge, it may also arise as a complication of chronic pain.
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The purpose of this review was to determine how effective acupuncture, transcutaneous electrical nerve stimulation, acupuncture-like transcutaneous nerve stimulation, laser therapy, electrical nerve stimulation, and neuroreflexotherapy are in the management of chronic pain. ⋯ In general, the evidence was contradictory or inadequate, reflecting poor study methodologies. No positive conclusion could be reached for acupuncture, transcutaneous electrical nerve stimulation, acupuncture-like transcutaneous nerve stimulation, laser therapy, or neuroreflexotherapy. A single randomized controlled trial provided limited evidence (level 3) that electrical nerve stimulation is effective for pain relief in myofascial pain syndrome for up to 4 weeks, but further study in humans is needed. Future randomized controlled trials and systematic reviews should include subgroup analyses of sham acupuncture and inert placebos as controls.