Pain
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Chronic musculoskeletal conditions are increasingly conceived as involving altered central nervous system processing, and impaired nociceptive flexor reflex (NFR) appears to reflect altered central nervous system processing. The primary objective was to synthesize the evidence for impaired NFR in these conditions. The secondary objective was to evaluate the NFR stimuli parameters employed by reviewed studies. ⋯ The results indicate that there is evidence of central hyperexcitability in people with chronic musculoskeletal pain. Our review also suggests that shorter inter-pulse duration tends to yield smaller variability in NFR threshold. However, further research investigating optimal stimulation parameters is still warranted.
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Review
Can pain be managed through the Internet? A systematic review of randomized controlled trials.
Given the increasing penetration and health care related use of the Internet, we examined the evidence on the impact of Internet-based interventions on pain. A search of Medline, CINAHL, PsycINFO, and the Cochrane Library was conducted for literature published from 1990 to 2010 describing randomized controlled trials that assessed the effects of Internet-based interventions on patients with pain of any kind. Of 6724 citations, 17 articles were included. ⋯ There was limited (n=2 from same research group) but promising evidence that Internet-based peer support programs can lead to improvements in pain intensity, activity limitation, health distress and self-efficacy; limited (n=4 from same research group) but promising evidence that social networking programs can reduce pain in children and adolescents; and insufficient evidence on Internet-based clinical support interventions. Internet-based interventions seem promising for people in pain, but it is still unknown what types of patients benefit most. More well-designed studies with diverse patient groups, active control conditions, and a better description of withdrawals are needed to strengthen the evidence concerning the impact of Internet-based interventions on people in pain.
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Review
Can pain be managed through the Internet? A systematic review of randomized controlled trials.
Given the increasing penetration and health care related use of the Internet, we examined the evidence on the impact of Internet-based interventions on pain. A search of Medline, CINAHL, PsycINFO, and the Cochrane Library was conducted for literature published from 1990 to 2010 describing randomized controlled trials that assessed the effects of Internet-based interventions on patients with pain of any kind. Of 6724 citations, 17 articles were included. ⋯ There was limited (n=2 from same research group) but promising evidence that Internet-based peer support programs can lead to improvements in pain intensity, activity limitation, health distress and self-efficacy; limited (n=4 from same research group) but promising evidence that social networking programs can reduce pain in children and adolescents; and insufficient evidence on Internet-based clinical support interventions. Internet-based interventions seem promising for people in pain, but it is still unknown what types of patients benefit most. More well-designed studies with diverse patient groups, active control conditions, and a better description of withdrawals are needed to strengthen the evidence concerning the impact of Internet-based interventions on people in pain.
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The magnitude of placebo response and its predictors in fibromyalgia syndrome (FMS) and painful peripheral diabetic neuropathy (DPN) had not been studied. We performed a systematic review by searching MEDLINE, CENTRAL, SCOPUS, and the databases of the U. S. ⋯ Placebo accounted for 45% of the response in the drug groups in FMS and for 62% in painful DPN. The placebo response was higher in painful DPN than in FMS (P<.001). The placebo response was not associated with age, sex, and race, but with year of study initiation, pain baseline, and effect size in active drug groups in both diseases.
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Review Meta Analysis
Systematic review of movement-evoked pain versus pain at rest in postsurgical clinical trials and meta-analyses: a fundamental distinction requiring standardized measurement.
To estimate frequency of movement-evoked pain (MEP) measurement in human postsurgical investigations, we reviewed thoracotomy, knee arthroplasty, and hysterectomy clinical trials and meta-analyses. Only 39% of trials measured MEP and 52% failed to identify pain outcome as pain at rest (PAR) or MEP. Temporal trending did not suggest that MEP measurement is becoming more frequent. ⋯ This is an important problem because MEP is usually more severe than PAR; MEP exerts a more direct adverse impact on postsurgical functional recovery and several current and novel pain treatments differentially affect MEP vs PAR. Failure to distinguish between PAR and MEP and standardize their measurement threatens trial precision and ability to identify interventions with the most clinically relevant effects on pain. We therefore recommend developing consistent terminology regarding PAR and MEP, considering inclusion of MEP as a pain outcome in every postsurgical trial, and standardizing measurement of PAR and MEP on a procedure-specific basis.