Articles: low-back-pain.
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A cohort study. ⋯ Women with combined pain were identified to be a target group since they had the most unfavorable course and since the classification of combined pain was found to be a predictor for persistent pain postpartum. Identification of women at risk for persistent pain postpartum seems possible in early pregnancy and requires physical examination and self-reports. Pregnancy had low impact on the course of lumbar pain.
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Randomized Controlled Trial
Percutaneous lumbar zygapophysial (Facet) joint neurotomy using radiofrequency current, in the management of chronic low back pain: a randomized double-blind trial.
A randomized controlled study of percutaneous radiofrequency neurotomy was conducted in 40 patients with chronic low back pain (20 active and 20 controls). ⋯ Our study indicates that radiofrequency facet denervation is not a placebo and could be used in the treatment of carefully selected patients with chronic low back pain.
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Comparative Study
Differences in low back pain behavior are reflected in the cerebral response to tactile stimulation of the lower back.
Two groups of patients with chronic low back pain (cLBP) were scanned with functional magnetic resonance imaging during stimulation of the lower back; those showing 4 or 5 positive Waddell signs (WS-H) and those showing 1 or none (WS-L) as an index of pain-related illness behavior. ⋯ Successful adjustment to cLBP is associated with a patient's ability to effectively engage a sensory modulation system. In patients in whom such activation does not occur, subjective lack of control maypredispose to altered affective and behavioral responses with poor adjustment to pain. Pain experience may be furthermodified by reorganization of somatosensory cortex, contributing to maintenance of the chronic pain state.