European journal of pain : EJP
-
The aim of this work was to study whether fear of movement, and pain catastrophizing predict pain related-disability and depression in sub-acute whiplash patients. Moreover, we wanted to test if fear of movement is a mediator in the relation between catastrophizing and pain-related disability/depression as has been suggested by the fear-avoidance model [Vlaeyen JWS, Kole-Snijders AMJ, Boeren RGB, van Eek H. Fear of movement/(re)injury in chronic low back pain and its relation to behavioral performance. ⋯ Pain intensity was a predictor of disability but not of depression. The mediation effect of fear of movement in the relationships between catastrophizing and disability, and between catastrophizing and depression was also supported. The results of this study are in accordance with the fear-avoidance model, and support a biopsychosocial perspective for whiplash disorders.
-
Randomized Controlled Trial Comparative Study Clinical Trial
Effectiveness of a behaviour graded activity program versus conventional exercise for chronic neck pain patients.
Chronic neck pain is a common complaint in the Netherlands with a point prevalence of 14.3%. Patients with chronic neck pain are often referred to physiotherapy and, nowadays, are mostly treated with exercise therapy. It is, however, unclear which type of exercise therapy is to be preferred. ⋯ In both BGA and CE some patients reported recovery from complaints and daily function but the proportion of recovered patients did not exceed 50% during the 12-month follow-up period. Both groups showed clinically relevant improvements in physical secondary outcomes. International Standard Randomised Controlled Trial Number: ISRCTN88733332.
-
Comparative Study
Ultraviolet-B induced inflammation of human skin: characterisation and comparison with traditional models of hyperalgesia.
The effect on human skin of over-exposure to solar ultraviolet radiation (UVR) has been well described. The erythema produced is commonly referred to as 'sunburn'. Recently UVR induced inflammation has been utilised as a human model of sub-acute pain. ⋯ Both thermal burns and topical capsaicin produced large areas of flare, indistinguishable in character from the primary lesions. Moreover, UVB inflammation induced large reductions in mechanical pain threshold restricted to the primary lesion site, whereas the more established inflammatory pain models produced not only primary hypersensitivity but also significant areas of secondary mechanical hypersensitivity. Taken together these findings suggest that UVB inflammation, at least using moderate doses produces sensory changes primarily by sensitising peripheral pain processing in the relative absence of alterations in central pain processing.
-
Randomized Controlled Trial
Perioperative ketamine does not prevent chronic pain after thoracotomy.
Thoracotomy is often responsible for chronic pain, possibly of neuropathic origin. To confirm preclinical studies, the preventive effects of perioperative ketamine were tested in a randomized, double-blind, placebo-controlled clinical trial on persistent neuropathic pain after thoracotomy. Eighty-six patients scheduled for thoracotomy under standardised general anaesthesia were randomised to receive either ketamine (1 mg kg(-1) at the induction, 1 mg kg(-1) h(-1) during surgery, then 1 mg kg(-1) during 24 h; n=42) or normal saline (n=44). ⋯ Ketamine improved immediate postoperative pain, but the groups were similar in terms of neuropathic pain and intake of analgesics, 6 weeks (NPSI score: ketamine: 1.25 [0-4.125]; placebo: 1 [0-4]) and 4 months after surgery. Thus, ketamine given in 24-h infusion failed to prevent chronic neuropathic pain after thoracotomy. Other perioperative preventive long-lasting treatments or techniques could be tested in this context.
-
Randomized Controlled Trial
Cannabinoid-induced effects on the nociceptive system: a neurophysiological study in patients with secondary progressive multiple sclerosis.
Although clinical studies show that cannabinoids improve central pain in patients with multiple sclerosis (MS) neurophysiological studies are lacking to investigate whether they also suppress these patients' electrophysiological responses to noxious stimulation. The flexion reflex (FR) in humans is a widely used technique for assessing the pain threshold and for studying spinal and supraspinal pain pathways and the neurotransmitter system involved in pain control. In a randomized, double-blind, placebo-controlled, cross-over study we investigated cannabinoid-induced changes in RIII reflex variables (threshold, latency and area) in a group of 18 patients with secondary progressive MS. ⋯ The visual analogue scale score for pain also decreased, though not significantly. Conversely, the H/M ratio measured before patients received cannabinoids remained unchanged after therapy. In conclusion, the cannabinoid-induced changes in the RIII reflex threshold and area in patients with MS provide objective neurophysiological evidence that cannabinoids modulate the nociceptive system in patients with MS.