Pain
-
We used a photochemical method to generate a partial ischemic injury to the infraorbital branch of the trigeminal nerve in rats. Following injury, rats developed a bilateral persistent hypersensitivity to mechanical stimulation in the territory innervated by the infraorbital nerve. In addition, spread of mechanical hypersensitivity beyond the facial region was noted. ⋯ Previous findings have shown that injury to the trigeminal nerve branches may elicit responses that differ from those of segmental spinal nerves. Despite this we conclude that the key sodium channel regulations that are reported as consequences of nerve damage in the dorsal root ganglia seem to appear also in the trigeminal ganglion. Thus, novel analgesic drugs designed to target the sodium channel subtypes involved could be of use for the treatment of orofacial pain.
-
Randomized Controlled Trial
Intersession coping skill practice mediates the relationship between readiness for self-management treatment and goal accomplishment.
Underlying pain self-management treatments is the expectation that patients must adhere to coping skill practice recommendations to obtain treatment benefits. Recently, a model of motivation for pain treatment has proposed that patients' readiness to adopt a self-management approach serves as a predictor of active participation in treatment, and ultimately, of improved outcomes. This study compared the ability of pain readiness to change, as measured by the Pain Stages of Change Questionnaire (PSOCQ), and self-efficacy (SE) ratings, to predict adherence and goal accomplishment in cognitive-behavioral therapy (CBT) for chronic pain. ⋯ SE did not significantly predict either criterion. The statistical relationship between pre-treatment PSOCQ and behavioral goal accomplishment was significantly attenuated when intersession adherence was taken into account. These data provide support for a motivational model of pain treatment that asserts adherence to therapist recommendations for coping skill practice mediates readiness to change and self-reported goal attainments.
-
New studies of the treatment of neuropathic pain have increased the need for an updated review of randomized, double-blind, placebo-controlled trials to support an evidence based algorithm to treat neuropathic pain conditions. Available studies were identified using a MEDLINE and EMBASE search. One hundred and five studies were included. ⋯ In peripheral neuropathic pain, the lowest NNT was for tricyclic antidepressants, followed by opioids and the anticonvulsants gabapentin and pregabalin. For central neuropathic pain there is limited data. NNT and NNH are currently the best way to assess relative efficacy and safety, but the need for dichotomous data, which may have to be estimated retrospectively for old trials, and the methodological complexity of pooling data from small cross-over and large parallel group trials, remain as limitations.
-
Randomized Controlled Trial
The development and preliminary validation of the Profile of Chronic Pain: Extended Assessment Battery.
The aim of the present research was the development and validation of a set of instruments, collectively called the Profile of Chronic Pain: Extended Assessment Battery (PCP:EA), designed to be administered to adults (between the ages of 25 to 80) after establishing the existence of a chronic pain problem. The final 86-item version of the PCP:EA consisted of 33 single items assessing: pain location and severity, pain characteristics (e.g. worst daily pain), medication use, health care status, the identity of the most important person in the patient's life, and functional limitations in 10 areas of daily living. In addition, the PCP:EA includes 13 multi-item subscales addressing aspects of coping (guarding, ignoring, task persistence, and positive self-talk), catastrophizing, pain attitudes and beliefs (including disability beliefs, belief in a medical cure for pain, belief in pain control, and pain-induced fear), and positive (tangible and emotional) and negative (insensitivity and impatience) social responses. ⋯ Stratified sampling was employed to assure equal gender and age group representation across three age groupings (25-44; 45-64; 65-80). Two survey studies provided strong evidence for the hypothesized factor structure, internal consistency, independence from response bias, and validity of the PCP:EA. Moreover, the presence of normative data enhance the diagnostic and prescriptive utility of the instrument.