Pain
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Randomized Controlled Trial Multicenter Study Clinical Trial
Pain and analgesic response after third molar extraction and other postsurgical pain.
There is uncertainty over whether the patient group in which acute pain studies are conducted (pain model) has any influence on the estimate of analgesic efficacy. Data from four recently updated systematic reviews of aspirin 600/650 mg, paracetamol 600/650 mg, paracetamol 1000 mg and ibuprofen 400 mg were used to investigate the influence of pain model. Area under the pain relief versus time curve equivalent to at least 50% maximum pain relief over 6 h was used as the outcome measure. ⋯ The event rate with placebo was systematically statistically lower for dental than postsurgical pain for all four treatments. Event rates with analgesics, RB and NNT were infrequently different between the pain models. Systematic difference in the estimate of analgesic efficacy between dental and postsurgical pain models remains unproven, and, on balance, no major difference is likely.
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Randomized Controlled Trial Comparative Study Clinical Trial
Addition of ultralow dose naloxone to postoperative morphine PCA: unchanged analgesia and opioid requirement but decreased incidence of opioid side effects.
Ultralow doses of naloxone (0.001-0.1 microg/kg) produce analgesia in animal models. However, no clinical study has evaluated the combination of ultralow dose naloxone and morphine using patient-controlled analgesia (PCA). This randomized, double blind controlled study sought to determine if the combination of ultralow dose naloxone and morphine in PCA solutions affects opioid requirements, analgesia, and side effects. ⋯ The morphine+naloxone group had a lower incidence of nausea and pruritus than the morphine group (P=0.01 for both symptoms). However, the incidence of vomiting, time to tolerate fluids, sedation, and urinary retention were similar between groups (all P values >0.1). The combination of ultralow dose naloxone and morphine in PCA does not affect analgesia or opioid requirements, but it decreases the incidence of nausea and pruritus.
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This study examined whether marital functioning variables related uniquely to psychological distress and diagnoses of depressive disorder independent of pain severity and physical disability. Participants were 110 chronic musculoskeletal pain patients. Hierarchical regression results showed that marital variables (i.e. marital satisfaction, negative spouse responses to pain) contributed significantly to depressive and anxiety symptoms over and above the effects of pain severity and physical disability. ⋯ In multivariate analyses, physical disability and marital satisfaction were uniquely related to depressive symptoms whereas physical disability, pain severity, and negative spouse responses to pain were uniquely related to anxiety symptoms. Only physical disability was uniquely related to major depression. The results suggest that models of psychological distress in chronic pain patients might be enhanced by attributing greater importance to interpersonal functioning and increasing attention to anxiety.
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Vulvar vestibulitis syndrome (VVS) is a common cause of dyspareunia in pre-menopausal women. Previous quantitative sensory test (QST) studies have demonstrated reduced vestibular pain thresholds in these patients. Here we try to find whether QST findings correlate to disease severity. ⋯ This test had the highest kappa value (0.82), predicting correctly 88% of all VVS cases and 100% of the severe VVS cases. Supra-threshold pain magnitude estimation for tonic heat stimulation also had a high kappa value (0.73) predicting correctly 82% overall with a 100% correct diagnosis of the control group. QST techniques, both threshold and supra-threshold measurements, seem to be capable of discriminating level of severity of this clinical pain syndrome.