Pain medicine : the official journal of the American Academy of Pain Medicine
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The prevalence of chronic pain ranges from 40% to 80% in long-term care facilities, and it is especially high among older adults who are unable to communicate due to cognitive impairments. Although validated assessment tools exist, pain detection in this population is often done by interdisciplinary evaluation (IE), which largely relies on the subjective impression of health care providers. The aim of this study was to examine the agreement between the IE and validated observational pain tools. ⋯ These results may be explained by an inability of IE to assess pain correctly or by instruments providing false positive results. Nevertheless, as detection of pain is difficult in this population, our research supports the use of validated tools to complement assessment of pain by the IE and make sure that no pain goes undetected.
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Pain medicine still lacks mechanism-specific biomarkers to guide diagnosis and treatment, and defective top-down modulation is an important factor in the pathophysiology of chronic pain conditions. Using modern analytical tools and advanced multivariate statistical analysis, the aim of this study was to revisit two classical potential biomarkers of pro- and anti-nociception in humans (substance P and beta-endorphin), focusing particularly on the cerebrospinal fluid (CSF). ⋯ Patients with chronic neuropathic pain due to trauma or surgery had low levels of beta-endorphin in the CSF. We speculate that this could indicate a defective top-down modulation of pain in chronic neuropathic pain. Our results also illustrate the importance of taking a system-wide, multivariate approach when searching for biomarkers.
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Pain management for patients in hospital is a major problem. There is significant variation in care provision. Evidence is needed about the ways in which acute pain services are organized in order to understand whether these are linked to important differences in patient outcomes. The National Inpatient Pain Study group is a voluntary collaborative venture of inpatient pain specialists in the United Kingdom who are working toward establishing a national prospective database of service provision and activity. ⋯ Prospective longitudinal data has the potential to improve our understanding of variation in process and outcome measures and establish future research priorities.
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The pathobiology of prostate cancer (PCa)-induced bone pain (PCIBP) has both inflammatory and neuropathic components. Previously, we showed that small molecule angiotensin II type 2 receptor (AT2 R) antagonists with >1,000-fold selectivity over the angiotensin II type 1 receptor produced dose-dependent analgesia in a rat model of neuropathic pain. Here, we assessed the analgesic efficacy and mode of action of the AT2 R antagonist, EMA200, in a rat model of PCIBP. ⋯ Small molecule AT2 R antagonists are worthy of further investigation as novel analgesics for relief of intractable PCIBP and other pain types where hyperalgesia worsens symptoms.