Pain
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Low-frequency sinusoidal current applied to human skin evokes local axon reflex flare and burning pain, indicative of C-fibre activation. Because topical cooling works well as a local analgesic, we examined the effect of cooling on human pain ratings to sinusoidal and rectangular profiles of constant current stimulation. Unexpectedly, pain ratings increased upon cooling the skin from 32 to 18°C. ⋯ However, for sinusoidal stimulus profiles, cooling enabled a more effective integration of low-intensity currents over tens of milliseconds resulting in a delayed initiation of action potentials. Our findings indicate that the paradoxical cooling-induced enhancement of electrically evoked pain in people can be explained by an enhancement of C-fibre responsiveness to slow depolarization at lower temperatures. This property may contribute to symptoms of enhanced cold sensitivity, especially cold allodynia, associated with many forms of neuropathic pain.
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Randomized Controlled Trial
Effect of pain neuroscience education after breast cancer surgery on pain, physical, and emotional functioning: a double-blinded randomized controlled trial (EduCan trial).
Pain is one of the most common and long-lasting side effects reported by women surgically treated for breast cancer. Educational interventions may optimize the current physical therapy modalities for pain prevention or relief in this population. Pain neuroscience education (PNE) is an educational intervention that explains the pain experience not only from a biomedical perspective but also the psychological and social factors that contribute to it. ⋯ The change in pain-related disability from baseline to 12 months postoperatively did not differ between the 2 groups (PNE 4.22 [95% confidence interval [CI]: 1.40-7.03], biomedical 5.53 [95% CI: 2.74-8.32], difference in change -1.31 [95% CI: -5.28 to 2.65], P = 0.516). Similar results were observed for all secondary outcomes. Future research should explore whether a more patient-tailored intervention would yield better results.
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Evidence and gap maps (EGMs) can be used to identify gaps within specific research areas and help guide future research agendas and directions. Currently, there are no EGMs within the broad domain of chronic musculoskeletal (MSK) pain in adults. The aim of this study was to create a contemporary EGM of interventions and outcomes used for research investigating chronic MSK pain. ⋯ Few systematic reviews used interdisciplinary interventions (3%) and economic-related outcomes (2%). This contemporary EGM revealed a low proportion of high-quality evidence within chronic MSK pain. This EGM clearly outlines the lack of high-quality research and the need for increased focus on interventions encompassing the entire biopsychosocial perspective.
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Most hospitalized children experience pain that is often inadequately assessed and undertreated. Exposure to undertreated childhood pain is associated with negative short-term and long-term outcomes and can detrimentally affect families, health services, and communities. Adopting electronic medical records (EMRs) in pediatric hospitals is a promising mechanism to transform care. ⋯ A qualitative descriptive study design was used and 14 nursing and medical experts from 5 countries (United States, Canada, United Kingdom, Australia, and Qatar) were interviewed online using Zoom for Healthcare. We applied a reflexive content analysis to the data and constructed 4 broad categories: "capturing the pain story," "working with user-friendly systems," "patient and family engagement and shared decision making," and "augmenting pain knowledge and awareness." These findings outline expert recommendations for EMR designs that facilitate broad biopsychosocial pain assessments and multimodal treatments, and customized functionality that safeguards high-risk practices without overwhelming clinicians. Future research should study the use of patient-controlled and family-controlled interactive bedside technology to and their potential to promote shared decision making and optimize pain care outcomes.
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Randomized Controlled Trial
Psychological and neurological predictors of acupuncture effect in chronic pain patients: a randomized controlled neuroimaging trial.
Chronic pain has been one of the leading causes of disability. Acupuncture is globally used in chronic pain management. However, the efficacy of acupuncture treatment varies across patients. ⋯ Furthermore, support vector machine models applied to the questionnaire and brain features could jointly predict acupuncture improvement with an accuracy of 81.48%. Besides, the correlations and models were not significant in the sham-acupuncture group. These results demonstrate the specific psychological, brain functional, and structural predictors of acupuncture improvement and may offer opportunities to aid clinical practices.