The journal of pain : official journal of the American Pain Society
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Randomized Controlled Trial
Opioid specific effects on central processing of sensation and pain: a randomized, cross-over, placebo-controlled study.
Moderate to severe pain is often treated with opioids, but central mechanisms underlying opioid analgesia are poorly understood. Findings thus far have been contradictory and none could infer opioid specific effects. This placebo-controlled, randomized, 2-way cross-over, double-blinded study aimed to explore opioid specific effects on central processing of external stimuli. ⋯ Due to the strong correlations with pain relief, the changes in EEG signals during cold-pressor test have the potential to serve as biomarkers of opioid analgesia. PERSPECTIVE: This exploratory study presents evidence of opioid specific effects on the pain system at peripheral and central levels. The findings give insights into which measures are the most sensitive for assessing opioid-specific effects.
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This study compared perceptions of the burden of patient care and associated clinical judgments between physicians and people with chronic pain (PWCP) in a 2 × 3 × 2 between-subjects design that varied participant type, patient-reported pain severity (4/6-8/10), and supporting medical evidence (low/high). One hundred and nine physicians and 476 American Chronic Pain Association members were randomly assigned to 1 of 6 conditions. Respondents estimated the clinical burden they would assume as the treating physician of a hypothetical patient with chronic low back pain, and made clinical judgments regarding that patient. ⋯ PERSPECTIVE: Physicians and people with chronic pain (PWCP) estimated the clinical burden of patient care and made judgments about a hypothetical patient with chronic pain. Physician burden ratings were higher and clinical judgments less favorable, relative to PWCP respondents. These differences could impact treatment collaboration and merit study in clinical practice.
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Persistent pain after groin hernia repair is a major health problem. Sleep disturbance is associated with heightened pain sensitivity. The main objective of this study was to examine the role of sleep disturbance in the development and long-term maintenance of chronic postherniorrhaphy inguinal pain (CPIP), with exploration of sex differences. ⋯ PERSPECTIVE: Females are at heightened risk for CPIP as compared to males. Increased severity of pain symptoms are linked to poorer sleep and psychiatric morbidity. Given the robust associations between sleep disturbance and CPIP, interventions which consolidate and promote sleep, especially in females, may improve long-term pain control.
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Observational Study
Sensory innervation of human bone: an immunohistochemical study to further understand bone pain.
Skeletal diseases and their surgical treatment induce severe pain. The innervation density of bone potentially explains the severe pain reported. Animal studies concluded that sensory myelinated A∂-fibers and unmyelinated C-fibers are mainly responsible for conducting bone pain, and that the innervation density of these nerve fibers was highest in periosteum. ⋯ Further, the results could provide more insight into mechanisms that generate and maintain skeletal pain and might aid in developing new treatment strategies. PERSPECTIVE: This article presents the innervation of human bone and assesses the effect of age, gender, bone compartment and type of bone on innervation density. The presented data provide an explanation for the severity of bone pain arising from skeletal diseases and their surgical treatment.
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Prior research has shown that Open Label Placebos (OLPs; that is, placebos described honestly as inactive pills) are effective for a variety of clinical conditions, including pain. However, little is known about patient attitudes towards OLPs. We conducted qualitative interviews with n = 11 patients (73% female) who recently had hand or wrist surgery and took ≥ 1 opioid pill. ⋯ Results suggest that OLPs appear to be well received as a postoperative pain treatment among the patients in this study. PERSPECTIVE: This qualitative study examines how hand surgery patients view OLPs, which are placebos described honestly as inactive pills. OLPs were generally well received by patients as a treatment for pain after surgery and could be considered as an adjunctive treatment to potentially reduce reliance on prescription opioids.