The Clinical journal of pain
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Heterogeneity of outcome domains, used in interventional trials and systematic reviews (SRs) for neuropathic pain (NeuP), makes decisions on the comparative effectiveness of available treatments difficult. This study analyzed outcome domains and measures used in SRs of randomized controlled trials on efficacy and safety of interventions for NeuP and compared them with the core outcome set (COS) and core outcome measures (COMs) for chronic pain recommended by the Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (IMMPACT). ⋯ Authors of SRs in the field of NeuP insufficiently use relevant recommended COS and COMs for chronic pain. More effort should be put into the implementation of COS to ensure that the study results can be compared and combined. There is a need for defining core outcome domains and measures specific for NeuP.
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Since approval of intravenous acetaminophen (IV APAP), its use has become quite common without strong positive evidence. Our goal was to determine the effect of IV APAP on length of hospital stay (LOS) via mediation of opioid-related side effects in pediatric patients. ⋯ IV APAP hastens oral intake and is associated with decreased LOS in an adolescent surgery population likely through decreased opioid consumption. Through addition of IV APAP in this population, LOS may be decreased, an important implication in the setting of escalating health care costs.
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Hyperalgesia and allodynia are typical signs of neuropathic pain. Quantitative sensory testing (QST) is a validated tool to clinically assess these phenomena. However, whether QST reveals findings that are reported by the patients is unclear. The aim of this study was therefore to investigate the association between self-reported symptoms assessed with the painDETECT questionnaire (PDQ) with results of validated QST. ⋯ Results demonstrate that self-reported PDQ symptoms cannot predict abnormal QST values. The poor predictive power of the PDQ may depend on several factors based on possibility of comparison between PDQ and QST and also on methodical issues. Both, symptoms (questionnaires) and signs address complementary aspects of the pain experience and should be considered for diagnosis and treatment of neuropathic pain.
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To replicate a study by Schutze and colleagues on a headache sample, rather than a heterogenous chronic pain sample, investigating whether level of mindfulness predicts key components in the Fear-Avoidance Model of chronic pain (pain intensity, negative affect, pain catastrophizing, pain-related fear, pain hypervigilance, and functional disability); to investigate the relationships between level of mindfulness and headache/migraine pain intensity, frequency, and duration. ⋯ Findings suggest that mindfulness may be integrated into the Fear-Avoidance Model of chronic pain for individuals with chronic headache/migraine. Directions for future research are discussed.
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In chronic low back pain (CLBP) patients, study of altered brain metabolites in the anterior cingulate cortex (ACC) using magnetic resonance spectroscopy (MRS) could reveal the detailed pathology of CLBP and depression. The aim was to detect the central difference between CLBP and controls by means of measuring the metabolites in the ACC, and to analyze the correlations between depression and metabolites in ACC. ⋯ Lower NAA levels and higher Glx/creatine and Glx/myoinositol ratios in the ACC of CLBP participants compared with controls were revealed. The result suggests the hypothesis that excessive Glx leads to neuronal dysfunction and/or death, which was reflected as a low NAA level in the ACC of individuals with CLBP. Measurement of these metabolites using MRS potentially helps evaluate CLBP patients' condition and psychological status objectively.