Regional anesthesia and pain medicine
-
Reg Anesth Pain Med · Feb 2025
Role of spinal Barrier-to-Autointegration Factor (BAF) in the epigenetic silencing of the mu-opioid receptor gene in neuropathic pain.
Neuropathic pain presents a significant clinical challenge, with spinal cord epigenetic mechanisms playing a critical role in its development. This study investigated the impact of nerve injury on the Barrier-to-Autointegration Factor (BAF) in the rat spinal dorsal horn. ⋯ These findings suggest that spinal pNR2B receptors may activate BAF, which interacts with LEMD2 to enhance EZH2-mediated H3K27me3 at the mu-opioid receptor promoter after nerve injury. Targeting this pathway may offer novel strategies to inhibit neuropathic pain.
-
Reg Anesth Pain Med · Feb 2025
ReviewRisk factors for persistent postoperative opioid use: an entity distinct from chronic postsurgical pain.
Despite a decline in opioid prescriptions over the past decade, patients commonly receive opioid analgesics as a treatment for postoperative pain in the USA. One complication that patients may experience after surgery is persistent postoperative opioid use (PPOU), or opioid use beyond the typical recovery period. Often defined as beyond 3 months postsurgery, PPOU is frequently conflated with chronic postsurgical pain (CPSP), where pain persists well after the expected healing time following surgery. ⋯ Despite the overlap of some factors, studies typically employ different frameworks when examining PPOU and CPSP, with a biopsychosocial model applied for CPSP and little emphasis on an individual's social environment employed for PPOU. Additionally, existing studies predominantly rely on retrospective insurance claims data, which may not capture the full scope of risk factors. To fill gaps in understanding, investigations may prospectively assess and analyze patient-reported outcomes, implement similar frameworks, and concurrently measure both conditions to advance the scientific understanding of PPOU and CPSP.
-
Reg Anesth Pain Med · Feb 2025
Review Meta AnalysisPrognostic factors of chronic postsurgical pain in children and adolescents: a systematic review and meta-analysis.
Approximately 28% of children and adolescents undergoing major surgery develop chronic postsurgical pain (CPSP; pain persisting>3 months). A previous review attempted to investigate biopsychosocial prognostic factors for pediatric CPSP; however, due to lack of data, no meta-analytic techniques were employed. Since that review, numerous studies have investigated risk/protective factors that fall within an Interpersonal Fear Avoidance Model for CPSP, thus warranting a reinvestigation of prognostic factors. ⋯ CRD42022306340.
-
Reg Anesth Pain Med · Feb 2025
ReviewMachine learning research methods to predict postoperative pain and opioid use: a narrative review.
The use of machine learning to predict postoperative pain and opioid use has likely been catalyzed by the availability of complex patient-level data, computational and statistical advancements, the prevalence and impact of chronic postsurgical pain, and the persistence of the opioid crisis. The objectives of this narrative review were to identify and characterize methodological aspects of studies that have developed and/or tested machine learning algorithms to predict acute, subacute, or chronic pain or opioid use after any surgery and to propose considerations for future machine learning studies. Pairs of independent reviewers screened titles and abstracts of 280 PubMed-indexed articles and ultimately extracted data from 61 studies that met entry criteria. ⋯ We identified variability in sample size, number and type of predictors, and how outcome variables were defined. Patient-reported predictors were highlighted as particularly informative and important to include in such machine learning algorithms, where possible. We hope that findings from this review might inform future applications of machine learning that improve the performance and clinical utility of resultant machine learning algorithms.