Regional anesthesia and pain medicine
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Reg Anesth Pain Med · Feb 2025
ReviewRole of peripheral nerve stimulation and percutaneous cryoneurolysis in preventing chronic postsurgical pain.
Poorly controlled pain during the acute postoperative period is associated with the development of persistent or 'chronic' pain lasting months or years after surgery. Relatively small trials suggest that local anesthetic-based peripheral nerve blocks lasting hours or a few days may decrease persistent postsurgical pain for some surgical procedures, but definitive data is lacking. Two possible alternatives-percutaneous cryoneurolysis and peripheral nerve stimulation-are analgesic modalities with the potential to provide weeks or months of pain relief following surgery. This increase in analgesic duration raises the possibility of decreased transition from acute to chronic postsurgical pain. ⋯ This review describes percutaneous cryoneurolysis and peripheral nerve stimulation for perioperative analgesia as well as the available evidence supporting their use to prevent persistent postsurgical pain.
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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.
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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.
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Reg Anesth Pain Med · Feb 2025
ReviewInnovations in acute and chronic pain biomarkers: enhancing diagnosis and personalized therapy.
Pain affects millions worldwide, posing significant challenges in diagnosis and treatment. Despite advances in understanding pain mechanisms, there remains a critical need for validated biomarkers to enhance diagnosis, prognostication, and personalized therapy. This review synthesizes recent advancements in identifying and validating acute and chronic pain biomarkers, including imaging, molecular, sensory, and neurophysiological approaches. ⋯ Rigorous validation and standardization efforts are also necessary to ensure these biomarkers are clinically useful. Large-scale collaborative research will be vital to driving progress in this field and implementing these biomarkers in clinical practice. This comprehensive review highlights the potential of biomarkers to transform acute and chronic pain management, offering hope for improved diagnosis, treatment personalization, and patient outcomes.
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Reg Anesth Pain Med · Feb 2025
Global estimates of prevalence of chronic painful neuropathy among patients with chemotherapy-induced peripheral neuropathy: systematic review and meta-analysis of data from 28 countries, 2000-24.
Although the prevalence of chemotherapy-induced peripheral neuropathy (CIPN) has been reported, the proportion of patients with CIPN who report chronic painful neuropathy remains poorly understood, despite its significant impact on patients' quality of life and treatment outcomes. ⋯ This study provides the first comprehensive global estimate of the prevalence of chronic painful CIPN, highlighting its significant burden on patients worldwide. The variation in prevalence across geographical regions, chemotherapy regimens, and primary cancers underscores the need for tailored pain management strategies and further research to address potential disparities.