Latest Articles
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Paediatric anaesthesia · Mar 2025
Understanding Racial and Ethnic Disparities in Perioperative Pain Management After Routine Pediatric Tonsillectomy.
Hispanic/Latino (H/L) patients are often excluded from studies addressing pain management. Limited data suggests disparities in administration of perioperative opioid analgesia. We hypothesize that H/L patients are less likely to have their pain assessed and managed appropriately with opioids following routine pediatric tonsillectomy. ⋯ Disparities in perioperative pain management following routine pediatric tonsillectomy exist. In contrast with current literature and our prior hypothesis, children of non-H/L ethnicity were less likely to receive opioids and more likely to have their pain assessed. Given H/L patients received fewer pain assessments, they are at risk for inferior pain management. Further understanding of factors driving differences in pain management may improve perioperative patient experience, quality of care, and aid in the creation of more standardized protocols.
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Cell states are influenced by the regulation of gene expression orchestrated by transcription factors capable of binding to accessible DNA regions. To uncover if sex differences exist in chromatin accessibility in the human dorsal root ganglion (hDRG), where nociceptive neurons innervating the body are found, we performed bulk and spatial assays for transposase-accessible chromatin technology followed by sequencing (ATAC-seq) from organ donors without a history of chronic pain. Using bulk ATAC-seq, we detected abundant sex differences in the hDRG. ⋯ Strikingly, XIST, responsible for inactivating 1 X chromosome by compacting it and maintaining at the periphery of the nucleus, was found to be highly dispersed in female neuronal nuclei. This is likely related to the higher chromatin accessibility in X in female hDRG neurons observed using both ATAC-seq approaches. We have documented baseline epigenomic sex differences in the hDRG which provide important descriptive information to test future hypotheses.
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Observational Study
Risk Factors of Failed Conservative Treatment for Adjacent Vertebral Fractures Following Percutaneous Vertebroplasty.
A retrospective, single-center, observational study. ⋯ 3.
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Treating bone cancer pain (BCP) continues to be a clinical challenge, and the underlying mechanisms of BCP remain elusive. This study reports that Wnt5a/Ryk signaling in the dorsal root ganglion neurons is critical to the development of BCP. Tibia bone cavity tumor cell implantation produces spontaneous and evoked behaviorally expressed pain as well as ectopic sprouting and activity of Wnt5a/Ryk signaling in the neural soma and peripheral terminals and the tumor-affected bone tissues. ⋯ Blocking Ryk receptor activation suppresses Wnt5a-induced mechanical allodynia and thermal hyperalgesia. Wnt5a facilitation of transient receptors potential vanilloid type-1 sensitization is blocked by inhibiting c-Jun N-terminal kinase activation. These findings indicate a critical peripheral mechanism of Wnt5a/Ryk signaling underlying the pathogenesis of BCP and suggest that targeting Wnt5a/Ryk in the primary sensory neurons and the tumor-invasive area may be an effective approach for the prevention and treatment of BCP.
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Acta Anaesthesiol Scand · Mar 2025
Conus medullaris termination: Assessing safety of spinal anesthesia in the L2-L3 interspace.
Classic teaching is that spinal anesthesia is safe at or below the L2-L3 interspace. To evaluate this, we sought to determine the percentage of individuals with a conus medullaris termination (CMT) level at or below the L1-L2 interspace. Further, the relationship of CMT level to age, sex, body mass index (BMI), and spinal pathology was examined, as was the reliability of using Tuffier's line (TL) as an anatomical landmark. ⋯ Unlike previous smaller studies, this retrospective study included MRI data from a total of 944 patients. The present study confirms that spinal anesthesia at the L2-L3 interspace or below can be considered safe. The findings indicate that Tuffier's line can be used as a reliable anatomical landmark.