Publications by authors named "Leon D Sanchez"

Background: Chronic pain following traumatic stress exposure (TSE) is common. Increasing evidence suggests inflammatory/immune mechanisms are induced by TSE, play a key role in the recovery process versus development of post-TSE chronic pain, and are sex specific. In this study, we tested the hypothesis that the inflammatory marker C-reactive protein (CRP) is associated with chronic pain after TSE in a sex-specific manner.

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  • This study investigates how early social support after trauma affects PTSD symptoms over time and explores specific brain regions involved in this process, such as the amygdala and ventromedial prefrontal cortex.
  • Using data from 315 participants in the AURORA study, researchers measured PTSD symptoms and perceived emotional support at multiple time points, while also conducting neuroimaging two weeks post-trauma.
  • The results show that early emotional support is linked to changes in white matter connectivity between key brain areas, but it also highlighted unexpected increased threat reactivity in the default mode network, suggesting complex neural pathways in response to social threats.
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  • - The study explored the use of wrist-wearable devices to track heart rate variability (HRV) as potential biomarkers for recovery from adverse neuropsychiatric effects following traumatic events, specifically in a socioeconomically disadvantaged group.
  • - Researchers monitored participants within 72 hours of a traumatic event and over a course of 6 months, validating HRV characteristics linked to various posttraumatic symptoms, such as pain, re-experiencing, and anxiety.
  • - The findings indicate that changes in HRV could effectively predict improvements or worsening in symptoms, suggesting that these wearable technologies could serve as useful screening tools for identifying posttraumatic stress in high-risk populations.
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  • - The study investigates sex/gender differences in PTSD by examining 16 risk factors and their impact on PTSD severity in a group of 2,924 acutely traumatized individuals.
  • - It finds that six risk factors are more prevalent in women, while none are more pronounced in men, highlighting unique pathways contributing to PTSD severity based on sex assigned at birth.
  • - The results indicate different risk mechanisms for men and women, suggesting that understanding these differences can help develop targeted mental health interventions and inform future research on other mental disorders.
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Importance: Research on resilience after trauma has often focused on individual-level factors (eg, ability to cope with adversity) and overlooked influential neighborhood-level factors that may help mitigate the development of posttraumatic stress disorder (PTSD).

Objective: To investigate whether an interaction between residential greenspace and self-reported individual resources was associated with a resilient PTSD trajectory (ie, low/no symptoms) and to test if the association between greenspace and PTSD trajectory was mediated by neural reactivity to reward.

Design, Setting, And Participants: As part of a longitudinal cohort study, trauma survivors were recruited from emergency departments across the US.

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The neurocardiac circuit is integral to physiological regulation of threat and trauma-related responses. However, few direct investigations of brain-behavior associations with replicable physiological markers of PTSD have been conducted. The current study probed the neurocardiac circuit by examining associations among its core regions in the brain (e.

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Background: Knowledge of sex differences in risk factors for posttraumatic stress disorder (PTSD) can contribute to the development of refined preventive interventions. Therefore, the aim of this study was to examine if women and men differ in their vulnerability to risk factors for PTSD.

Methods: As part of the longitudinal AURORA study, 2924 patients seeking emergency department (ED) treatment in the acute aftermath of trauma provided self-report assessments of pre- peri- and post-traumatic risk factors, as well as 3-month PTSD severity.

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There are significant challenges to identifying which individuals require intervention following exposure to trauma, and a need for strategies to identify and provide individuals at risk for developing PTSD with timely interventions. The present study seeks to identify a minimal set of trauma-related symptoms, assessed during the weeks following traumatic exposure, that can accurately predict PTSD. Participants were 2185 adults (Mean age=36.

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Objectives: One of the most pivotal decisions an emergency physician (EP) makes is whether to admit or discharge a patient. The emergency department (ED) work-up leading to this decision involves several resource-intensive tests. Previous studies have demonstrated significant differences in EP resource utilization, measured by lab tests, advanced imaging (magnetic resonance imaging [MRI], computed tomography [CT], ultrasound), consultations, and propensity to admit a patient.

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Introduction: A solution for emergency department (ED) congestion remains elusive. As reliance on imaging grows, computed tomography (CT) turnaround time has been identified as a major bottleneck. In this study we sought to identify factors associated with significantly delayed CT in the ED.

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Background: Post-traumatic stress disorder (PTSD) and substance use (tobacco, alcohol, and cannabis) are highly comorbid. Many factors affect this relationship, including sociodemographic and psychosocial characteristics, other prior traumas, and physical health. However, few prior studies have investigated this prospectively, examining new substance use and the extent to which a wide range of factors may modify the relationship to PTSD.

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Background: Females are more likely to develop posttraumatic stress disorder (PTSD) than males. Impaired inhibition has been identified as a mechanism for PTSD development, but studies on potential sex differences in this neurobiological mechanism and how it relates to PTSD severity and progression are relatively rare. Here, we examined sex differences in neural activation during response inhibition and PTSD following recent trauma.

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Objectives: The role of biological sex in interprofessional relationships is an important factor in collaborative health care settings such as the emergency department (ED) but one that has been sparsely studied. While there is anecdotal evidence on gender-based differences in communication, little research has focused on this topic. The goal of this study was to determine whether there are differences in paging frequency between nurses and male and female residents.

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Background: Considerable variability exists in emergency physicians' (EPs) rates of resource utilization, which may cluster in distinct patterns. However, previous studies have focused on academic and tertiary care centers, and it is unclear whether similar patterns exist in community practice.

Objective: Our aim was to examine whether EPs practicing in community emergency departments (EDs) have practice patterns similar to those of academic EDs.

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Introduction: Restraint use in the emergency department (ED) can pose significant risks to patients and health care workers. We evaluate the effectiveness of Code De-escalation- a standardized, team-based approach for management and assessment of threatening behaviors- in reducing physical restraint use and workplace violence in a community ED.

Methods: A retrospective observational study of a pathway on physical restraint use among patients placed on an involuntary psychiatric hold in a community ED.

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Introduction: There are substantial inequities in oral health access and outcomes in the USA, including by income and racial and ethnic identity. People with adverse social determinants of health (aSDoH), such as housing or food insecurity, are also more likely to have unmet dental needs. Many patients with dental problems present to the emergency department (ED), where minimal dental care or referral is usually available.

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Patients exposed to trauma often experience high rates of adverse post-traumatic neuropsychiatric sequelae (APNS). The biological mechanisms promoting APNS are currently unknown, but the microbiota-gut-brain axis offers an avenue to understanding mechanisms as well as possibilities for intervention. Microbiome composition after trauma exposure has been poorly examined regarding neuropsychiatric outcomes.

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Background: Many academic medical centers (AMC) transfer patients who require admission but not tertiary care to partner community hospitals from their emergency departments (ED). These transfers alleviate ED boarding but may worsen existing healthcare disparities. We assessed whether disparities exist in the transfer of patients from one AMC ED to a community hospital General Medical Service.

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Background: Prior sexual trauma (ST) is associated with greater risk for posttraumatic stress disorder after a subsequent traumatic event; however, the underlying neurobiological mechanisms remain opaque. We investigated longitudinal posttraumatic dysfunction and amygdala functional dynamics following admission to an emergency department for new primarily nonsexual trauma in participants with and without previous ST.

Methods: Participants ( = 2178) were recruited following acute trauma exposure (primarily motor vehicle collision).

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Importance: Emergency department (ED) triage substantially affects how long patients wait for care but triage scoring relies on few objective criteria. Prior studies suggest that Black and Hispanic patients receive unequal triage scores, paralleled by disparities in the depth of physician evaluations.

Objectives: To examine whether racial disparities in triage scores and physician evaluations are present across a multicenter network of academic and community hospitals and evaluate whether patients who do not speak English face similar disparities.

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Importance: Differences in neighborhood socioeconomic characteristics are important considerations in understanding differences in risk vs resilience in mental health. Neighborhood disadvantage is associated with alterations in the function and structure of threat neurocircuitry.

Objective: To investigate associations of neighborhood disadvantage with white and gray matter and neural reactivity to positive and negative stimuli in the context of trauma exposure.

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Introduction: Emergency departments (ED) employ many strategies to address crowding and prolonged wait times. They include front-end Care Initiation and clinician-in-triage models that start the diagnostic and therapeutic process while the patient waits for a care space in the ED. The objective of this study was to quantify the impact of a Care Initiation model on resource utilization and operational metrics in the ED.

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  • The study investigates how alcohol and cannabis use patterns relate to PTSD and depression symptoms in civilians recently exposed to trauma, using data from 1618 participants over 12 weeks.
  • Three classes of substance use were identified: low, high, and increasing, with differences in PTSD and depression symptoms observed at baseline and throughout the study.
  • Results indicate that higher substance use correlates with more severe PTSD and depression symptoms, suggesting that understanding these patterns may help in timing treatment interventions.
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Racism in emergency medicine (EM) health care research is pervasive but often underrecognized. To understand the current state of research on racism in EM health care research, we developed a consensus working group on this topic, which concluded a year of work with a consensus-building session as part of the overall Society for Academic Emergency Medicine (SAEM) consensus conference on diversity, equity, and inclusion: "Developing a Research Agenda for Addressing Racism in Emergency Medicine," held on May 10, 2022. In this article, we report the development, details of preconference methods and preliminary results, and the final consensus of the Healthcare Research Working Group.

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