Publications by authors named "Mathis M"

Background: Racial discrimination is associated with health disparities among Black Americans, a group that has experienced an increase in rates of fatal drug overdose. Prior research has found that racial discrimination in the medical setting may be a barrier to addiction treatment. Nevertheless, it is unknown how experiences of racial discrimination might impact engagement with emergency medical services for accidental drug overdose.

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Background: Safety in cardiac surgical procedures is predicated on effective team dynamics. This study associated operative team familiarity (ie, the extent of clinical collaboration among surgical team members) with procedural efficiency and Society of Thoracic Surgeons (STS) adjudicated patient outcomes.

Methods: Institutional STS adult cardiac surgery registry and electronic health record data from 2014 to 2021 were evaluated across 3 quaternary hospitals.

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Social insects offer powerful models to investigate the mechanistic foundation of elaborate individual behaviors comprising a cooperative community. Workers of the leafcutter ant genus provide an extreme example of behavioral segregation among many phenotypically distinct worker types. We utilize the complex worker system of to test the molecular underpinnings of behavioral programming and, in particular, the extent of plasticity to reprogramming.

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In this review, the authors define acute kidney injury in the perioperative setting, describe the epidemiologic burden, discuss procedure-specific risk factors, detail principles of management, and highlight areas of ongoing controversy and research.

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  • Burn injuries are a significant cause of morbidity and mortality in children, with non-accidental injuries showing higher mortality rates.
  • The study analyzed data from over 16,000 pediatric patients in burn centers across the U.S. to identify factors associated with non-accidental burns, finding that 7.4% of cases were non-accidental, predominantly affecting younger non-white children with scald burns.
  • Results indicated that risk factors for non-accidental burns include younger age, Black race, specific types of burns, and insurance status, contributing to a 0.5% overall mortality rate, helping inform care and expectations for affected families.
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A central principle in neuroscience is that neurons within the brain act in concert to produce perception, cognition, and adaptive behavior. Neurons are organized into specialized brain areas, dedicated to different functions to varying extents, and their function relies on distributed circuits to continuously encode relevant environmental and body-state features, enabling other areas to decode (interpret) these representations for computing meaningful decisions and executing precise movements. Thus, the distributed brain can be thought of as a series of computations that act to encode and decode information.

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  • Accurate diagnosis of heart failure (HF) before noncardiac surgery is difficult but important for patient outcomes.
  • A study of 1018 surgical patients revealed that those with a correct HF diagnosis received significantly less intraoperative fluid and had a reduced risk of postoperative acute kidney injury compared to those misdiagnosed.
  • Improving preoperative HF diagnostic accuracy could lead to better surgical results and fewer complications for patients undergoing major surgeries.
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  • - The study focuses on the molecular characteristics of non-tuberculous mycobacteria (NTM) that can cause infections outside of the lungs, detailing a collection of 45 extrapulmonary isolates over a span of six months from various sites.
  • - Key findings revealed that the most frequently isolated species were Mycobacterium avium, Mycobacterium chelonae, and Mycobacterium fortuitum, with significant variations in sequence types and the presence of antimicrobial resistance genes in some isolates.
  • - The research emphasizes the need for ongoing surveillance to monitor the prevalence and resistance patterns of NTM, helping to identify emerging strains and improve understanding of their virulence factors.
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Background: Thoracic surgery and one-lung ventilation in young children carry significant risks. Approaches to one-lung ventilation in young children include endobronchial intubation (mainstem intubation) and use of a bronchial blocker. We hypothesized that endobronchial intubation is associated with a greater prevalence of airway complications compared to use of a bronchial blocker.

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  • The study examines the relationship between high levels of inspired oxygen fraction during one-lung ventilation in thoracic surgery and the incidence of postoperative pulmonary complications (PPCs).
  • It analyzes data from over 2,700 surgeries across four US medical centers, finding that 5.2% of procedures resulted in PPCs, with some association between higher inspired oxygen and these complications.
  • Ultimately, the results suggest that limiting oxygen levels to prevent PPCs may not be necessary, as the duration of one-lung ventilation appears to be a more significant risk factor.
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  • - The study investigates the role of genetics in postoperative nausea and vomiting (PONV), which impacts patient satisfaction and results in unplanned hospital admissions after surgery, hypothesizing that genetic factors might explain some of the variability in risk that traditional factors do not cover.
  • - Researchers conducted a genome-wide association study using data from patients at Michigan Medicine and Vanderbilt University Medical Center, identifying 46 genetic variants associated with PONV and developing a polygenic risk score to better predict occurrences in different patient cohorts.
  • - Findings showed that higher polygenic risk scores corresponded with increased risk for developing PONV, suggesting that genetic predisposition combined with known clinical risks can improve understanding and prediction of this complication in surgical patients.
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Background: Acute myocardial infarctions are deadly to patients and burdensome to healthcare systems. Most recorded infarctions are patients' first, occur out of the hospital, and often are not accompanied by cardiac comorbidities. The clinical manifestations of the underlying pathophysiology leading to an infarction are not fully understood and little effort exists to use explainable machine learning to learn predictive clinical phenotypes before hospitalization is needed.

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  • The study explores variations in opioid use during cardiac surgeries across 30 hospitals and analyzes the influence of institutions and anesthesiologists on opioid doses.
  • Data from nearly 60,000 surgeries revealed a wide range in opioid doses, averaging 1139 mcg of fentanyl equivalents, with anesthesiologists showing significant differences in their prescribing practices.
  • Although high doses of opioids are still common, the findings highlight a shift towards understanding the factors contributing to dosage variability and the potential for implementing multimodal analgesia techniques.
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Keypoint tracking algorithms can flexibly quantify animal movement from videos obtained in a wide variety of settings. However, it remains unclear how to parse continuous keypoint data into discrete actions. This challenge is particularly acute because keypoint data are susceptible to high-frequency jitter that clustering algorithms can mistake for transitions between actions.

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Quantification of behavior is critical in diverse applications from neuroscience, veterinary medicine to animal conservation. A common key step for behavioral analysis is first extracting relevant keypoints on animals, known as pose estimation. However, reliable inference of poses currently requires domain knowledge and manual labeling effort to build supervised models.

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Objectives: To estimate whether the association of transfusion and acute kidney injury (AKI) has a threshold of oxygen delivery below which transfusion is beneficial but above which it is harmful.

Design: Retrospective study SETTING: Cardiovascular operating room and intensive care unit PARTICIPANTS: Patients undergoing cardiac surgery with continuous oxygen delivery monitoring during cardiopulmonary bypass INTERVENTIONS: None MEASUREMENTS AND MAIN RESULTS: Logistic regression was used to estimate the associations between oxygen delivery (mean, cumulative deficit, and bands of oxygen delivery), transfusion, and their interaction and AKI. A subgroup analysis of transfused and nontransfused patients with exact matching on cumulative oxygen deficit and time on bypass with adjustment for propensity to receive a transfusion using logistic regression.

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Background: Accurate projections of procedural case durations are complex but critical to the planning of perioperative staffing, operating room resources, and patient communication. Nonlinear prediction models using machine learning methods may provide opportunities for hospitals to improve upon current estimates of procedure duration.

Objective: The aim of this study was to determine whether a machine learning algorithm scalable across multiple centers could make estimations of case duration within a tolerance limit because there are substantial resources required for operating room functioning that relate to case duration.

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Purpose: To explore the patterns of anesthesia use and their determinants during vitreoretinal (VR) surgeries in academic and community hospitals across the US, using data from the Multicenter Perioperative Outcomes Group (MPOG).

Design: A retrospective, multicenter, cohort study.

Methods: We queried the MPOG database of 107,066 patients undergoing VR surgeries.

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Previous literature has focused on either individual models of supervision, developing trainees' interprofessional competencies, or on developing and maintaining interprofessional relationships outside of training. For psychologists in medical settings, these concepts are inextricably linked, and supervision must combine these professional practices to successfully meet the needs of psychology trainees, patients, and interprofessional colleagues, in an increasingly integrated healthcare landscape. This paper presents a model for advancing interprofessional collaborative practice competencies in supervision as health psychology trainees progress through the developmental stages of clinical competency, while supervising psychologists also maintain interprofessional relationships.

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Background: The quest to comprehend the real-world efficacy of CDK4/6 inhibitors (CDKis) in breast cancer continues, as patient responses vary significantly.

Methods: This single-center retrospective study evaluated CDKi use outside the trial condition from November 2016 to May 2020. Progression-free survival (PFS), time-to-treatment failure (TTF), short-term and prolonged treatment benefit (≥4 and ≥10 months), as well as prognostic and predictive markers were assessed with Kaplan-Meier and multivariate regression analyses.

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Studying the intricacies of individual subjects' moods and cognitive processing over extended periods of time presents a formidable challenge in medicine. While much of systems neuroscience appropriately focuses on the link between neural circuit functions and well-constrained behaviors over short timescales (e.g.

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  • The study examined the effects of perchlorate (ClO) and nitrate (NO) on the metamorphosis of Xenopus laevis larvae by exposing them to various concentrations over 32 days.
  • Significant developmental delays and thyroid issues were noted at higher concentrations of perchlorate, with the no observed effect concentrations being 25.0 μg/L for development and 3125 μg/L for growth.
  • In contrast, while nitrate exposure did not harm metamorphosis or growth, it showed a decreasing trend in developmental stage distribution at higher concentrations, indicating different impacts compared to perchlorate.
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Artificial intelligence- (AI) and machine learning (ML)-based applications are becoming increasingly pervasive in the healthcare setting. This has in turn challenged clinicians, hospital administrators, and health policymakers to understand such technologies and develop frameworks for safe and sustained clinical implementation. Within cardiac anesthesiology, challenges and opportunities for AI/ML to support patient care are presented by the vast amounts of electronic health data, which are collected rapidly, interpreted, and acted upon within the periprocedural area.

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Delays in the identification of acute kidney injury (AKI) in hospitalized patients are a major barrier to the development of effective interventions to treat AKI. A recent study by Tomasev and colleagues at DeepMind described a model that achieved a state-of-the-art performance in predicting AKI up to 48 hours in advance. Because this model was trained in a population of US Veterans that was 94% male, questions have arisen about its reproducibility and generalizability.

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