Publications by authors named "Matthew R Rosengart"

Background: Variations in light exposure are associated with changes in inflammation and coagulation. The impact of light spectra on venous thrombosis (VT) and arterial thrombosis is largely unexplored.

Objectives: To investigate the impact of altering light spectrum on platelet function in thrombosis.

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Background: Serial neurological examinations (NEs) are routinely recommended in the intensive care unit (ICU) within the first 24 hours following a traumatic brain injury (TBI). There are currently no widely accepted guidelines for the frequency of NEs. Disruptions to the sleep-wake cycles increase the delirium rate.

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Background: Evidence suggests that variation in light exposure strongly influences the dynamic of inflammation, coagulation, and the immune system. Multiple injuries induce systemic inflammation that can lead to end-organ injury. Here, we hypothesize that alterations in light exposure influence posttrauma inflammation, coagulopathy, and end-organ injury.

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Introduction: Diversity in the physician workforce improves patient-centred outcomes. Patients are more likely to trust in and comply with care when seeing gender/racially concordant providers. A current emphasis on standardised metrics in academic achievement often serves as a barrier to the recruitment and retention of gender and racial minorities in medicine.

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Background: Necrotizing soft tissue infections (NSTIs) are life-threatening infections. The aim of this study is to evaluate the safety of clindamycin plus vancomycin versus linezolid as empiric treatment of NSTIs.

Methods: This was a retrospective, single-center, quasi-experimental study of patients admitted from 1 June 2018 to 30 June 2019 (preintervention) and 1 May 2020 to 15 October 2021 (postintervention).

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Background: We sought to explore the impact of sex, race, and insurance status on operative management of incisional hernias.

Methods: A retrospective cohort study was conducted to explore adult patients diagnosed with an incisional hernia. Adjusted odds for non-operative versus operative management and time to repair were queried.

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Objective: Holistic review, which emphasizes qualitative attributes over objective measures, has been proposed as a method for selecting candidates for surgical residency in order to improve diversity in graduate medical education, and, ultimately, the field of surgery. This study seeks to articulate desirable traits of applicants as a first-step in standardizing the holistic review process.

Design: Using Group Concept Mapping, a web-based mixed-methods participatory research methodology, residency selection committee members were asked to 1) list desirable characteristics of applicants, 2) group these into categories, 3) rate their importance to academic/clinical success on a 5-point Likert scale (1 = not at all important, 5 = extremely important), and 4) rate the degree to which each characteristic is feasible to assess on a 3-point Likert scale (1 = not at all feasible, 3 = very feasible).

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Introduction: Unlike antibiotic and perfusion support, guidelines for sepsis source control lack high-quality evidence and are ungraded. Internally valid administrative data methods are needed to identify cases representing source control procedures to evaluate outcomes.

Methods: Over five modified Delphi rounds, two independent reviewers identified Current Procedural Terminology (CPT) codes pertinent to source control.

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Background: Severely injured patients are at particularly high risk for venous thromboembolism (VTE). Although thromboprophylaxis (PPX) is employed during the inpatient period, patients may continue to be at high risk after discharge. Comparative evidence from surgical subspecialities (eg oncology) reveals benefits of postdischarge (ie extended) PPX.

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Background: Professional burnout represents a significant threat to the American healthcare system. Organizational and individual factors may increase healthcare providers' susceptibility or resistance to burnout. We hypothesized that during the COVID-19 pandemic, 1) higher levels of perceived organizational support (POS) are associated with lower risk for burnout and anxiety, and 2) anxiety mediates the association between POS and burnout.

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Extremity threat and amputation after sepsis is a well-publicized and devastating event. However, there is a paucity of data about the epidemiology of extremity threat after sepsis onset. To estimate the incidence of extremity threat with or without surgical amputation in community sepsis.

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Importance: Although patients with emergency general surgery (EGS) conditions frequently undergo interhospital transfers, the transfer patterns and associated factors are not well understood.

Objective: To examine whether patients with EGS conditions are consistently directed to hospitals with more resources and better outcomes.

Design, Setting, And Participants: This cohort study performed a network analysis of interhospital transfers among adults with EGS conditions from January 1 to December 31, 2016.

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Article Synopsis
  • Physicians at non-trauma centers often under-triage severely injured patients, so two digital interventions were developed to improve their decision-making.
  • In a study involving 688 emergency medicine physicians, follow-up data was linked to Medicare claims to assess changes in their triage decisions before and after using the interventions.
  • Results showed that physicians who used the interventions had a significant reduction in under-triage rates for patients compared to before, while control group physicians showed no significant change, although overall differences were not statistically conclusive.
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Background: Emergency general surgery conditions are common, require urgent surgical evaluation, and are associated with high mortality and costs. Although appropriate interhospital transfers are critical to successful emergency general surgery care, the performance of emergency general surgery transfer systems remains unclear. We aimed to describe emergency general surgery transfer patterns and identify factors associated with potentially avoidable transfers.

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Background: Study of telemedicine and telerounding in surgical specialties is limited. The push for telemedicine during the COVID-19 pandemic has challenged the face-to-face rounding paradigm and creates an opportunity for reflection on the benefits of telemedicine, especially for balancing competing corporate and clinical demands.

Methods: The 117-month video-based inpatient telerounding experience of a colorectal surgeon in an academic medical system was recorded, including patient characteristics, diagnoses, technology, content of telerounding encounters, and logistical considerations.

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Chronic kidney disease (CKD) and acute kidney injury (AKI) are common, heterogeneous, and morbid diseases. Mechanistic characterization of CKD and AKI in patients may facilitate a precision-medicine approach to prevention, diagnosis, and treatment. The Kidney Precision Medicine Project aims to ethically and safely obtain kidney biopsies from participants with CKD or AKI, create a reference kidney atlas, and characterize disease subgroups to stratify patients based on molecular features of disease, clinical characteristics, and associated outcomes.

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Circadian rhythms regulate adaptive alterations in mammalian physiology and are maximally entrained by the short wavelength blue spectrum; cataracts block the transmission of light, particularly blue light. Cataract surgery is performed with two types of intraocular lenses (IOL): (1) conventional IOL that transmit the entire visible spectrum and (2) blue-light-filtering (BF) IOL that block the short wavelength blue spectrum. We hypothesized that the transmission properties of IOL are associated with long-term survival.

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Background: The significance of pneumatosis intestinalis (PI) remains challenging. While certain clinical scenarios are predictive of transmural ischemia, risk models to assess the presence of pathologic PI are needed. The aim of this study was to determine what patient factors at the time of radiographic diagnosis of PI predict the risk for pathologic PI.

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Article Synopsis
  • Tranexamic acid administration in injured patients is linked to improved outcomes related to hemorrhage when given in a hospital setting, but its prehospital effectiveness was unclear until this study.
  • This multicenter, double-blind trial assessed the safety and effectiveness of tranexamic acid in injured patients experiencing low blood pressure or high heart rates before reaching the hospital.
  • The study found no significant difference in 30-day mortality between those receiving tranexamic acid (8.1%) and those given a placebo (9.9%), indicating that while there was a slight reduction in mortality, it was not statistically significant.
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Article Synopsis
  • Macrophages play a crucial role in managing heme metabolism and increase in number during the breakdown of damaged red blood cells (RBCs) in the liver, which is linked to their immune function.
  • The study reveals that an increase in RBC disposal by macrophages during a pulmonary infection with Klebsiella pneumoniae leads to an immunosuppressive state, resulting in increased bacterial growth outside the lungs and poorer survival rates in infected mice.
  • This immunosuppression is related to a decrease in the STAT1 pathway and interferon responses, primarily influenced by the porphyrin component of heme, rather than by the iron it contains, indicating a complex relationship between heme metabolism and immune response during severe infections.
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Sepsis and shock states impose mitochondrial stress, and in response, adaptive mechanisms such as fission, fusion and mitophagy are induced to eliminate damaged portions of or entire dysfunctional mitochondria. The mechanisms underlying these events are being elucidated; yet a direct link between loss of mitochondrial membrane potential ΔΨm and the initiation of fission, fusion and mitophagy remains to be well characterized. The direct association between the magnitude of the ΔΨm and the capacity for mitochondria to buffer Ca renders Ca uniquely suited as the signal engaging these mechanisms in circumstances of mitochondrial stress that lower the ΔΨm.

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Background: Incisional hernia develops in up to 20% of patients undergoing abdominal operations. We sought to identify characteristics associated with poor outcomes after acute incisional hernia incarceration.

Study Design: We performed a retrospective cohort study of adult patients with incisional hernias undergoing elective repair or with acute incarceration between 2010 and 2017.

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