Publications by authors named "Schellenberg M"

Background: The extended focused assessment with sonography in trauma (eFAST) examination includes additional thoracic views beyond the standard focused assessment with sonography in trauma examination. Its validation has predominantly been conducted in blunt trauma cases. Our aim was to evaluate the eFAST examination in a targeted population with penetrating thoracic trauma.

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Peyssonnoside A is a marine-derived sulfated diterpenoid glucoside featuring a remarkable 5/6/3/6 tetracyclic skeleton with a highly substituted cyclopropane ring deeply embedded in its structure. Herein, we report on the full development of the first total synthesis of this natural product and its aglycon, peyssonnosol. Through the experimental evaluation of a series of synthetic strategies, including utilization of Ohloff-Rautenstrauch cycloisomerization and C-H allylation, we identified a concise, efficient, and highly diastereoselective route.

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The host-range mutant of rabbitpox virus (RPXV) with a deletion in the gene encoding the serpin serine protease inhibitor 1 (SPI-1) fails to replicate efficiently in restrictive host cells. Depletion of the host cell serine protease FAM111A restores viral replication in these cells, suggesting that SPI-1 targets FAM111A to facilitate infection. However, direct evidence of SPI-1 inhibiting FAM111A has been lacking.

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Dynamic contrast-enhanced (DCE) MRI is an important imaging tool for evaluating tumor vascularity that can lead to improved characterization of tumor extent and heterogeneity, and for early assessment of treatment response. However, clinical adoption of quantitative DCE-MRI remains limited due to challenges in acquisition and quantification performance, and lack of automated tools. This study presents an end-to-end deep learning pipeline that exploits a novel deep reconstruction network called DCE-Movienet with a previously developed deep quantification network called DCE-Qnet for fast and quantitative DCE-MRI.

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Background: For difficult cholecystectomies, bail out procedures (BOP) are performed to mitigate risk of patient harm.

Objective: This study sought to identify risk factors for BOP for acute cholecystitis and to compare outcomes by type of BOP performed. Patients with acute cholecystitis who underwent cholecystectomy were included (2020-2022).

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Background: Traumatic fibrinolytic dysfunction is often categorized into 3 phenotypes based on the result of thromboelastography (TEG) lysis at 30 minutes (LY30): fibrinolysis shutdown, physiologic fibrinolysis, and hyperfibrinolysis. However, the molecular pathophysiology of fibrinolytic dysfunction and the association with clinical outcomes have not been fully evaluated.

Objectives: To assess whether posttraumatic fibrinolysis phenotypes identified by TEG correlate with levels of key fibrinolysis-related serum markers and with risk of mortality and hospital complications.

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  • * Mutations in genes that encode deubiquitylating enzymes (DUBs) are linked to several NDDs, but the exact mechanisms of these disorders are not well understood yet.
  • * A new experimental method allows researchers to assess the enzymatic activity of DUBs, specifically using USP27X, a gene variant associated with a form of intellectual disability known as XLID105, helping to shed light on how these mutations affect neurodevelopment.
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  • The study examines the impact of illicit substance use during pregnancy, noting a 4-fold increase over two decades and its negative effects on mothers and fetuses.
  • A multicenter retrospective analysis from 2016 to 2021 included 852 pregnant trauma patients (PTPs), with 9.8% testing positive for substances, primarily THC and methamphetamine.
  • Findings showed that PTPs with positive urine toxicology had higher rates of blunt head injuries, extremity injuries, domestic violence incidents, and uterine contractions, but similar maternal complication rates compared to those who tested negative.
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In this review, we provide recommendations as well as summarize available data on the optimal time to initiate venous thromboembolism chemoprophylaxis after severe trauma. A general approach to the severe polytrauma patient is provided as well as in-depth reviews of three high-risk injury subgroups: patients with traumatic brain injury, solid organ injury, and pelvic fractures.

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Background: Resuscitation with cold-stored whole blood (WB) has outcome benefits, but benefits varied by patient sex is unknown. There are also concerns about alloimmunization risk for premenopausal females given WB, leading to some protocols excluding this cohort. We sought to analyze WB utilization, outcomes, and disparities by patient sex.

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  • Current guidelines suggest that patients with isolated sternal fractures (ISFs) and minor heart-related issues should undergo 24-hour telemetry monitoring, despite a single study indicating they might not need it.
  • A study conducted across 8 trauma centers reviewed ISF patients with minor ECG changes or troponin elevation and found that very few (1.6%) experienced significant blunt cardiac injury (BCI), and none had BCI diagnosed via echocardiogram.
  • The results imply that routine monitoring and echocardiography may not be necessary for ISF patients displaying minor ECG abnormalities and challenge existing medical protocols.
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Importance: The optimal treatment of acute uncomplicated appendicitis in older adults with frailty is not defined.

Objective: To examine outcomes associated with treatment strategies for acute uncomplicated appendicitis in older adults with or without frailty.

Design, Setting, And Participants: This retrospective cohort study used National Inpatient Sample data from adults 65 years or older with a diagnosis of uncomplicated appendicitis from January 1, 2016, to December 31, 2018.

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Background: To date there are no data on sex aspects evaluating outcomes of interventional pneumology (IP). Our aim was to investigate sex differences in transbronchial lung cryobiopsy (TBLC) outcomes in the diagnosis of interstitial lung disease (ILD).

Methods: All consecutive (TBLC)s performed for ILD evaluation between Nov 17 and Dec 21 at a tertiary referral center for ILDs and IP were analyzed.

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Introduction: The unhoused population is known to be at high risk for traumatic injury. However, there are scarce data regarding injury patterns and outcomes for this patient group. This study aims to investigate any differences in injury characteristics and hospital outcomes between unhoused and housed patients presenting with traumatic injuries.

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  • - The study focuses on penetrating cerebrovascular injuries (PCVI) and their management, analyzing data from a trauma registry over a decade to evaluate patient outcomes at a trauma center mainly managed by trauma surgeons.
  • - Among 54 patients analyzed, the in-hospital stroke rate was 17%, with a mortality rate of 26%. Different treatment methods showed varying outcomes in stroke and mortality rates: arterial repair had a 30% stroke rate, ligation or embolization had 0%, and temporary intravascular shunting had an alarming 80% stroke rate.
  • - The findings highlight significant differences in complications based on the type of intervention, emphasizing that arterial repair had the best outcomes, while ligation or embolization and temporary shunting
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  • The American College of Surgeons updated trauma guidelines in 2021 to enhance care for geriatric trauma patients, particularly in resource-limited settings.
  • Two safety net hospitals in Los Angeles implemented a strategy to meet these guidelines despite a shortage of geriatricians, enrolling all trauma patients aged 60 and above from August 2022 to April 2023 and focusing on frailty screening.
  • The study revealed no standardized methods for identifying high-risk geriatric patients initially, but by the end of the research, compliance for frailty screening improved dramatically from 37% to 81%, leading to a robust process for ensuring high-risk patients receive appropriate care.
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Intelligent systems in interventional healthcare depend on the reliable perception of the environment. In this context, photoacoustic tomography (PAT) has emerged as a non-invasive, functional imaging modality with great clinical potential. Current research focuses on converting the high-dimensional, not human-interpretable spectral data into the underlying functional information, specifically the blood oxygenation.

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Background: The abdominal seat belt sign (SBS) is associated with an increased risk of hollow viscus injury (HVI). Older age is associated with worse outcomes in trauma patients. Thus, older trauma patients ≥65 years of age (OTPs) may be at an increased risk of HVI with abdominal SBS.

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  • A study was conducted to compare the effects of low-titre whole blood (LTOWB) versus balanced component therapy (BCT) in patients with blunt and penetrating trauma.
  • The research found that patients with penetrating trauma who received LTOWB had significantly higher survival rates and better outcomes compared to those who received BCT.
  • While LTOWB improved survival in penetrating trauma, it was also linked to a higher incidence of acute kidney injury in both penetrating and blunt trauma groups.
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Bile duct injury (BDI) is one of the most severe complications during cholecystectomy. Early identification of risk factors for BDI may permit risk reduction strategies and inform patient consent. This study aimed to define patient, provider, and systemic factors associated with BDI; BDI incidence; and short-term outcomes of BDI after urgent cholecystectomy.

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