828 results match your criteria: "University of Southern California. Los Angeles[Affiliation]"

Background: Global emergency medicine (GEM) is situated at the intersection of global health and emergency medicine (EM), which is built upon a history of colonial systems and institutions that continue to reinforce inequities between high-income countries (HICs) and low- and middle-income countries (LMICs) today. These power imbalances yield disparities in GEM practice, research, and education.

Approach: The Global Emergency Medicine Academy (GEMA) of the Society for Academic Emergency Medicine formed the Decolonizing GEM Working Group in 2020, which now includes over 100 worldwide members.

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Background: The vasoconstrictor effects of angiotensin II via type 1 angiotensin II receptors in vascular smooth muscle cells are well established, but the direct effects of angiotensin II on vascular endothelial cells (VECs) in vivo and the mechanisms how VECs may mitigate angiotensin II-mediated vasoconstriction are not fully understood. The present study aimed to explore the molecular mechanisms and pathophysiological relevance of the direct actions of angiotensin II on VECs in kidney and brain microvessels in vivo.

Methods And Results: Changes in VEC intracellular calcium ([Ca]) and nitric oxide (NO) production were visualized by intravital multiphoton microscopy of cadherin 5-Salsa6f mice or the endothelial uptake of NO-sensitive dye 4-amino-5-methylamino-2',7'-difluorofluorescein diacetate, respectively.

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Background: We aimed to investigate the association of characteristics of lenticulostriate artery (LSA) morphology and parental atheromatous disease (PAD) with single subcortical infarction (SSI) and to explore whether the LSA morphology is correlated with proximal plaque features in asymptomatic PAD.

Methods And Results: Patients with acute SSI were prospectively enrolled and classified as large- and small-SSI groups. The clinical data and imaging features of LSA morphology (branches, length, dilation, and tortuosity) and middle cerebral artery plaques (normalized wall index, remodeling index, enhancement degree, and hyperintense plaques) were evaluated.

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Electrochemical conversion of CO to value-added products serves as an attractive method to store renewable energy as energy-dense fuels. Selectivity in this type of conversion can be limited, often leading to the formation of side products such as H. The activity of a cobalt phosphino-thiolate complex ([Co(triphos)(bdt)]) towards the selective reduction of CO to formate is explored in this report.

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Dens evaginatus (DE) presents a clinical conundrum due to its fragility and propensity to cause pulpal and periapical complications. Clinicians should heed the presence of DE during clinical examinations and avoid unnecessary intervention.

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Background: Despite its approval for acute ischemic stroke >25 years ago, intravenous thrombolysis (IVT) remains underused, with inequities by age, sex, race, ethnicity, and geography. Little is known about IVT rates by insurance status.

Methods And Results: We assessed temporal trends from 2002 to 2015 in IVT for acute ischemic stroke in the Nationwide Inpatient Sample using adjusted, surveyweighted logistic regression.

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Key Clinical Message: Struma ovarii (SO), is a rare and specialized ovarian teratoma. The treatment is controversial depending on the risk of recurrence and metastasis. Here a SO with papillary thyroid carcinoma is reported and the approach is thoroughly discussed.

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Objective: The shock index (SI), the ratio of heart rate to systolic blood pressure, is a clinical tool for assessing injury severity. Age-adjusted SI models may improve predictive value for injured children in the out-of-hospital setting. We sought to characterize the proportion of children in the prehospital setting with an abnormal SI using established criteria, describe the age-based distribution of SI among injured children, and determine prehospital interventions by SI.

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Abernethy malformation or congenital extrahepatic portosystemic shunt is an extremely rare condition whereby the portomesenteric blood drains into a systemic vein and bypasses the liver through a complete or partial shunt. Severe complications include hyperammonemia and encephalopathy, benign and malignant liver tumors, and hepatopulmonary syndrome. We describe a case where a female adult diagnosed with congenital extrahepatic portosystemic shunt subsequently developed focal nodular hyperplasia and then hepatocellular carcinoma.

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Background: Hidradenitis suppurativa (HS) is a debilitating chronic inflammatory skin condition that typically requires consistent care. Contributory factors to why patients with HS miss their clinic appointments have not been investigated.

Objectives: This article seeks to characterise reasons that HS patients do not keep their appointments and identify strategies to minimise no-show rates and improve delivery of care to HS patients.

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Article Synopsis
  • Subcutaneous tumors in the head and neck area can look similar to skin tumors that mix different cell types.* -
  • These tumors may be wrongly identified as pleomorphic adenomas, which are tumors from salivary glands.* -
  • Doctors should keep salivary mixed tumors in mind when diagnosing suspected skin tumors.*
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Noise within: Signal-to-noise enhancement via coherent wave amplification in the mammalian cochlea.

Phys Rev Res

January 2024

Auditory Research Center, Caruso Department of Otolaryngology, University of Southern California Los Angeles, Los Angeles, California 90033, USA.

The extraordinary sensitivity of the mammalian inner ear has captivated scientists for decades, largely due to the crucial role played by the outer hair cells (OHCs) and their unique electromotile properties. Typically arranged in three rows along the sensory epithelium, the OHCs work in concert via mechanisms collectively referred to as the "cochlear amplifier" to boost the cochlear response to faint sounds. While simplistic views attribute this enhancement solely to the OHC-based increase in cochlear gain, the inevitable presence of internal noise requires a more rigorous analysis.

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Objective: To examine the prevalence of cerumen impaction in a nationally representative sample of the US population and the association of cerumen impaction with sociodemographic factors, hearing loss, and tinnitus.

Methods: The cohort included 14,230 individuals aged ≥12 years who completed otoscopy and audiometry in NHANES (2005-2016). Cerumen impaction (partial/complete) was determined by otoscopy.

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Study on the Sodium-Doped Titania Interface-Type Memristor.

ACS Appl Mater Interfaces

April 2024

Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin 17104, Republic of Korea.

Article Synopsis
  • * Alkali ion-based interface-type memristors offer solutions with benefits such as self-rectifying resistive switching and reduced variation between devices and cycles.
  • * A new Pt/Na/TiO/Pt memristor was created, demonstrating stable performance and a reliable resistive switching mechanism, verified through theoretical simulations.
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Background: Burns is a disease of poverty, disproportionately affecting populations in low- and middle-income countries, where most of the injuries and the deaths caused by burns occurs. In Sub-Saharan Africa, it is estimated that one fifth of burn victims die from their injuries. Mortality prediction indexes are used to estimate outcomes after provided burn care, which has been used in burn services of high-income countries over the last 60 years.

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Objective: To understand the quality of informational Graves' disease (GD) videos on YouTube for treatment decision-making quality and inclusion of American Thyroid Association (ATA) treatment guidelines.

Study Design: Cross-sectional cohort.

Setting: Informational YouTube videos with subject matter "Graves' Disease treatment.

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Background: Individuals with Attention-Deficit/Hyperactivity Disorder (ADHD) face an elevated risk of criminal convictions compared to those without ADHD. However, understanding this link involves considering sex differences, coexisting psychiatric conditions, and unmeasured familial factors. This study aimed to explore the connection between ADHD and criminal convictions (both violent and non-violent) in males and females, while also assessing the impact of comorbid psychiatric disorders and familial factors.

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Background: Research and clinical practice rely heavily on caregiver-report measures, such as the Child Behavior Checklist 1.5-5 (CBCL/1.5-5), to gather information about early childhood behavior problems and to screen for child psychopathology.

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This study investigated management practices for Meniere's disease (MD) and their temporal trends from 2008 to 2022 within the TriNetX network database. Study cohort included adult patients (≥18 years) with the diagnosis of MD from TriNetX's multi-institutional medical records (n = 77,493). MD diagnosis and management were queried based on the international classification of diseases, tenth revision, current procedural terminology, and RXNorm codes.

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Background And Aims: Anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines have the potential to alter several biological systems concurrently with remolding the immune system, most of which are related to immunization, while some others are known as adverse effects. This review aims to explore the potential effects of vaccination on the oral microenvironment and classifies them as good, bad, or ugly, with a brief review of facial diseases following coronavirus disease 2019 (COVID-19) vaccination.

Methods: This study was a comprehensive review conducted through searching related articles in Medline, Scopus, and Google Scholar databases.

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Acute opioid overdose in pediatric patients.

J Am Coll Emerg Physicians Open

April 2024

Department of Emergency Medicine Prisma Health Greenville South Carolina USA.

Recent increases in pediatric and adolescent opioid fatalities mandate an urgent need for early consideration of possible opioid exposure and specific diagnostic and management strategies and interventions tailored to these unique populations. In contrast to adults, pediatric methods of exposure include accidental ingestions, prescription misuse, and household exposure. Early recognition, appropriate diagnostic evaluation, along with specialized treatment for opioid toxicity in this demographic are discussed.

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