Publications by authors named "Rodney Bell"

Background/purpose: Inherited thrombophilia testing in the acute inpatient setting is controversial and expensive, and rarely changes clinical management. We evaluated ordering patterns and results of inpatient inherited thrombophilia testing for patients who presented with an isolated acute ischemic stroke or transient ischemic attack (TIA) without concurrent venous thromboembolism.

Methods: We retrospectively analyzed patients admitted for acute ischemic stroke or TIA between January 1, 2019 and December 31, 2021 at Thomas Jefferson University Hospitals in Philadelphia, PA and who underwent inherited thrombophilia testing during the hospital admission.

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Background: Data suggest that elderly patients have less favorable outcomes after ischemic stroke.

Objective: To study the outcomes after intravenous tissue plasminogen activator (tPA) administration in elderly patients with acute ischemic stroke.

Methods: Cross-sectional study using prospective collected patient data maintained via our "tele-stroke" network, which provides acute care in 29 community hospitals within our region from 2013-2015.

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Objective. Stroke is a clinical diagnosis, with a history and physical examination significant for acute onset focal neurological symptoms and signs, often occurring in patients with known vascular risk factors and is frequently confirmed radiographically. Case Report.

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Objective: Recently, the FDA guidelines regarding the eligibility of patients with acute ischemic stroke to receive IV rt-PA have been modified and are not in complete accord with the latest AHA/ASA guidelines. The resultant differences may result in discrepancies in patient selection for intravenous thrombolysis.

Methods: Several comprehensive stroke centers in the state of Pennsylvania have undertaken a collaborative effort to clarify and unify our own recommendations regarding how to reconcile these different guidelines.

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The evolution of imaging techniques and their increased use in clinical practice have led to a higher detection rate of unruptured intracranial aneurysms. The diagnosis of an unruptured intracranial aneurysm is a source of significant stress to the patient because of the concerns for aneurysmal rupture, which is associated with substantial rates of morbidity and mortality. Therefore, it is important that decisions regarding optimum management are made based on the comparison of the risk of aneurysmal rupture with the risk associated with intervention.

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There has been increased detection of incidental AVMs as result of the frequent use of advanced imaging techniques. The natural history of AVM is poorly understood and its management is controversial. This review provides an overview of the epidemiology, pathophysiology, natural history, clinical presentation, diagnosis, and management of AVMs.

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Objectives: To determine the association between myocardial infarction (AMI) and clinical outcome in patients with primary admissions diagnosis of acute cerebral ischemia (ACI) in the US.

Methods: Data from Nationwide Inpatient Sample (NIS) was queried from 2002-2011 for inpatient admissions of patients with a primary diagnosis of ACI with and without AMI using International Classification of Diseases, Ninth Revision, Clinical Modification coding (ICD-9). A multivariate stepwise regression analysis was performed to assess the correlation between identifiable risk factors and clinical outcomes.

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Introduction: Subdural hematoma (SDH) is a well described risk factor in the development of Status Epilepticus (SE), however the epidemiology of SE after SDH is unknown. In this study, we sought to determine the epidemiology of SE, the prevalence of risk factors, and impact on hospital mortality using a large administrative dataset.

Methods: Data was derived from the Nationwide Inpatient Sample from 1988 through 2011.

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Previously, we demonstrated that for H1N1 and H5N1 influenza strains, the globular head of the hemagglutinin (HA) antigen fused to flagellin of Salmonella typhimurium fljB (STF2) is highly immunogenic in preclinical models and man (Song et al. (2008) [13]; Song et al. (2009) [14]; Taylor et al.

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Background: Right-to-left vascular shunts are associated with brain abscess.

Case Report: We present a 47-year-old female with a cryptogenic left thalamic abscess on which Streptococcus mitis grew upon aspiration. Computed tomography of the chest with contrast agent revealed an anomalous connection between the left superior pulmonary and brachiocephalic veins.

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Rationale: Intracerebral hemorrhage causes 15% of strokes annually in the United States, and there is currently no effective therapy.

Aims And Hypothesis: This is a clinical trial designed to study the safety, feasibility, and efficacy of a protocol of targeted temperature management to moderate hypothermia in intracerebral hemorrhage patients.

Methods: The targeted temperature management after intracerebral hemorrhage trial is a prospective, single-center, interventional, randomized, parallel, two-arm (1:1) phase-II clinical trial with blinded end-point ascertainment.

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Objective: To test the hypothesis that hyperoxia was associated with higher in-hospital mortality in ventilated stroke patients admitted to the ICU.

Design: Retrospective multicenter cohort study.

Setting: Primary admissions of ventilated stroke patients with acute ischemic stroke, subarachnoid hemorrhage, and intracerebral hemorrhage who had arterial blood gases within 24 hours of admission to the ICU at 84 U.

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Objective: To determine the prevalence of status epilepticus, associated factors, and relationship with in-hospital mortality in primary admissions of septic patients in the United States.

Design: Cross-sectional study.

Setting: Primary admissions of adult patients more than 18 years old with a diagnosis of sepsis and status epilepticus from 1988 to 2008 identified through the Nationwide Inpatient Sample.

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Purpose: To determine the epidemiology of the acute respiratory distress syndrome (ARDS) and impact on in-hospital mortality in admissions of patients with acute ischemic stroke (AIS) in the United States.

Methods: Retrospective cohort study of admissions with a diagnosis of AIS and ARDS from 1994 to 2008 identified through the Nationwide Inpatient Sample.

Results: During the 15-year study period, we found 55 58 091 admissions of patients with AIS.

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Membranous nephropathy (MN) is one of the most common causes of nephrotic syndrome (NS) in adults. It may be primary, usually mediated by IgG4 anti-phospholipase A2 autoantibodies or secondary to various other conditions. Guillain- Barré syndrome (GBS) has been associated with MN, but a cause and effect relation has not been proven.

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Article Synopsis
  • Red blood cell transfusion (RBCT) may elevate the risk of thrombotic events in patients with subarachnoid hemorrhage due to both storage changes and increased clotting tendencies from the hemorrhage itself.
  • A study of 205 patients found that those who received RBCT had a significantly higher occurrence of thrombotic complications compared to non-transfused patients, suggesting a strong link between transfusions and increased risks.
  • Results indicated that each unit of blood transfused raised the risk of thrombotic events by 55%, but the age of the transfused blood did not influence this risk.
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Background: As part of the development of the Neurocritical Care Society (NCS) Status Epilepticus (SE) Guidelines, the NCS SE Writing Committee conducted an international survey of SE experts.

Methods: The survey consisted of three patient vignettes (case 1, an adult; case 2, an adolescent; case 3, a child) and questions regarding treatment. The questions for each case focused on initial and sequential therapy as well as when to use continuous intravenous (cIV) therapy and for what duration.

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Background: Traumatic brain injury (TBI) is a major cause of disability, morbidity, and mortality. The effect of the acute respiratory distress syndrome and acute lung injury (ARDS/ALI) on in-hospital mortality after TBI remains controversial.

Objective: To determine the epidemiology of ARDS/ALI, the prevalence of risk factors, and impact on in-hospital mortality after TBI in the United States.

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Status epilepticus (SE) treatment strategies vary substantially from one institution to another due to the lack of data to support one treatment over another. To provide guidance for the acute treatment of SE in critically ill patients, the Neurocritical Care Society organized a writing committee to evaluate the literature and develop an evidence-based and expert consensus practice guideline. Literature searches were conducted using PubMed and studies meeting the criteria established by the writing committee were evaluated.

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Objective: To evaluate the effectiveness of medical schools and neurology training programs in the United States by determining their contribution to academic neurology in terms of how many graduates choose academic careers and their respective influence on current medical knowledge through bibliometric analysis.

Design, Setting, And Participants: Biographical information from current faculty members of neurology training programs in the United States was obtained through an Internet-based search of departmental Web sites. Collected variables included medical school attended, residency program completed, and current academic rank.

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It is known that physical linkage of TLR ligands and vaccine antigens significantly enhances the immunopotency of the linked antigens. We have used this approach to generate novel influenza vaccines that fuse the globular head domain of the protective hemagglutinin (HA) antigen with the potent TLR5 ligand, flagellin. These fusion proteins are efficiently expressed in standard E.

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Introduction: The objective of this study is to show the effectiveness of Factor IX complex concentrate (FIXCC) for rapid reversal of an elevated International Normalized Ratio (INR) in patients with anticoagulation-associated intracerebral hemorrhage (AAICH).

Methods: We, retrospectively, analyzed the clinical data of 19 patients with the diagnosis of AAICH from January 2005 to May 2006. A comparison was made among patients treated with FFP and Vit.

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The National Institute of Neurological Disorders and Stroke trial of recombinant tissue plasminogen activator has been considered a landmark study in the acute treatment of ischemic stroke. Unfortunately, only a small percentage of all ischemic stroke patients presents to the hospital in time to receive the drug. Moreover, the recannalization rate of a major artery occlusion, such as the proximal middle cerebral artery or top of the internal carotid artery occlusion, after intravenous (IV) thrombolytic therapy has been disappointingly low.

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Introduction: Effective treatment for severe ischemic stroke continues to be largely an unmet medical need. Using a nonvascular (paravascular cerebrospinal fluid) pathway to provide oxygen and nutrients to ischemic tissues may be a means of treating this disease. The primary objective of this study was to evaluate the safety and technical feasibility of ventriculo-lumbar perfusion with the oxygenated fluorocarbon nutrient emulsion (OFNE) perfusion system in the treatment of patients with severe hemispheric cerebral ischemia.

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