Teaching NeuroImages: Intracranial vertebral dissection in a 15-year-old boy with sickle cell disease

A 15-year-old boy with sickle cell disease became unresponsive after sudden-onset headache. There was no antecedent trauma. A head CT scan demonstrated subarachnoid hemorrhage at the medulla (figure). Magnetic resonance angiography of the head and neck identified the patient's known bilateral internal carotid artery stenosis (a moyamoya-like arteriopathy associated with stroke in sickle cell disease) and a new right vertebral artery dissection, which was confirmed on conventional angiography (figure). Prior MRI performed as part of routine cerebral monitoring did not reveal any preexisting abnormality of the vertebral artery.
Source: Neurology - Category: Neurology Authors: Tags: Pediatric stroke; see Cerebrovascular Disease/ Childhood stroke RESIDENT AND FELLOW SECTION Source Type: research

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Authors: Atzema CL, Jackevicius CA, Chong A, Dorian P, Ivers NM, Parkash R, Austin PC Abstract BACKGROUND: Patients with atrial fibrillation frequently seek emergency care. Rates of guideline-concordant oral anticoagulant therapy for stroke prevention are suboptimal in the community. We assessed the association between prescribing of oral anticoagulants in the emergency department (relative to referral to a longitudinal care provider for treatment initiation) and long-term use of oral anticoagulants. METHODS: This retrospective cohort study performed at 15 hospitals in Ontario, Canada, involved patients aged 65...
Source: Canadian Medical Association Journal - Category: General Medicine Tags: CMAJ Source Type: research
In this study, the effects of the addition of various polysaccharides (konjac gum, gellan gum, and curdlan gum) on the rheological and textural properties of calcium sulfate-induced soy protein isolate gels were investigated. The incorporation of konjac gum and curdlan gum at 0.3 and 0.5% (w/v) concentrations and gellan gum at 0.5% concentration significantly enhanced (P 
Source: Food Chemistry - Category: Food Science Source Type: research
CONCLUSIONS: HVLF and EDS produced a deep intranasal/intrasinal deposition in the silicone cast compared with conventional nasal spray delivery; both deposited liquid inside the surgically opened sinuses. HVLF offers the benefit of lavage, whereas EDS may be more efficient and convenient. PMID: 31813944 [PubMed - as supplied by publisher]
Source: Rhinology - Category: ENT & OMF Tags: Rhinology Source Type: research
Diagnostic accuracy of troponin T measured ≥6h after symptom onset for ruling out myocardial infarction. Scand Cardiovasc J. 2019 Dec 09;:1-9 Authors: Khoshnood A, Erlandsson M, Isma N, Yndigegn T, Mokhtari A Abstract Objectives: Guidelines recommend a single high-sensitivity cardiac troponin T (hs-cTnT) ≤14 ng/L measured ≥6 h after chest pain onset combined with a GRACE score
Source: Scandinavian Cardiovascular Journal - Category: Cardiology Tags: Scand Cardiovasc J Source Type: research
Publication date: Available online 11 December 2019Source: Results in PhysicsAuthor(s): Biao Zheng, Cheng Zhang, Chunlei Huang, Jinquan Hong, Yuliang Li, Jun Wang, Lin Lin, Zhiqiang ZhengAbstractMultifunctional NiO@Gd2O3:Er3+,Yb3+ hollow nanocomposites (NCs) with mesoporous, upconversion (UC) luminescent and magnetic properties are synthesized by a facile hydrothermal process. Transmission electron microscope (TEM) and scanning electron microscope (SEM) images reveal that the samples have hollow structures with double shells of UC layer and magnetic layer. N2 adsorption/ desorption isotherm analysis shows the samples have ...
Source: Results in Physics - Category: Physics Source Type: research
In conclusion, we believe that our approach can significantly contribute to CT study and application.
Source: Radiation Physics and Chemistry - Category: Physics Source Type: research
Publication date: Available online 6 December 2019Source: Radiation Physics and ChemistryAuthor(s): Bo Gao, Brecht Laforce, Jelle Dhaene, Laszlo Vincze, Luc Van Hoorebeke, Matthieu N. BooneAbstractX-ray Fluorescence Computed Tomography (XFCT) is an emerging imaging technique that provides elemental distribution in objects non-invasively. To predict and optimize the experimental outcome of XFCT, data generated by Monte Carlo (MC) simulation is usually used. However, MC codes typically require extended computing times to generate sufficient data. In this paper, we report an XFCT simulation method based on analytical computat...
Source: Radiation Physics and Chemistry - Category: Physics Source Type: research
Publication date: Available online 10 December 2019Source: Journal of Physics and Chemistry of SolidsAuthor(s): İbrahim Yılmaz, Ali Gelir, Onder Yargi, Utkan Sahinturk, Oguz Kaan OzdemirAbstractElectrochemical properties of porous nickel (Ni) foam, electrodeposited zinc (Zn) on Ni foam (Ni–Zn) and electrodeposited reduced graphene oxide (rGO) on Ni–Zn foam electrodes (Ni–Zn-rGO) in 6 M KOH electrolyte were investigated. Cyclic voltammetry (CV) and galvanostatic charge–discharge cycling (GCD) techniques were used to carry out the redox interactions, and cycling capacitive properties of the electr...
Source: Journal of Physics and Chemistry of Solids - Category: Physics Source Type: research
In this study, AA loading PEGylated nanostructured lipid carriers (P-AA-NLC) were prepared. P-AA-NLC were characterized for particle size distribution, polydispersity index, entrapment efficiency, X-ray powder diffraction pattern (XRD), differential scanning colorimeter (DSC) and transmission electron microscopy (TEM). The intestinal absorption, in vivo distribution, pharmacokinetics and anti-fibrosis effects of P-AA-NLC were studied compared with that of AA-NLC. In situ single-pass intestinal perfusion model shown that there are significant differences in absorption between the free and NLCs formulation. The Peff values o...
Source: Drug Development and Industrial Pharmacy - Category: Drugs & Pharmacology Tags: Drug Dev Ind Pharm Source Type: research
CONCLUSIONS: The results have implications not only for understanding the stresses and strains within the ACL under different flexion angles, but also for providing preliminary data for the biomechanical and medical experts in regard of the injuries which may occur to the ACL at relatively higher flexion angles. PMID: 31815688 [PubMed - as supplied by publisher]
Source: Journal of Back and Musculoskeletal Rehabilitation - Category: Orthopaedics Tags: J Back Musculoskelet Rehabil Source Type: research
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