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Gastroesophageal Reflux in Infants and Children: Diagnosis and Treatment.
Am Fam Physician
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Duke University School of Medicine, Durham, N.C.
Gastroesophageal reflux is a common physiologic event in infants in which gastric contents pass from the stomach into the esophagus. Gastroesophageal reflux may be asymptomatic or cause regurgitation or "spit up." This occurs daily in approximately 40% of infants.
View Article and Find Full Text PDFEstablishing thresholds for swing transparency at the knee during gait to inform exoskeleton design.
PLoS One
January 2025
Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, United States of America.
Knee exoskeletons have been developed to assist, stabilize, or improve human movement or recovery. However, exoskeleton designers must implement transparency (i.e.
View Article and Find Full Text PDFElectrochemical and physical properties of magnesioferrite nanomaterial and photocatalytic degradation of methylene blue.
Sci Rep
January 2025
UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, South Africa.
This research successfully synthesized semiconductive magnesioferrite (MgFeO) nanomaterials using a green chemistry method that utilizes the natural extract of Moringa olefeira serving as both a reducing and oxidizing agent. The optical characteristics and crystalline structure of the MgFeO nanomaterials were analysed using photoluminescence, diffuse reflectance spectroscopy, and X-ray diffraction. Additionally, Fourier transform infrared spectroscopy provided valuable insights into the chemical bonding and composition.
View Article and Find Full Text PDFDistribution of airway pressure opening in the lungs measured with electrical impedance tomography (POET): a prospective physiological study.
Crit Care
January 2025
Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, ON, Canada.
Background: In patients with acute hypoxemic respiratory failure (AHRF) under mechanical ventilation, the change in pressure slope during a low-flow insufflation indicates a global airway opening pressure (AOP) needed to reopen closed airways and may be used for titration of positive end-expiratory pressure.
Objectives: To understand 1) if airways open homogeneously inside the lungs or significant regional AOP variations exist; 2) whether the pattern of the pressure slope change during low-flow insufflation can indicate the presence of regional AOP variations.
Methods: Using electrical impedance tomography, we recorded low-flow insufflation maneuvers (< 10 L/min) starting from end-expiratory positive pressure 0-5 cmHO.
Electrical Impedance Tomography meets Reduced Order Modelling: a framework for faster and more reliable electrical conductivity estimations.
J Neural Eng
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School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, CF10 3XQ, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
Objective: Inclusion of individualised electrical conductivities of head tissues is crucial for the accuracy of electrical source imaging techniques based on electro/magnetoencephalography and the efficacy of transcranial electrical stimulation. Parametric electrical impedance tomography (pEIT) is a method to cheaply and non-invasively estimate them using electrode arrays on the scalp to apply currents and measure the resulting potential distribution. Conductivities are then estimated by iteratively fitting a forward model to the measurements, incurring a prohibitive computational cost that is generally lowered at the expense of accuracy.
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