Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"pulmonary ventilation"”.
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Quantification of Pulmonary Ventilation using Hyperpolarized 3He Magnetic Resonance Imaging
… lung diseases including chronic obstructive pulmonary disease (COPD) and lung cancer are projected to have claimed the lives of more than 30,000 Canadians in 2010. The poor prognosis and lack of new treatment options for lung diseases associated with smoking are largely due to the inadequacy …
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Heart rate and oxygen consumption during the critical prenatal period in chicken embryos (Gallus gallus): Influence of light cues and the onset of pulmonary ventilation.
To examine if a rhythm can be entrained in either heart rate or oxygen consumption in late stage embryos (days 17-19.5) with light as a zeitgeber, chicken embryos were incubated in complete darkness (D:D) and 12:12 light:dark cycle (L:D). Light had no impact on oxygen consumption (390 µL …
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Cardiorespiratory responses to altered rider position with conventional and aerodynamic handlebars
… product (RPP) , oxygen consumption (V02), pulmonary ventilation (VI)' ventilatory equivalent (V1/V02), respiratory exchange ratio (RER), ratings of perceived exertion (RPE) , and total time to test termination (TT). These variables did not differ significantly between rider positions at …
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Hormonal and metabolic responses to opioid antagonism during dynamic exercise : influence of exercise intensity
… to exercise at either intensity, although pulmonary ventilation was modestly (7%) elevated in 90%-NAL. Thus, opiate antagonism prevents the decline in serum glucose seen in prolonged exercise without altering substrate oxidation, and with minimal influence on the pancreatic hormone …
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Aggiustamenti metabolici durante il recupero nell'Interval Training: studio in laboratorio e sul campo in atleti di mezzofondo e velocità prolungata
… uptake (VO2), carbon dioxide production (VCO2), pulmonary ventilation (Ve), by means a portable gas analyzer. The excess in carbon dioxide production (CO2excess) was also measured to test the hypothesis that a cardiac drift, that occurred during recovery between repetitions of interval training, …
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Physics-Based Computational Modeling of Mechanics and Perfusion in COVID-19 Infected Lungs
… lung in addition to multi-scale perfusion-ventilation models. A fully resolved model of the mesoscale lung is used to reconcile the range of reported mechanical properties for healthy lung mechanics across the meso- and microscale. Furthermore, a reduced dimensional approach is used to …
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Hyperpolarized Nuclei for NMR Imaging and Spectroscopy – Methodology and model studies of lung and vascular function
… (SNR) as high as ~500. To investigate regional pulmonary ventilation, a technique was developed in an initial study, that was based on inhalation of 3He gas. A quantitative measurement of gas replacement was calculated from the signal buildup after repeated inspirations of 3He. The relative …
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Valutazione degli effetti dell'esercizio fisico adattato sulla capacità fisica e sulla regolazione cardiocircolatoria in pazienti con sclerosi multipla
… joint mobility and stretching. Cardiopulmonary testing on a electromagnetically braked cycle-ergometer was used to assess maximum workload (Wmax), oxygen uptake (VO2max), carbon dioxide output (VCO2max), pulmonary ventilation (Vemax) and heart rate (HRmax). These parameters were …
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A Patient-Specific Multiscale Model of Mechanical Ventilation of COVID-19-afflicted Lungs
… of COVID-19 are often treated with mechanical ventilation, which has a high risk of causing ventilator-induced lung injury. However, COVID-19 is a relatively recent disease, and there is a lack of detailed understanding of its response to mechanical ventilation. This thesis aims to create a …
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Evaluation of Deformable Image Registration For Improved 4D Ct-Derived Ventilation For Image Guided Radiotherapy
… Guerrero et al. developed a method to calculate ventilation imaging from 4D CT, which is potentially better suited and more broadly available for IGRT than the current standard imaging methods. The key to extracting function information from 4D CT is the construction of a volumetric deformation …
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Improved Visualization and Quantification for Hyperpolarized 129Xe MRI
<p>In Pulmonary diseases, such as chronic obstructed pulmonary diseases (COPD), fibrosis, and asthma, are responsible for substantial health and financial burden in the world. In 2016, COPD claimed more than 3 million lives, which is also the 3rd leading cause of mortality. The treatment for …