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 20 of 95 for “"microcirculation"”.
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The Microcirculation in Trauma and Sepsis
The microcirculation plays a vital part for fluid-, gas- and solute-exchange, and changes in permeability during trauma or sepsis, that are in part necessary for the natural healing process, may also cause hypovolemia and edema formation, leading to disturbances in microvascular exchange. This …
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Image Processing Algorithms for Diagnostic Analysis of Microcirculation
Microcirculation has become a key factor for the study and assessment of tissue perfusion and oxygenation. Detection and assessment of the microvasculature using videomicroscopy from the oral mucosa provides a metric on the density of blood vessels in each single frame. Information pertaining to …
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FLUID FILTRATION FROM CAPILLARY NETWORKS (MICROCIRCULATION, MATHEMATICAL MODELING).
A mathematical model has been developed which describes the fluid exchange from a capillary network of realistic topology, and calculates the spatial distribution of extravascular pressure. In this model, the capillaries are represented by a superposition of sources and sinks, resulting from a …
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In Vivo Fluorometric Assessment of the Skin Microcirculation
A tissue uptake model was developed to describe the fluorescein dermofluorometer signal in terms of the local blood flow and capillary permeability. The fluorescein signal is characterized by a wash-in time constant dependent on both the blood flow and permeability. Under flow-limited conditions …
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A perturbation model for normal and sickle cell blood microcirculation
… computational models have been used to study the microcirculation to gain a better understanding of blood disorders such as sickle cell disease. A fast, time efficient computational model has been developed to analyze perturbations in the microcirculation caused by sickle cell disease. The model …
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Development of a two-dimensional model of blood microcirculation flows
… the development of a dimensionless blood microcirculation model for the study of blood microcirculation flows. It is a two dimensional, axially symmetric, incompressible, Newtonian-flow, Krogh cylinder model subjected to axially periodic boundary conditions. This model formulation allows …
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A Hierarchical Image Processing Approach for Diagnostic Analysis of Microcirculation Videos
… to determine quantitative features of microcirculation, either automatically or accurately. In particular, microvessel density has been a critical diagnostic measure in evaluating disease progression and a prognostic indicator in various clinical conditions. As a result, automated …
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A study on the resistances to oxygen transport in the microcirculation
… on the resistances to oxygen transport in the microcirculation has been conducted. In Part I of this work, the oxygen permeability of cultured bovine aortic and human umbilical vein endothelial cell monolayers was measured directly in vitro. The monolayers were cultured on silicone rubber …
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Effects of vagal stimulation on the pulmonary microcirculation of rabbit, dog, and cat
Thesis (M.S.)--Michigan State University. Dept. of Anatomy, 1970
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Nonlinear Dynamics of Microcirculation and Energy Metabolism for the Prediction of Cardiovascular Risk
The peripheral skin microcirculation reflects the overall health status of the cardiovascular system and can be examined non-invasively by laser methods to assess early cardiovascular disease (CVD) risk factors, i.e. oxidative stress and endothelial dysfunction. Examples of methods used for this …
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Integrated modulation of sympathetic tone in the microcirculation by oxygen, adenosine, and nitric oxide
Despite a profound reduction in hemodynamic shear stress, a sustained release of endothelium-derived nitric oxide (NO) limits arteriolar constriction during periods of increased sympathetic nerve activity in the rat small intestine. In this project, we sought to test the hypothesis that adenosine, …
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Evaluation of the microcirculation of the equine small intestine following intramural distention and reperfusion
The effects of intraluminal distention (25 cm H₂O, 120 minutes) and subsequent decompression (60 minutes) on the intramural vascular patterns of the equine small intestine was evaluated in 7 anesthetized horses. The vascular system of experimental and control segments were injected with a …
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The effects of bradykinin and angiotensin II on the thoracic aorta vasa sasorum microcirculation system
… They can also change the permeability of microcirculation. In the present study, we documented the effect of different concentrations of ANG II and bradykinin on the vasa vasorum of isolated rabbit throcic aorta in vitro. Using a camera system, we observed changes in the number of leakages …
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Design of a numerical model for simulation of blood microcirculation and study of sickle cell disease
Sickle cell disease is nowadays one of the most challenging blood diseases, where patients suffer from both chronic and acute episodes of painful medical conditions. In particular, unpredictable crises due to blood vessel occlusion remain one of the least understood stages of the disease, which …
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Ray Tracing Confirms the Optical Properties of the Bovine Lens Are Actively Maintained by the Microcirculation System
… ocular lens, are actively maintained by the lens microcirculation system. Based on a series of experiments the MVL have proposed that monitoring the optical properties of lens could serve as a good indicator at the whole tissue level of the underlying state of the cellular physiology of the lens. …
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Altered Hemodynamic Control in the Skeletal Muscle Microcirculation in the Metabolic Syndrome: The Emergence of a new Attractor
Peripheral vascular disease is a pathological disease state whereby the peripheral vascular system becomes progressively limited in its ability to adequately perfuse extremities despite increases in metabolic demand. One of the primary risk factors for development of peripheral disease is the …
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The Effects of Hemoglobin-Based Oxygen Carriers On Mean Arterial Pressure, Arteriolar Diameter, and Nitric Oxide in the Microcirculation
… diameter, and nitric oxide levels in the microcirculation were investigated, using Oxyglobin (HBOC-301), a third generation glutaraldehyde-polymerized bovine hemoglobin. The spinotrapezius muscle of female Sprague-Dawley rats was exteriorized for microcirculatory observations. HBOC in …
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Full Field Laser Perfusion Imaging and Post Occlusive Reactive Hyperaemia in the Skin Microcirculation: A Biomarker of Cardiovascular Disease Risk?
… dynamic changes in blood flow of the skin microcirculation. Endothelial dysfunction is the earliest detectable functional indicator of cardiovascular disease (CVD), contributing to the development of atherosclerosis. Assessment of endothelial function provides a powerful method to identify …
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Effekte stromafreier Hämoglobinlösungen auf die Mikrozirkulation im quergestreiften Rückenhautmuskel beim Hamster
Effects of stroma free hemoglobin solutions on microcirculation in the striated dorsal skin muscle of the hamster: Since ischemia and hypoxia lead to cellular necrosis by failure of microvascular perfusion, oxygen delivery to the tissue is crucial for survival of the organism. For decades there was …
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