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 19 of 19 for “"Lumen diameter"”.
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The effect of a cooling cuff and moist ice pack on radial artery blood flow and lumen diameter
Submitted in partial compliance with the requirements for the Master’s Degree in Technology: Chiropractic, Durban University of Technology, Durban, South Africa, 2015.
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Automatic Arterial Wall Detection and Diameter Tracking Using M-mode Ultrasound
… wall region and estimate systolic and diastolic lumen diameter of the artery is proposed using ultrasound radio-frequency signals acquired with a single ultrasound transducer in M-mode.Detection of the region containing the artery walls is obtained using a machine learning trained classifier. …
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Influence of site, clone, age, and growth rate on wood properties of three Populus X Euramericana clones
… height. Anatomical properties, including vessel lumen diameter, area and shape factor, number of vessels per unit area, fiber lumen diameter and area, fiber length, ray area, and cell wall area percent were measured by an image analyzer. Site, clone and/or their interaction significantly affected …
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Quantitative Analysis of Retinal Vascular Morphology and Dynamics Using Optical Coherence Tomography
… and quantifying wall thickness and lumen diameter. This dissertation addresses these challenges through two aims. The first involves development and validation of OCT methods for quantitative vascular analysis. We introduced depth-resolved vascular profile analysis for artery-vein …
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Assessment of catheter-manometer systems used for invasive blood pressure measurement
… on various parameters (catheter length, lumen diameter, fluid temperature and catheter material) were measured using an hydraulic pressure generator. The design and construction details of the pressure generator are presented. It was found that the damped natural frequency of the …
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Endothelial Nitric Oxide Synthase and Growth Factor Regulation of Flow-Mediated Vascular Remodeling
… with arterial remodeling. Wall thickness to lumen diameter ratios did not change in any vessel at any time when compared to controls, suggesting normalization of flow-induced wall stress through vascular remodeling.</p>
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Pengaruh ekstrak etanol daun sirsak (Annona muricata L.) terhadap gambaran histologi kelenjar mammae mencit (Mus musculus) yang di induksi 7,12-dimentilbenz(a)antrasen (DMBA) secara in vivo
… duktus mammae, tebal epitel alveoli mammae, diameter lumen duktus mammae, diameter lumen alveoli mammae mencit (Mus musculus). Data yang diperoleh dianalisis dengan ANOVA satu arah, apabila terdapat perbedaan sangat nyata maka dilanjutkan dengan uji duncan. Hasil penelitian menunjukkan bahwa …
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Dense Collagen Materials and the Modulation of Fibrillogenesis for Tissue Engineering
… mould, the method yields seamless tubes whose lumen diameter and wall thickness can be adjusted independently. Uncrosslinked rat-calibre grafts tolerate arterial pressures, remain patent for 17 weeks after end-to-end aortic implantation and show progressive cellular infiltration without …
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LUMEN SEGMENTATION IN INTRAVASCULAR ULTRASOUND DATA
… of IVUS images refers to the delineation of the lumen/ intima and media/adventitia interfaces of the vessel. This process is necessary for assessing morphological characteristics of the vessel such as lumen diameter, minimum lumen cross-section area, and total atheroma volume. This information is …
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Dendroclimatology of Pinus sylvestris L. in the British Isles
… in terms of changes in wall thickness and lumen diameter. A comprehensive literature review on the physiological mechanisms controlling the response of tree-ring width and density in P. sylvestris to climate is described. The physiological causes-for the climate-growth response in earlywood …
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Regulation of Blood Vessel Development via Rho Family GTPase Signaling
… for the formation of continuous vascular lumens in growing vessels. Molecular bottlenecks were elucidated during vessel formation by dissecting the cellular events that require Rasip1. We show that Rasip1 controls different GTPase signaling pathways that converge upon the actomyosin …
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Characterizing the effects of in utero exposure to valproic acid on murine fetal heart development
… VPA on myocardial organization and ventricular lumen diameter. Lastly, we conducted qRT-PCR to measure the relative Mef2c gene expression in GD 16 murine hearts. Qualitative analysis of the murine hearts at GD 19 showed structural anomalies only in the hearts of VPA-treated mice. Additionally, …
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An investigation into stent expansion using numerical and experimental techniques
… designed rig such that they had an inner lumen diameter of 3 mm and a thickness of 0.5 mm, thus representing a typical porcine coronary artery geometry. These mock arteries were manufactured from compliant Sylgard elastomer 184 (Dow Corning). This material was chosen mainly due to its …
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Obesity-Induced Alterations in Sperm Quality, Testicular Morphology, and Extracellular Vesicle Localisation in Male Mice
… seminiferous tubular area (P=0.0287) and diameter (P=0.0252), decreased lumen diameter (P=0.0011), as well as a high presence of vacuolation and disorganised cellular arrangements. IHC staining showed visible differences in EV localisation between control and obese testes for CD63, CD9 and …
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Characterizing Inflammatory Mechanisms in Hidradenitis Suppurativa
… exhibiting decrease of tunnel wall and lumen diameter, as well as a decrease in clinical drainage. Taken together, this work provides novel insight into HS pathogenesis. Given the equally high inflammation present in lesional and perilesional HS skin, our data suggests there is a large …
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Peripheral and Cerebrovascular Function during the Female Lifespan
… was associated with higher carotid artery lumen diameter (p=0.01), as well as higher IMT at the carotid (0.70 [0.68, 0.73 mm] p<0.001), brachial (0.38 [0.36, 0.41mm] p=0.001) and femoral arteries (0.49 [0.46, 0.53 mm] p<0.001). Only cIMT (0.67 [0.63, 0.63 mm]) compared to Late-PRE-M women …
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A neuron within a neuron: the effect of narrow axonal ER tubules on molecular movement
… distances shows constrained continuity in its lumen. Narrow ER nanotubules could limit axial diffusion along the ER tubule lumen. I aimed to explore this model. I used *Drosophila* larval motor axons, in which I could use mutations in ER-shaping proteins to manipulate tubule properties and …
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Vascular and metabolic profile of 5-year sustained hypertensive versus normotensive black South Africans
… cross sectional wall area, maximum and minimum lumen diameter. Biochemical variables that were determined included HIV status, low-density lipoprotein-cholesterol, high-density lipoprotein-cholesterol, triglycerides, fasting glucose, glycated haemoglobin (HbA1c), creatinine clearance, …
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Brain derived neurotrophic factor and structural vascular disease in black Africans : the SABPA study
… a SonoSite Micromaxx ultrasound system. The lumen diameter between the near and far wall of the lumen-intima interface and the averages of both the left and right common carotid arteries were calculated. Subsequently, the carotid cross-sectional wall area (CSWA) was calculated. Participants, …