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 155 for “"Arterial Blood"”.
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Arterial blood pressure estimation using ultrasound
While blood pressure is commonly used by doctors as an indicator of patient health, the available techniques to measure the quantity suffer from many inconveniences such as cutting off blood flow, being cumbersome to use, being invasive, or being inaccurate. The research addresses many of these …
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Mathematical modeling of foetal arterial blood flow
… various haemodynamic viriables on common Doppler blood flow velocity waveform indices. The foetal model consists of an number of vascular compartments, cascaded together using electrical transmission line analogies.
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Modeling arterial blood flow using radial basis functions
<p>Investigation into the mechanics of blood flow in arteries helps provide insight into the mechanism of cardiovascular disease. As experimental measurements can be difficult, it is of interest to apply numerical simulation to the problem. This thesis examined fluid flow in arteries using a …
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Cardiac output estimation using arterial blood pressure waveforms
… that CO could be estimated by analysis of the arterial blood pressure (ABP) waveform has captured the attention of many investigators. This approach of estimating CO is minimally invasive, cheap, and can be done continuously as long as ABP waveforms are available. Over a dozen different methods …
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Using distributed machine learning to predict arterial blood pressure
This thesis describes how to build a flow for machine learning on large volumes of data. The end result is EC-Flow, an end to end tool for using the EC-Star distributed machine learning system. The current problem is that analysing datasets on the order of hundreds of gigabytes requires overcoming …
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Study of arterial blood pressure and hypertension in Benin City
A review of the blood pressures in different populations shows that the blood pressure of the black African rises with age and that hypertension is not uncommon in the black African, hypertension is more common and the consequences more severe in the black American than his white counterpart. In …
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Risk stratification of ICU patients using arterial blood pressure waveforms
… extends non-invasive risk stratification to Arterial Blood Pressure (ABP) Waveforms. We derive and analyze classifiers based on the morphological distance time series (derived from beat-to-beat morphology changes in the ABP waveform) including ASDNNmd, SDANNmd, rMSSDmd, the MVABP score etc. …
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Peripheral and Central Muscarinic Cholinergic Receptors in Arterial Blood Pressure Regulation
… and Central Muscarinic Cholinergic Receptors in Arterial Blood Pressure Regulation. Master of Science (Biomedical Sciences), December, 1999, 70 pp., 7 tables, 8 illustrations, references, 83 titles. This study was designed to test the hypothesis that an age-related vagal dysfunction compromises …
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Estimation of cardiovascular indices by analysis of the arterial blood pressure signal
… peripheral resistance (TPR) by analysis of the arterial blood pressure (ABP) signal. The algorithms incorporate cardiovascular physiology within the framework of a generalized Windkessel model, which is a widely accepted cardiovascular model. Algorithms to identify end systole were also …
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Arterial blood pressure estimation using ultrasound technology and transmission line arterial model
… the application of a transmission line model to arterial measurements in order to derive useful cardiovascular parameters. Non-invasive ultrasound techniques are used to make these measurements, which has several benefits over invasive methods such as arterial catheterization. However, invasive …
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The BOLD MRI response of the brain to alterations in arterial blood pressure
The impact of blood pressure changes on cerebral blood flow is an important area of investigation. The cerebral autoregulation mechanism acts to maintain blood supply to the brain, despite changes in blood pressure. Blood flow alterations are closely linked to neuronal activation, and this activity …
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Cardiac output estimation from arterial blood pressure waveforms using the MIMIC II database
… accuracy of cardiac output (CO) estimation from arterial blood pressure (ABP) was evaluated using data from the Multi-Parameter Intelligent Patient Monitoring for Intensive Care (MIMIC) II database. Thermodilution CO (TCO) was the gold standard, and a total of 121 records with 1,497 TCO …
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An observational study of student osteopaths' measurement of arterial blood pressure by sphygmomanometry and auscultation
… demonstrate when applying their undergraduate blood pressure (BP) measurement training in a clinical situation. Thirty-seven volunteer postgraduate participants were watched measuring blood pressure in a mock clinical situation by two observers. Both observers according to whether or not each …
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Machine Learning Applications for Time Series Data: Motor Anomaly Detection and Mean Arterial Blood Pressure Estimation
… Operation Detection, and (2) Estimation of Mean Arterial Blood Pressure (MAP) from ultrasound measurements. In the first application, we explore different algorithms for detecting anomalous fan motor operation on a small microcontroller unit (MCU). Results show that a CNN model can maintain 99% …
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Continuous estimation of cardiac output and arterial resistance from arterial blood pressure using a third-order Windkessel model
… is routinely monitored using various sensors. Arterial blood pressure (ABP) and heart rate (HR) are the most commonly recorded waveforms which provide key information to the ICU clinical staff. However, clinicians find themselves in many cases unable to determine the causes behind abnormal …
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Effect of Selective and Nonselective Cyclooxygenase Enzyme Inhibition on Arterial Blood Pressure and Cerebral Blood Flow with Exposure to Intermittent Hypoxia in Humans
… (IH) simulating obstructive sleep apnea raises blood pressure (BP) and impairs cerebral blood flow response. The pathophysiology of intermittent hypoxia-mediated increase in BP involves multiple mechanisms but the role of cyclooxygenase (COX) catalyzed vasoactive prostaglandins (PG) is unclear. …
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Reconstructing the blood pressure waveform using a wearable photoplethysmograph sensor and hydrostatic pressure variations measured by accelerometers
… clinical examination is the assessment of the arterial blood pressure waveform. The variations in shape of the waveform indicate the presence of disease. In this work, a method is developed for the reconstruction of arterial blood pressure waveform using the signals obtained from a noninvasive …
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Central Cardiovascular Effects of Arginine Vasopressin in the Lateral Habenular Region in Anesthetized Rats
… fibers was investigated by measuring changes in arterial blood pressure and heart rate following central microinjections of arginine vasopressin into the left lateral habenular nucleus of anesthetized rats. Microinjections of this nonapeptide elicited a significant and immediate increase in …
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Long short-term memory recurrent neural networks for classification of acute hypotensive episodes
… condition durich which a patient's mean arterial blood pressure drops below 60 mmHG for a period of 30 minutes. This thesis presents the development and evaluation of a series of Long short-term memory recurrent neural network (LSTM RNN) models which predict whether a patient will …
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