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 142 for “"Oxygen saturation"”.
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Non-invasive Optoacoustic Monitoring of Neonatal Cerebral Venous Oxygen Saturation
… quickly and accurately measure cerebral venous oxygen saturation. While diagnosis of neonatal cerebral hypoxia is limited, treatment with cerebral hypothermia has shown to decrease both mortality and long-term neurodevelopmental disabilities in neonates with moderate to severe cerebral hypoxia. …
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Development of an Oxygen Saturation Monitoring System by Embedded Electronics
<p>Measuring Oxygenation of blood (SaO2) plays a vital role in patient’s health monitoring. This is often measured by pulse oximeter, which is standard measure during anesthesia, asthma, operative and post-operative recoveries. Despite all, monitoring Oxygen level is necessary for infants with …
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The development of a continuous blood oxygen saturation measuring and control system
… continuously monitors and controls the blood oxygen saturation at the outlet of a membrane-type oxygenator. A reflection oximeter was developed which employs the ratio of the incident light intensity at two wavelengths to obtain the continuous blood oxygen saturation measurement. The ratio of …
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Use of near-infrared spectroscopy to identify trends in regional cerebral oxygen saturation in horses
… (NIRS) to identify trends in regional cerebral oxygen saturation (rSO2) in both conscious and anaesthetised healthy horses. A cerebral/somatic oximeter sensor recorded rSO2 from the dorsal sagittal sinus of 6 healthy horses. Values for rSO2, arterial and venous oxygen and carbon dioxide tensions …
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Polynomial system identification modeling and adaptive model predictive control of arterial oxygen saturation in premature infants
… of the regulation of the fraction of inspired oxygen (FiO2) in neonatal mechanical ventilation to treat respiratory distress syndrome has proven challenging due to competing objectives: maintaining arterial oxygen saturation levels (SpO2) while simultaneously not inducing complications such as …
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Analysis and validation of an artifact resistant design for oxygen saturation measurement using photo pletyhsmographic ring sensors
Recent advances in continuous noninvasive health monitoring technologies provide clinicians and researchers with a previously unrealistic opportunity for closely tracking the developments and treatments of various pathologies both within and outside of a clinical setting. At the same time, …
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Validation of tissue oxygen saturation determined by near-infrared spectroscopy in canine models of hypoxemia and hemorrhagic shock
… was to evaluate the relationship between tissue oxygen saturation (StO2) and oxygen delivery index (DO2I). Oxygen delivery index is product of two factors arterial oxygen content (CaO2) and cardiac index (CI). In this study the relationship between DO2I and StO2 was evaluated by manipulating both …
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In vivo investigations of photoplethysmograms and arterial oxygen saturation from the auditory canal in conditions of compromised peripheral perfusion
… photoplethysmography (PPG) to estimate arterial oxygen saturation (SpO2). In conditions of poor peripheral perfusion such as hypotension, hypothermia, and vasoconstriction, the PPG signals detected are often small and noisy, or in some cases unobtainable. Hence, pulse oximeters produce erroneous …
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The Effect of Red Blood Cell Velocity on Oxygenation Measurements using Resonance Raman Spectroscopy
… can be used to estimate the hemoglobin oxygen saturation. Previous studies have demonstrated that exposure of oxygenated red blood cells to laser illumination may result in photo-induced displacement of oxygen from hemoglobin. In this study, an in vitro model was used to evaluate the …
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Multispectral Imaging of Skin Oxygenation
… for quantitative measurement of skin tissue oxygen saturation (StO2). Oxygen saturation is the percentage of oxygen carried in the blood over the total oxygen carrying capacity of blood. Skin StO2 is an important indicator of skin tissue clinical status. Measurement of skin tissue oxygenation …
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Changes in LDH Activity in Cryptobranchus Due to Imposed Environmental Stress
… alleganiensis alleganiensis was studied. Water oxygen saturation was decreased from 100 to 25 to 10% to produce a state of hypoxia, thereby forcing respiration along anaerobic pathways. The effect of increasing temperature (5-25°C) upon the enzyme was also studied. The effects of temperature and …
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Microvascular oxygen transport: development of an optical triplicator
Microvascular oxygen transport has been studied using many experimental methods. The three wavelength photometric method of Pittman and Duling (6) was the basis for this project. An optical triplicator was introduced into the microscopy assembly. The triplicator’s function was to take the image …
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A monitoring and display system for a cardiopulmonary bypass loop
… signals representing blood temperature and oxygen saturation of sample points entering and leaving the blood oxygenator, patient temperature, oxygenator heat exchanger water temperature and hemoglobin content are monitored and displayed. The hemoglobin content and oxygen saturation signals, …
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An analog VLSI front end for pulse oximetry
… and continuous method for monitoring the oxygen saturation of a patient's blood. In modem medical practice, blood oxygen level is considered one of the important vital signs of the body. The pulse oximeter system consists of an optoelectronic sensor that is normally placed on the subject's …
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Design of a patient monitoring system for cardiopulmonary bypass surgery
… the hemoglobin content, the arterial oxygen saturation, the venous oxygen saturation, the oxygen consumption, and the blood flow rate through the cardiopulmonary bypass circuit. Additionally, there are three individual timers available. Details and the evaluation of the hardware and …
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Phytoplankton induced changes of air bubble residence time in seawater
… seawater, such as temperature, salinity and gas saturation level. The impact of biological factors on the behaviour of air bubbles in seawater has not previously been investigated. It is hypothesised that phytoplankton influence BRT through the production of dissolved organic material (DOM) and …
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The development of biomedical instrumentation using backscattered laser light
… concerned with the measurement of blood flow and oxygen saturation in the microcirculation using the techniques of laser Doppler flowmetry and pulse oximetry. An investigation of the responses of Doppler flowmeters using different signal processing bandwidths and laser sources revealed two major …
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Predictive modeling of health status using motion analysis from mobile phones
… measures like walk speed, pulmonary function and oxygen saturation variation for health status of cardiopulmonary patients. The dissertation is to summarize my studies of using sensor data from regular smartphones to accurately measure walking patterns, in order to monitoring health status for …
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Serial Orthostatic Parameter Measurements in the Elderly
… the trends in blood pressure, heart rate, and oxygen saturation after orthostatic changes in elderly men and women. A prospective descriptive design was used to obtain multiple serial measurements in identifying responses to postural changes. The convenience sample was composed of 5 men and 5 …
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Cerebral Hemodynamics and Its Oxygenation: Study of Their Baseline and Spontaneous Oscillation
… for in vivo monitoring of hemodynamics and oxygen saturation in tissue. For this work, I have developed a large-ranged multidistance probe for NIBS, which allows measurements of cerebral hemodynamics and oxygen saturation. The measurements on the adult forehead were analyzed using a …
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