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 20 for “"blood oxygen saturation"”.
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The development of a continuous blood oxygen saturation measuring and control system
… which 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 …
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Non-invasive estimation of skin chromophores using Hyperspectral Imaging
… exhibits distinctive variations in melanin and blood concentration values in the form of skin lesions. The current approach for evaluating skin cancer lesions involves visual inspection with a dermatoscope, typically followed by biopsy and histopathological analysis. However, this process, to …
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Non-invasive Estimation of Skin Chromophores Using Hyperspectral Imaging
… exhibits distinctive variations in melanin and blood concentration values in the form of skin lesions. The current approach for evaluating skin cancer lesions involves visual inspection with a dermatoscope, typically followed by biopsy and histopathological analysis. However, to decrease the …
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Agnostic Testing Kiosk for Remote Vitals Sensing
… heart rate, respiratory rate, body temperature, blood oxygen saturation, motion performance, ambient temperature and relative humidity, and position, with options to add more sensors. This system will act as a plug-and-play prototyping system for current and future projects of any remote vitals …
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Correlation and real time classification of physiological streams for critical care monitoring.
… significant relative changes in heart rate, blood oxygen saturation levels and pauses in breathing in the respiratory impedance signal. The accuracy of the algorithm for detecting these is 97.8%, 98.3% and 98.9% respectively. The accuracy for correlating the streams and determining spells …
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Analysis of the Effects of Hypoxia on Cognitive Processing Ability
… repeated measures analysis with five levels of oxygen saturation used the <a href="http://search.proquest.com.ezproxy.libproxy.db.erau.edu/pqdtglobal/docview/1499890509/abstract/F026CBBBA0574DDEPQ/1?accountid=27203#">Embry Riddle Aeronautical University</a> Normobaric High Altitude Lab (HAL) to …
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Cardiorespiratory abnormalities in early and advances stage mouse models of Duchenne muscular dystrophy
… oximetry, we assessed respiratory function and blood oxygen saturation (SaO2). At 12 months of age, Dmdmdx4cv mice exhibited significantly lower respiratory frequency and oxygen consumption. However, ventilation (Ve) and ventilatory equivalent (Ve/VCO2) were not different compared to wild-type …
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Contactless Sleep and Physiological Monitoring Using Artificial Intelligence and Radio Waves
… AI models that infer critical biomarkers—such as blood oxygen saturation (SpO₂) and inflammation (C-reactive protein levels)—in a fully passive and non-intrusive manner. Finally, inspired by the success of large language models, we show that physiological signals can be represented and interpreted …
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A study to investigate whether speed and road conditionshave an effect on the physiological stability of sick and preterm babies undergoing inter-hospital transfer by ambulance
… physiological parameters (heart rate, arterial blood pressure, respiratory rate and blood oxygen saturation) against speed and g forces experienced in three dimensions, longitudinal direction (x-axis), lateral (y-axis) and vertical direction (z-axis). Data was collected using a DL1 …
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Wearable Medical Device Ecosystems Through Machine Learning and Cloud Computing
… key health metrics such as heart rate and blood oxygen saturation in real-time and alerting to worrying trends. Using similar machine learning tools, this same cloud system could also provide long-term guidance to clinicians informed by the patient’s history, creating a pipeline between …
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MRI based cerebral oxygenation measures in humans : technical development for use across lifespan
MRI based cerebral oxygenation measures could enable brain-centered clinical care and improve understanding of brain energy use throughout human development. We made technical improvements to two MR oxygenation imaging techniques, and explored the concordance between various methods to quantify the …
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Sleep and Cardiac Tachyarrhythmia: Results from the Cross-Sectional Sleep Heart Health Study
… cardiac arrhythmias. Exposure variables included blood oxygen saturation, sleep stages, and tertiles of sleep quality and quantity. Unadjusted and adjusted logistic regression was used to quantify the association between sleep and non-sleep related factors and arrhythmia. Results: Of the original …
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Optical coherence tomography for retinal diagnostics
… tomography (DWP-OCT) for microvasculature blood oxygen saturation (SO2) measurement. In the study, a single-mode-fiber based polarization-sensitive swept-source OCT (PS-SS-OCT) with polarization modulator, polarization-sensitive bulk-optics balanced detection module is constructed and …
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Reflectance photoplethysmography for non-invasive monitoring of tissue perfusion
Monitoring blood perfusion and oxygenation changes is of vital importance and for this reason many different techniques have been developed over the decades. Photoplethysmography (PPG) is an optical technique that measures blood volume variations in vascular tissue and it is well known for its …
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Development of Quantitative Ultrasound-Mediated Molecular Imaging of The Tumor Microenvironment
… <p>Two such biomarkers of interest are blood oxygen saturation (SO<sub>2</sub>) and cell receptor expression. SO<sub>2 </sub>is a measure of the fraction of hemoglobin which is bound to oxygen, which has been shown to correlate to tumor progression. Additionally, several cancer subtypes …
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Development of Quantitative Molecular Photoacoustic Imaging For Noninvasive Cancer Diagnostics
… become visible. One biomarker of interest is blood oxygen saturation (SO<sub>2</sub>) due to its correlation with hypoxia, which is associated with increased tumor malignancy; some studies have also established SO<sub>2</sub> as an independent biomarker of disease progression. Additionally, …
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Investigation of splanchnic perfusion utilising an intraluminal opto-electronic sensor placed in the duodenum
… response is activated, it exhibits regulation of blood flow and extraction of oxygen, facilitating redistribution of blood to vital organs. This can ultimately lead to systemic inflammatory response and multiple organ failure. The vital need to monitor the perfusion of the splanchnic region in …
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Investigation of fontanelle photoplethysmographs and oxygen saturations in intensive care neonates and infants utilising miniature photometric sensors
… babies on intensive care, information regarding blood oxygen saturation (SpO2) is determined non-invasively by a device called a pulse oximeter. Sensors are usually placed on a hand or foot where their operation relies on the presence of pulsatile arterial blood. Light shines at two or more …
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Optical sensors for the in vivo assessment of flap perfusion in plastic surgery
… where skin and adipose tissue along with their blood supplies are transferred from the lower abdomen to the chest. The success of free flap reconstructive surgery depends strongly on the maintenance of adequate perfusion in the flap. Early diagnosis of ischaemia and surgical exploration to …
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Multi-modal molecular imaging of radiation therapy response in the tumour vascular microenvironment
… changes in the tumour vascular architecture and blood oxygen saturation, which are closely linked to tumour hypoxia. Given the strong relationship between hypoxia and radioresistance, PAI assessment of the tumour vascular microenvironment has the potential to detect radioresistance and response …