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 15 of 15 for “"Lower Body Negative Pressure"”.
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Development of fMRI compatible lower body negative pressure system
The lower body negative pressure (LBNP) system provides a controlled, measured orthostatic stress to the cardiovascular system, which can be used with a magnetic resonance imaging (MRI) machine to study cardiovascular and cerebrovascular responses to graded LBNP. In the past, even though functional …
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Tolerance to Lower Body Negative Pressure: Effects of Sex and Sufentanil
… reduces tolerance to a simulation of hemorrhage (lower-body negative pressure; LBNP). METHODS: Participants for both studies were instrumented for continuous measurements of heart rate (electrocardiography), beat-to-beat blood pressure (finometer), and muscle sympathetic nerve activity …
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Designing a Localized Lower Body Negative Pressure Garment for Long-Duration Spaceflight
Lower Body Negative Pressure (LBNP) has long been explored as a countermeasure to the physiological deconditioning and orthostatic intolerance associated with prolonged microgravity exposure. Traditional LBNP systems, however, are large, stationary devices that require astronauts to remain immobile …
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Partial Gravity Load Simulation Using Mechanical Off-Loading and Lower Body Negative Pressure
… Second, this thesis evaluates a collapsible lower body negative pressure (LBNP) suit as a wearable countermeasure for micro and partial gravity environments. By applying negative pressure to the lower body, the suit helps restore the mechanical loading and hydrostatic fluid gradients …
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Does altering brachial artery tone with lower-body negative pressure and flow-mediated dilation affect arterial stiffness?
… affected by sympathetic stimulation induced via lower-body negative pressure (LBNP). Similarly, the impact of flow-mediated dilation (FMD) on brachial artery compliance and distensibility remains unresolved, hi addition, before such measures can be used as prognostic tools, it is important to …
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Adaptive Control Strategies for Mitigating Spaceflight Fluid Shifts Using Lower Body Negative Pressure and Non-Invasive Fluid Shift Sensing
… of the feedback from these sensors into Lower Body Negative Pressure (LBNP) chambers could allow for the development of an adaptive Lower Body Negative Pressure regulation framework. Coaxial RF sensors were designed and characterized using tissue phantoms, and tested in a human subject …
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A Novel Resistance Exercise Machine for Use in a Lower Body Negative Pressure Box to Counteract the Effects of Weightlessness
… missions. Resistance exercise coupled with lower body negative pressure (LBNP) has been shown to be effective in counteracting some of the deconditioning related problems. This thesis describes the development of a compact and effective resistance exercise machine that works within an …
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Peripheral and Central Muscarinic Cholinergic Receptors in Arterial Blood Pressure Regulation
… 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 arterial blood …
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A critical benefit analysis of artificial gravity as a microgravity countermeasure
… (i.e. resistive exercise, aerobic exercise, lower body negative pressure, or some variation of these). Animal studies were also evaluated to supplement the knowledge base and to fill gaps in the human countermeasure literature. Designs of published studies, such as study duration, …
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Effects of thermal stimuli during simulated hemorrhaging on aspects of cognitive performance
… be detrimental to the maintenance of arterial pressure, cerebral perfusion, and may also impact cognitive function. PURPOSE: To test the hypothesis that mildly heating an otherwise normothermic individual can be detrimental to cognitive function during a simulated mild hemorrhagic insult. …
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The severity of stages estimation during hemorrhage using error correcting output codes method
… system. The proposed system is tested agasint Lower Body Negative Pressure (LBNP) dataset, and the results indicate the accuracy and reliability of the proposed system.
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Gastroenteropankreatische Peptide, Streß- und flüssigkeitsregulierende Hormone bei LBNP-induziertem Orthostase-Streß
… The orthostatic stress was applied by using a lower body negative pressure (LBNP)-device. 2 standardized profiles of orthostatic stress were used which differed with respect to the sequences and intensities of negative pressure steps. Material / Methods: 18 healthy (10 males, 8 females) test …
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Examining endothelial function in humans in vivo: improving guidelines and exploring novel measures
… FMD, including the presence of hypertension, a lower resting FMD%, a larger baseline artery diameter, a longer time between subsequent measurements, and less laboratory experience with the measurement. Future studies should take these factors into consideration, as certain measures may lower …
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PROCESSING AND CLASSIFICATION OF PHYSIOLOGICAL SIGNALS USING WAVELET TRANSFORM AND MACHINE LEARNING ALGORITHMS
… In particular, Electrocardiogram (ECG), blood pressure (BP) and impedance are among the most important biomedical signals processed and analyzed. The majority of studies that utilize these signals attempt to diagnose important irregularities such as arrhythmia or blood loss by processing one of …