Results 161 to 170 of about 19,463 (207)
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Hyperoxia for performance and training
Journal of Sports Sciences, 2017Recent technological developments have made it possible to use hyperoxia as an enhancement aid during training. Athletes wearing a mask can breathe a higher fraction of oxygen from a stationary or portable apparatus while exercising. A large body of evidence indicates that the oxygen transport capacity, lactate metabolism, power output and work ...
D. A. Cardinale, B. Ekblom
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Cerebral Perfusion Response to Hyperoxia [PDF]
Journal of Cerebral Blood Flow and Metabolism, 2007 Graded levels of supplemental inspired oxygen were investigated for their viability as a noninvasive method of obtaining intravascular magnetic resonance image contrast. Administered hyperoxia has been shown to be effective as a blood oxygenation level-dependent contrast agent for magnetic resonance imaging (MRI); however, it is known that high levels
Peter Jezzard, Richard Wise
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Current Opinion in Pulmonary Medicine, 1998
Experimental studies and few human reports demonstrate that hyperoxia increases the level of reactive oxygen-derived free radicals and that these substances can produce oxidative cellular injury. However, available data suggest that the human lung is more resistant to hyperoxic oxidative damage than previously expected and demonstrate that absorption ...
C R, Carvalho +3 more
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Experimental studies and few human reports demonstrate that hyperoxia increases the level of reactive oxygen-derived free radicals and that these substances can produce oxidative cellular injury. However, available data suggest that the human lung is more resistant to hyperoxic oxidative damage than previously expected and demonstrate that absorption ...
C R, Carvalho +3 more
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Chest, 1974
N umerous studies have been conducted on the pathologic changes that occur in the lung due to exposure to hyperbaric oxygen. These studies indicate that the entire lung, from the epithelium of the upper respiratory tract down to the pulmonary capillary endothelium, can be damaged by prolonged exposure to elevated partial pressures of oxygen.' Reports ...
W D, Currie, P C, Pratt, A P, Sanders
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N umerous studies have been conducted on the pathologic changes that occur in the lung due to exposure to hyperbaric oxygen. These studies indicate that the entire lung, from the epithelium of the upper respiratory tract down to the pulmonary capillary endothelium, can be damaged by prolonged exposure to elevated partial pressures of oxygen.' Reports ...
W D, Currie, P C, Pratt, A P, Sanders
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Pathways of cell signaling in hyperoxia
Free Radical Biology and Medicine, 2003Administration of high concentrations of oxygen (hyperoxia) is a mainstay of supportive treatment for patients suffering from severe respiratory failure. However, hyperoxia, by generating excess systemic reactive oxygen species (ROS), can exacerbate organ failure by causing cellular injury.
Patty Lee
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Effects of hyperoxia on phagocytosis
Blut, 1982The development of bacterial infections is a common complication during treatment with high concentrations of oxygen. To study the effect of hyperoxia on phagocytes, the adherence, chemotaxis, ingestion rates, degranulation as well as the bactericidal activity were measured in alveolar macrophages (AMs) and polymorphonuclear leukocytes (PMNs) obtained ...
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Response of choroidal blood flow in the foveal region to hyperoxia and hyperoxia-hypercapnia
Current Eye Research, 2000Arterial carbon dioxide tension and arterial oxygen tension are important determinants of retinal and cerebral blood flow. In the present study the hypothesis that changes in arterial blood gases also influence choroidal blood flow was tested.The effect of breathing different mixtures of oxygen (O(2)) and carbon dioxide (CO(2)) on choroidal blood flow ...
M H, Geiser +5 more
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Current Opinion in Critical Care, 2004
Currently, no neuroprotective therapies have been shown to reduce the secondary neuronal damage occurring after traumatic brain injury. Recent studies have addressed the potentiality of hyperoxia to ameliorate brain metabolism after traumatic brain injury.
L.G. Longhi, N. Stocchetti
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Currently, no neuroprotective therapies have been shown to reduce the secondary neuronal damage occurring after traumatic brain injury. Recent studies have addressed the potentiality of hyperoxia to ameliorate brain metabolism after traumatic brain injury.
L.G. Longhi, N. Stocchetti
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Diaphragmatic fatigue in normoxia and hyperoxia
Journal of Applied Physiology, 1985Diaphragmatic fatigue was induced in six normal young men inspiring against a variable alinear resistance. Breathing pattern was rigidly controlled (tidal volume 0.75 liter, 12 breaths . min-1). Fatigue was defined as an inability to continue to generate a target transdiaphragmatic pressure (Pdi = 0.65 - 0.84 Pdimax). Diaphragmatic electromyogram (EMG,
R L, Pardy, P T, Bye
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Alcohol Poisoning and Venous Hyperoxia
Toxicology Mechanisms and Methods, 2008ABSTRACT Venous PCO(2) and PO(2) in the presence of normal arterial PCO(2) and PO(2) in patients with alcoholic intoxication have not been previously evaluated. The objective of this study was to compare arterial and venous blood gases in patients with alcoholic intoxication and healthy controls.
Alexander P, Rozin +5 more
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