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Silent hypoxia (also known as happy hypoxia) [115] [116] is generalised hypoxia that does not coincide with shortness of breath. [117] [118] [119] This presentation is known to be a complication of COVID-19, [120] [121] and is also known in atypical pneumonia, [122] altitude sickness, [123] [124] [125] and rebreather malfunction accidents. [126 ...
Tissue hypoxia refers to low levels of oxygen in the tissues of the body and the term hypoxia is a general term for low levels of oxygen. [2] Hypoxemia is usually caused by pulmonary disease whereas tissue oxygenation requires additionally adequate circulation of blood and perfusion of tissue to meet metabolic demands. [4]
Other mechanisms include hypoxia-inducible factors, particularly HIF1. [2] Hormonal changes have also been associated with HVR, particularly those that affect the functioning of the carotid bodies. [5] As HVR is a response to decreased oxygen availability, [1] it shares the same environmental triggers
Generalized hypoxia is a medical condition in which the tissues of the body are deprived of the necessary levels of oxygen due to an insufficient supply of oxygen, which may be due to the composition or pressure of the breathing gas, decreased lung ventilation, or respiratory disease, any of which may cause a lower than normal oxygen content in the arterial blood, and consequently a reduced ...
Hypoxia means a lower than normal level of oxygen, and may refer to: Reduced or insufficient oxygen. Hypoxia (environmental), abnormally low oxygen content of a ...
Divers, aviators, [24] mountain climbers, and fire fighters are all at risk for this kind of cerebral hypoxia. The term also includes oxygen deprivation due to obstructions in the lungs. Choking, strangulation, the crushing of the windpipe all cause this sort of hypoxia. Severe asthma exacerbations may also lead to symptoms of hypoxic hypoxia.
[5] [6] It also implies local hypoxia in a part of a body resulting from constriction (such as vasoconstriction, thrombosis, or embolism). Ischemia causes not only insufficiency of oxygen but also reduced availability of nutrients and inadequate removal of metabolic wastes. [7] Ischemia can be partial (poor perfusion) or total blockage. The ...
For this reason, some climbers carry supplemental oxygen to prevent hypoxia, edema, and HAPE. The standard drug treatment of dexamethasone does not alter the hypoxia or the consequent vasoconstriction, but stimulates fluid reabsorption in the lungs to reverse the edema. Additionally, several studies on native populations remaining at high ...