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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
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 ...
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 ...
Cerebral hypoxia can also be classified by the cause of the reduced brain oxygen: [23] Hypoxic hypoxia – Limited oxygen in the environment causes reduced brain function. Divers, aviators, [24] Mountain climbers and firefighters are all at risk for this kind of cerebral hypoxia. The term also includes oxygen deprivation due to obstructions in ...
Hypoventilation is not synonymous with respiratory arrest, in which breathing ceases entirely and death occurs within minutes due to hypoxia and leads rapidly into complete anoxia, although both are medical emergencies. Hypoventilation can be considered a precursor to hypoxia, and its lethality is attributed to hypoxia with carbon dioxide toxicity.
Silent hypoxia (also known as happy hypoxia) [1] [2] is generalised hypoxia that does not coincide with shortness of breath. [ 3 ] [ 4 ] [ 5 ] This presentation is known to be a complication of COVID-19 , [ 6 ] [ 7 ] and is also known in walking pneumonia , [ 8 ] altitude sickness , [ 9 ] [ 10 ] [ 11 ] and rebreather diving .