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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 ...
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]
10–80 per 100,000 Respiratory failure results from inadequate gas exchange by the respiratory system , meaning that the arterial oxygen, carbon dioxide, or both cannot be kept at normal levels. A drop in the oxygen carried in the blood is known as hypoxemia ; a rise in arterial carbon dioxide levels is called hypercapnia .
Hypoxia: Poor oxygen delivery (hypoxia) in utero resulting in compensatory increased production of red blood cells (erythropoeisis). Hypoxia can be either acute or chronic. Acute hypoxia can occur as a result of perinatal complications. Chronic fetal hypoxia is associated with maternal risk factors such as hypertension, diabetes and smoking. [10]
Ongoing research has shown that patients have experienced hypoxia at leukocyte levels below 100 x 10^9 / L (100,000 / microL), therefore patients with leukemia need regular neurological and respiratory monitoring when leukocyte counts are approaching 100 x 10^9 / L (100,000 / microL) to decrease chances of tissue hypoxia.
Asphyxia or asphyxiation is a condition of deficient supply of oxygen to the body which arises from abnormal breathing. [3] [4] Asphyxia causes generalized hypoxia, which affects all the tissues and organs, some more rapidly than others.
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Pulmonary edema can cause permanent organ damage, and when sudden (acute), can lead to respiratory failure or cardiac arrest due to hypoxia. [7] The term edema is from the Greek οἴδημα (oidēma, "swelling"), from οἰδέω (oidéō, "(I) swell"). [8] [9]