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Hypoxemia (also spelled hypoxaemia) is an abnormally low level of oxygen in the blood. [ 1 ] [ 2 ] More specifically, it is oxygen deficiency in arterial blood. [ 3 ] Hypoxemia is usually caused by pulmonary disease.
Hypoxemia normally stimulates ventilation and produces dyspnea, but these and the other signs and symptoms of hypoxia are sufficiently variable in COPD to limit their value in patient assessment. Chronic alveolar hypoxia is the main factor leading to development of cor pulmonale — right ventricular hypertrophy with or without overt right ...
An SaO 2 (arterial oxygen saturation) value below 90% causes hypoxia (which can also be caused by anemia). Hypoxia due to low SaO 2 is indicated by cyanosis, but oxygen saturation does not directly reflect tissue oxygenation. The affinity of hemoglobin to oxygen may impair or enhance oxygen release at the tissue level.
Oxygen therapy is often useful in chronic hypoxemia caused by conditions such as severe COPD or cystic fibrosis. [3] [1] Oxygen can be delivered via nasal cannula, face mask, or endotracheal intubation at normal atmospheric pressure, or in a hyperbaric chamber. [4] [5] It can also be given through bypassing the airway, such as in ECMO therapy.
Acute or worsening respiratory distress (tachypnea, dyspnea, cyanosis, and/or hypoxemia) in the absence of other causes; Evidence of acute or worsening pulmonary edema (by physical examination or chest imaging) A chest x-ray showing pulmonary edema with bilateral pleural effusions. Along with:
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 ...
Caring.com reports on the evolving legislative approach to Alzheimer's in 2024 and beyond.
Situations that can cause asphyxia include but are not limited to: airway obstruction, the constriction or obstruction of airways, such as from asthma, laryngospasm, or simple blockage from the presence of foreign materials; from being in environments where oxygen is not readily accessible: such as underwater, in a low oxygen atmosphere, or in a vacuum; environments where sufficiently ...