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hypoxemia |
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hypoxemia /hy·pox·emia/ (hi″pok-sēm´e-ah) deficient oxygenation of the blood.
Hypoxemia An abnormally low amount of oxygen in the blood, the major consequence of respiratory failure, when the lungs no longer are able to perform their chief function of gas exchange. hypoxemia [hī′poksē′mē·ə] Etymology: Gk, hypo + oxys, sharp, genein, to produce, haima, blood an abnormal deficiency in the concentration of oxygen in arterial blood. Symptoms of acute hypoxemia are cyanosis, restlessness, stupor, coma, Cheyne-Stokes respiration, apnea, increased blood pressure, tachycardia, and an initial increase in cardiac output that later falls, producing hypotension and ventricular fibrillation or asystole. Chronic hypoxemia stimulates red blood cell production by the bone marrow, leading to secondary polycythemia. Hypoxemia caused by decreased alveolar oxygen tension or underventilation improves with oxygen therapy. Hypoxemia resulting from shunting of blood from the right side of the heart to the left side without exchange of gases in the lungs is treated with bronchial hygiene and positive end-expiratory pressure. Also spelled hypoxaemia. Compare hypoxia. See also anoxia, asphyxia. hypoxemia (hī·p n condition in which oxygen levels in arterial blood are low. Typical symptoms are apnea, increased blood pressure, tachycardia, restlessness, stupor, coma, Cheyne-Stokes respiration, hypotension due to increased initial cardiac output that has rapidly fallen, ventricular fibrillation, and other conditions. hypoxemia (hī´poksē´mē n a deficient oxygenation of the blood. hypoxemia deficient oxygenation of the blood. The most reliable method for measuring the degree of hypoxemia is blood gas analysis to determine the partial pressure of oxygen in the arterial blood. Decreased oxygenation of the blood eventually leads to hypoxia. hypoxemia Hypoxia ↓ O2 in the blood How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Twelve patients (group B) had bacterial lobar pneumonia (11 patients) or acute respiratory distress syndrome (1 patient) diagnosed by typical signs and symptoms, hypoxemia, pulmonary infiltrates, and prompt clinical response to [beta]-lactam antimicrobial drugs (16,17). Arterial blood gases demonstrated severe hypoxemia in all patients and some with hypercapnea (12 of 30) (Sandoval et al. However, present thought considers hypoxemia, or deprivation of oxygen to the systems of the body, the most important physiological consequence of drowning. |
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