arterial blood gas
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Related to arterial blood gas: Venous Blood Gas
arterial blood gas
The concentration of oxygen and carbon dioxide in the blood, whose partial pressures are measured along with other factors such as blood pH in order to assess oxygen saturation and other metabolic indicators in patients, especially those with respiratory disorders.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
arterial blood gasCritical care Analysis of arterial blood for O2, CO2, bicarbonate content, and pH, which reflects the functional effectiveness of lung function and to monitor respiratory therapy Ref range pO2, 75-100 mm Hg; pCO2, 35-45 mm Hg; pH: 7.35-7.42, O2 content: 15-23%; O2 saturation, 94-100%; HCO3–, 22-26 mEq/L. See Metabolic acidosis, Metabolic alkalosis, Respiratory acidosis, Respiratory alkalosis.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
arterial blood gasAbbreviation: ABG
Any of the gases present in blood. Operationally and clinically, ABGs include the determination of levels of pH, oxygen (O2), and carbon dioxide (CO2) in the blood. ABGs are important in the diagnosis and treatment of disturbances of acid-base balance, pulmonary disease, electrolyte balance, and oxygen delivery. Values of the gases themselves are usually expressed as the partial pressure of carbon dioxide or oxygen although derived values are reported in other units. Several other blood chemistry values are important in managing acid-base disturbances, including the levels of the bicarbonate ion (HCO3), blood pH, sodium, potassium, and chloride.
See also: gas
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