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An arterial blood gas (ABG) test, or arterial blood gas analysis (ABGA) measures the amounts of arterial gases, such as oxygen and carbon dioxide. An ABG test requires that a small volume of blood be drawn from the radial artery with a syringe and a thin needle , [ 1 ] but sometimes the femoral artery in the groin or another site is used.
[3] [4] If an anesthetic has a high coefficient, then a large amount of it will have to be taken up in the body's blood before being passed on to the fatty (lipid) tissues of the brain where it can exert its effect. The potency of an anesthetic is associated with its lipid solubility, which is measured by its oil/gas partition coefficient. [5]
Low oxygen saturation in blood and disturbed arterial blood gas readings support the proposed diagnosis by suggesting a pulmonary shunt. Blood tests are performed for electrolytes (sodium, potassium) and markers of renal function (creatinine, urea). Elevated creatine levels may suggest a cardiogenic cause of pulmonary edema. [12]
An SaO 2 (arterial oxygen saturation, as determined by an arterial blood gas test [8]) value below 90% indicates hypoxemia (which can also be caused by anemia). Hypoxemia due to low SaO 2 is indicated by cyanosis. Oxygen saturation can be measured in different tissues: [8]
A pulse oximeter probe applied to a person's finger. A pulse oximeter is a medical device that indirectly monitors the oxygen saturation of a patient's blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmogram that may be further processed into other measurements. [4]
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Latinos Define Their Identity In Stunning Photo Essay
Computed tomography (CT scanning) is a more sensitive test for pulmonary contusion, [6] [33] and it can identify abdominal, chest, or other injuries that accompany the contusion. [38] In one study, chest X-ray detected pulmonary contusions in 16.3% of people with serious blunt trauma, while CT detected them in 31.2% of the same people. [ 45 ]