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10 Cards in this Set
- Front
- Back
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What are side effects of NaHCO3 administration?
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1) CO2 accumulation in blood causing decreasing pH
2) hypernatremia 3)hyperosmolarity 4)increased risk of intraventricular hemorrhage 5)rebound alkalosis shifting 6) shift hgb sat curve to left |
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What is a side effect of NaHCO3 in CSF and why?
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Because HCO3 crosses the BBB much more slowly than CO2, a paradoxical CSF acidosis results despite a normal or high blood pH.
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How much does the PCO2 of blood change each degree centigrade cooler?
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decreases about 4.5%
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How much does the pH of blood change each degree centigrade cooler?
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increases about 0.015
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What is the primary electrolyte abnormality that causes a metabolic alkalosis?
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increase in bicarbonate concentration
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What are common causes of metabolic alkalosis?
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1) loss of H+ rich gastric fluid (vomiting, NG suction)
2) loop diuretics and thiazides that cause excretion of acidic urine |
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What is the recommended anticoagulant for an ABG sample?
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Heparin (EDTA, citrates, and oxalates alter pH)
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What effect will an air bubble in an ABG sample have on PaCO2 and PaO2?
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PaCO2 will decrease and PaO2 will increase (assuming PaO2 in the sample is lower than in the bubble)
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How should an MvO2 sample be drawn in order to prevent contamination by capillary blood?
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Slowly
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Why should ABG samples be stored in ice?
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To slow blood metabolism
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