Arterial Blood Gas Interpretation for NCLEX Exam Part 2 2022
1. 1. Question In acid-base balance, the normal plasma PCO2 and bicarbonate levels are disturbed. Match the changes in this parameter with the disorders in the given choices: Low plasma PaCO2 o A. Metabolic Acidosis o B. Respiratory Alkalosis o C. Metabolic Alkalosis o D. Respiratory Acidosis Correct Answer: B. Respiratory Alkalosis Excessive pulmonary ventilation decreases hydrogen ion concentration and thus causes respiratory alkalosis. It can become dangerous when it leads to cardiac dysrhythmias caused partly by a decrease in serum potassium levels. 2. 2. Question In acid-base balance, the normal plasma PCO2 and bicarbonate levels are disturbed. Match the changes in this parameter with the disorders in the given choices: High plasma PaCO2 o A. Metabolic Acidosis o B. Respiratory Alkalosis o C. Metabolic Alkalosis o D. Respiratory Acidosis Correct Answer: D. Respiratory Acidosis An excess of carbon dioxide (hypercapnia) can cause carbon dioxide narcosis. In this condition, carbon dioxide levels are so high that they no longer stimulate respirations but depress them.
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