Based on the ABG results: pH 7.33, CO2: 50, HCO3: 22, what acid-base imbalance is present?
Respiratory acidosis
Metabolic acidosis
Metabolic alkalosis
Respiratory alkalosis
The Correct Answer is A
Choice A reason: Respiratory acidosis is indicated by a pH lower than the normal range (7.35-7.45), combined with a CO2 level higher than the normal range (35-45 mmHg). In this scenario, the pH is 7.33, which is slightly acidic, and the CO2 is 50, which is elevated, suggesting that the lungs are not adequately removing CO2.
Choice B reason: Metabolic acidosis is characterized by a low pH and a low HCO3 level. However, in this case, the HCO3 is normal (22-26 mEq/L), ruling out metabolic acidosis.
Choice C reason: Metabolic alkalosis would present with a high pH and a high HCO3 level. Since the pH is low, metabolic alkalosis is not the correct answer.
Choice D reason: Respiratory alkalosis is characterized by a high pH and a low CO2 level. Given that the pH is low and the CO2 is high, respiratory alkalosis is not the condition indicated by these ABG results.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Hyperventilation is a compensatory mechanism in metabolic acidosis where the body tries to decrease carbon dioxide levels to balance the acidity.
Choice B reason: Cold, clammy skin is not a typical manifestation of metabolic acidosis; it may be associated with shock or hypoglycemia.
Choice C reason: Increased blood pressure is not directly related to metabolic acidosis. It can be influenced by various factors, including stress or other underlying conditions.
Choice D reason: Bradycardia, or a slow heart rate, is not a common manifestation of metabolic acidosis. Tachycardia, or a fast heart rate, might be observed instead.
Correct Answer is C
Explanation
Choice A reason: Metabolic alkalosis is characterized by a high pH and a high HCO3 level, which is not present in this scenario.
Choice B reason: Respiratory acidosis is characterized by a high PaCO2 and a low pH. Although the pH is low here, the PaCO2 is also low, ruling out respiratory acidosis.
Choice C reason: Metabolic acidosis is indicated by a low pH and a low HCO3 level, which aligns with the patient's ABG results.
Choice D reason: Respiratory alkalosis would present with a high pH and a low PaCO2, which is not the case here.
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