Interpret the following arterial blood gas: pH 7.43: HCO3 35: Paco 46.
Respiratory acidosis.
Respiratory alkalosis.
Metabolic acidosis.
Metabolic alkalosis.
The Correct Answer is D
Choice A rationale
Respiratory acidosis is characterized by a pH less than 7.35 and a PaCO2 greater than 454. In this case, the pH is 7.43, which is within the normal range, and the PaCO2 is 46, which is slightly above the normal range. Therefore, this does not indicate respiratory acidosis.
Choice B rationale
Respiratory alkalosis is characterized by a pH greater than 7.45 and a PaCO2 less than 354. In this case, the pH is 7.43, which is within the normal range, and the PaCO2 is 46, which is slightly above the normal range. Therefore, this does not indicate respiratory alkalosis.
Choice C rationale
Metabolic acidosis is characterized by a pH less than 7.35 and a HCO3 less than 224. In this case, the pH is 7.43, which is within the normal range, and the HCO3 is 35, which is above the normal range. Therefore, this does not indicate metabolic acidosis.
Choice D rationale
Metabolic alkalosis is characterized by a pH greater than 7.45 and a HCO3 greater than 264. In this case, the pH is 7.43, which is within the normal range, and the HCO3 is 35, which is above the normal range. Therefore, this indicates metabolic alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The nurse completed the incident report at 1600.
Step 1 is to understand the 24-hour clock format. In this format, the hours of the day run 0-23, midnight to midnight.
Step 2 is to convert the time the nurse administered the medication (0900) to the 12-hour clock format. This is 9 a.m.
Step 3 is to add seven hours to this time (the time that passed before the nurse realized a medication error had occurred). 9 a.m. + 7 hours = 4 p.m.
Step 4 is to convert this time back to the 24-hour clock format. 4 p.m. is 1600 in the 24-hour clock format.
Correct Answer is D
Explanation
Choice A rationale
Respiratory acidosis is characterized by a pH less than 7.35 and a PaCO2 greater than 454. In this case, the pH is 7.43, which is within the normal range, and the PaCO2 is 46, which is slightly above the normal range. Therefore, this does not indicate respiratory acidosis.
Choice B rationale
Respiratory alkalosis is characterized by a pH greater than 7.45 and a PaCO2 less than 354. In this case, the pH is 7.43, which is within the normal range, and the PaCO2 is 46, which is slightly above the normal range. Therefore, this does not indicate respiratory alkalosis.
Choice C rationale
Metabolic acidosis is characterized by a pH less than 7.35 and a HCO3 less than 224. In this case, the pH is 7.43, which is within the normal range, and the HCO3 is 35, which is above the normal range. Therefore, this does not indicate metabolic acidosis.
Choice D rationale
Metabolic alkalosis is characterized by a pH greater than 7.45 and a HCO3 greater than 264. In this case, the pH is 7.43, which is within the normal range, and the HCO3 is 35, which is above the normal range. Therefore, this indicates metabolic alkalosis.
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