Interpret the following arterial blood gas: pH 7.43: HCO3 35: Paco 46.

Respiratory acidosis.

Respiratory alkalosis.

Metabolic acidosis.

Metabolic alkalosis.

Answer and Explanation

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.

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Correct Answer is B

Explanation

Choice B rationale
A potassium level of 6.4 mmol/K is above the normal range (3.5-5.0 mmol/L) and can be life- threatening. High potassium levels can lead to dangerous heart rhythms.

A. Between the fourth and fifth intercostal space. B. Between the third and fourth intercostal space. C. Between the second and third intercostal space. D. Between the first and second intercostal space.

Correct Answer is A

Explanation

Choice A rationale
The apical pulse is located at the fifth intercostal space at the left midclavicular line.

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Interpret the following arterial blood gas: pH 7.43: HCO3 35: Paco 46.

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Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is A

Explanation

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