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 A

Explanation

Choice A rationale
During systole, the ventricles contract to pump blood out of the heart to the body and lungs.
Choice B rationale
The ventricles relax during diastole, not systole.
Choice C rationale
The atria also contract during systole, but this occurs just before ventricular systole.
Choice D rationale
This choice is incorrect because both the ventricles and the atria contract during systole.

A. Bradypnea. B. Hyperpnea. C. Kussmal’s Respirations. D. Cheyne-Stokes Respirations.

Correct Answer is D

Explanation

Choice D rationale
Cheyne-Stokes respirations, a pattern of breathing characterized by a gradual increase in depth and sometimes in rate to a maximum depth, followed by a decrease resulting in apnea, are commonly observed in patients nearing the end of life.

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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

What events take place during systole? Select all that apply.

Correct Answer is A

Explanation

The nurse is assessing a patient being cared for at the end of life. Which of the following respiratory patterns would be expected?

Correct Answer is D

Explanation

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