A nurse is reviewing the laboratory results of a client who was hyperventilating during a panic attack.
Which of the following arterial blood gas values should the nurse expect?

pH 7.50 and HCO3 31 mm Hg.

pH 7.30 and HCO3 19 mm Hg.

pH 7.47 and PaCO2 31 mm Hg.

pH 7.32 and PaCO2 50 mm Hg.

Answer and Explanation

The Correct Answer is C

The correct answer is: C.

Choice A reason: A pH of 7.50 and HCO3 of 31 mm Hg suggest a metabolic alkalosis due to the high bicarbonate level. However, during a panic attack, hyperventilation leads to respiratory alkalosis, not metabolic, due to the excessive exhalation of CO2, which is not consistent with this option.

Choice B reason: A pH of 7.30 and HCO3 of 19 mm Hg indicate a metabolic acidosis due to the low bicarbonate level. This is not typically associated with hyperventilation during a panic attack, which usually causes respiratory alkalosis, characterized by a decrease in CO2 levels and an increase in pH.

Choice C reason: A pH of 7.47 and PaCO2 of 31 mm Hg are indicative of respiratory alkalosis, which is expected during hyperventilation as a result of a panic attack. Hyperventilation causes a decrease in carbon dioxide (PaCO2) levels, leading to an increase in pH. The normal ranges for arterial blood gases are: pH 7.35-7.45, PaCO2 35-45 mm Hg, and HCO3 22-26 mEq/L.

Choice D reason: A pH of 7.32 and PaCO2 of 50 mm Hg suggest respiratory acidosis due to the elevated PaCO2 level. This would be more consistent with hypoventilation, which is not the case during a panic attack where hyperventilation occurs.

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Correct Answer is D

Explanation

Choice A rationale:

A respiratory rate of 9/min and shallow respirations are indicative of hypoventilation, which can lead to an accumulation of carbon dioxide (CO2) in the blood. This condition results in respiratory acidosis (Choice D). In respiratory acidosis, the arterial pH is decreased (acidic) while the PaCO2 (partial pressure of carbon dioxide) is elevated.

Choice B rationale:

Respiratory alkalosis (Choice B) is characterized by a low PaCO2 and an elevated pH due to hyperventilation. Shallow respirations and a respiratory rate of 9/min do not align with this condition, as it typically involves rapid and deep breathing.

Choice C rationale:

Metabolic alkalosis (Choice C) results from a primary excess of bicarbonate (HCO3-) in the blood and is not associated with the given respiratory patterns. Shallow respirations and a low respiratory rate are more likely to lead to an accumulation of CO2, causing respiratory acidosis (Choice D).

Choice D rationale:

The correct answer is choice D. Shallow respirations and a respiratory rate of 9/min indicate hypoventilation, leading to an accumulation of CO2 in the blood. This condition results in respiratory acidosis, where the arterial pH is decreased. The body's compensatory response is to retain bicarbonate to normalize pH, but this can result in an elevated HCO3- level. The primary acid-base imbalance in this case is respiratory acidosis. .

A. "A headache indicates tolerance to the medication.”. B. "It sounds as if you are allergic to this medication.”. C. "A headache is a common adverse effect of this medication, but it will probably occur less often over time.”. D. "Your headache is probably a result of anxiety about the chest pain.”.

Correct Answer is C

Explanation

Choice A rationale:

Tolerance to nitroglycerin is not indicated by the presence of a headache. Nitroglycerin is a vasodilator used to relieve angina, and headaches can be a common side effect.

Choice B rationale:

Allergic reactions to nitroglycerin are rare, and a headache is not a typical symptom of an allergy to this medication.

Choice C rationale:

"A headache is a common adverse effect of this medication, but it will probably occur less often over time.”. This is the correct response. Nitroglycerin commonly causes headaches due to its vasodilatory effects. Patients often experience this side effect initially, but it tends to improve or occur less frequently with continued use. The nurse should educate the client about this and reassure them that the headaches should diminish over time.

Choice D rationale:

Anxiety may exacerbate chest pain, but it is not the likely cause of the headache. It is important to address the headache as a potential side effect of the medication.

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A nurse is reviewing the laboratory results of a client who was hyperventilating during a panic attack. Which of the following arterial blood gas values should the nurse expect?

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Naxlex Comprehensive Predictor Exams

A nurse is collecting data from a client who has shallow respirations and a respiratory rate of 9/min.Which of the following acid-base imbalances should the nurse expect?

Correct Answer is D

Explanation

A nurse administered nitroglycerin sublingually to a client who has angina pectoris and experienced chest pain.The client states that his chest pain is relieved but now he has a headache.Which of the following responses by the nurse is appropriate?

Correct Answer is C

Explanation

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A nurse is reviewing the laboratory results of a client who was hyperventilating during a panic attack.
Which of the following arterial blood gas values should the nurse expect?