A patient is diagnosed with hypokalemia. After reviewing the patient's current medications, which drug should the nurse consider that might have contributed to the patient's health problem?

Narcotic.

Thiazide diuretic.

Corticosteroid.

Muscle relaxer.

Answer and Explanation

The Correct Answer is B

Choice A rationale:

Narcotics are not known to directly cause hypokalemia. Their main effects are related to pain relief and central nervous system depression.

Choice B rationale:

Thiazide diuretics can cause potassium loss in the urine, leading to hypokalemia. These diuretics work by inhibiting sodium reabsorption in the distal convoluted tubule, which can lead to potassium excretion as well.

Choice C rationale:

Corticosteroids can cause sodium and water retention but are not typically associated with significant potassium abnormalities.

Choice D rationale:

Muscle relaxers are not known to cause hypokalemia. They primarily act on the neuromuscular junction and do not directly impact potassium levels.

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Correct Answer is C

Explanation

PacO2 50 mm Hg. Choice A rationale:

Potassium levels are not directly related to respiratory acidosis. Potassium levels may be affected in certain conditions, but they are not specific indicators of respiratory acidosis.

Choice B rationale:

HCO3- (bicarbonate) levels may be elevated in metabolic alkalosis, not respiratory acidosis. In respiratory acidosis, the primary abnormality is an increased PacO2, not HCO3-.

Choice C rationale:

The partial pressure of carbon dioxide (PacO2) is a key parameter in diagnosing respiratory acidosis. In this case, a PacO2 of 50 mm Hg suggests hypoventilation and an excess of carbon dioxide in the blood, contributing to acidosis.

Choice D rationale:

The pH level given (pH 7.45) is within the normal range, which contradicts the diagnosis of respiratory acidosis. In respiratory acidosis, the pH would be expected to be below the normal range of 7.35-7.45 due to increased carbon dioxide levels.

A. Metabolic alkalosis. B. Respiratory acidosis. C. Metabolic acidosis. D. Respiratory alkalosis.

Correct Answer is B

Explanation

Respiratory acidosis.

Choice A rationale:

Metabolic alkalosis occurs when there is an increase in pH and bicarbonate (HCO₃⁻) levels, which is not the case here. The pH value in this scenario is 7.22, indicating acidosis.

Choice B rationale:

Respiratory acidosis results from the retention of carbon dioxide (PaCO₂) in the blood, leading to a decrease in pH. In this case, the pH is low (7.22), and the PacO₂ is elevated (68 mm Hg), supporting the diagnosis of respiratory acidosis.

Choice C rationale:

Metabolic acidosis is characterized by a decrease in pH and bicarbonate levels, along with a possible negative base excess. However, in this scenario, the base excess is -2, which does not indicate metabolic acidosis.

Choice D rationale:

Respiratory alkalosis occurs when there is a decrease in PaCO₂, leading to an increase in blood pH. The ABG values provided (pH 7.22, PacO₂ 68 mm Hg) are not consistent with respiratory alkalosis.

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A patient is diagnosed with hypokalemia. After reviewing the patient's current medications, which drug should the nurse consider that might have contributed to the patient's health problem?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is reviewing the laboratory values of a client who has respiratory acidosis. Which of the following findings should the nurse expect?

Correct Answer is C

Explanation

A client is admitted to the emergency room with a respiratory rate of 7/min. Arterial blood gases (ABG) reveal the following values. Which of the following is an appropriate analysis of the ABGs? pH 7.22, PacO₂ 68 mm Hg, Base excess -2, PaO₂ 78 mm Hg, Saturation 80%, Bicarbonate 26 mEq/L.

Correct Answer is B

Explanation

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