A nurse is caring for a client who has heart failure.
The client states she has recently been bothered by a non-productive cough.
Which of the following medications should the nurse associate with the non-productive cough?

Choice A rationale:

The client's arterial blood gas (ABG) results indicate a low pH (acidemia) and high PaCO2, which is characteristic of respiratory acidosis. Respiratory acidosis occurs when there is inadequate removal of carbon dioxide (CO2) from the body, leading to an accumulation of CO2 and a decrease in pH. In this case, the high PaCO2 (50 mm Hg) indicates that the client is retaining carbon dioxide, likely due to impaired ventilation. The normal pH range is 7.35 to 7.45, and the normal PaCO2 range is 35 to 45 mm Hg. These ABG values reflect an acid-base imbalance in the respiratory system, specifically, respiratory acidosis.

Choice B rationale:

Metabolic alkalosis is characterized by an elevated pH and an increase in bicarbonate (HCO3) levels. This is not the condition described in the client's ABG results, as the pH is low (acidemic) and HCO3 levels are within the normal range (24 mEq/L).

Choice C rationale:

Metabolic acidosis is characterized by a low pH and a decreased HCO3 level. The client's ABG results do not align with metabolic acidosis since the pH is low (acidemic) and the HCO3 level is within the normal range (24 mEq/L).

Choice D rationale:

Respiratory alkalosis is characterized by a high pH and low PaCO2. The client's ABG results do not match this condition as the pH is low (acidemic) and the PaCO2 is high (50 mm Hg), indicating respiratory acidosis. Therefore, choice A, respiratory acidosis, is the correct interpretation of the ABG results.

Choice A rationale:

Extreme thirst is not a typical finding in a client with hypokalemia. Hypokalemia is an electrolyte imbalance that can lead to symptoms like weakness and irregular heartbeats, but extreme thirst is not a direct result of low potassium levels.

Choice B rationale:

"Weak, irregular pulse" is the correct response. Hypokalemia can lead to cardiac arrhythmias, which may manifest as a weak, irregular pulse. Potassium plays a crucial role in maintaining the electrical activity of the heart, and low levels can disrupt normal heart rhythms.

Choice C rationale:

Hyperactive bowel sounds are not typically associated with hypokalemia. Instead, you might expect diminished or absent bowel sounds in severe cases due to muscle weakness.

Choice D rationale:

Hyperactive reflexes are not typically associated with hypokalemia. Instead, hypokalemia can lead to muscle weakness and potentially even paralysis in severe cases.