A nurse in a provider's office is reviewing the laboratory results of four clients who take digoxin.

Which of the following clients is at risk for developing digoxin toxicity?

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.

Choice A rationale:

Administer IV morphine. Administering IV morphine may be necessary for pain management in a client with a pulmonary embolism. However, pain relief should not take precedence over ensuring the patient's oxygenation and cardiovascular stability. Oxygen therapy is the top priority to address hypoxia and prevent further deterioration. Once oxygenation is secured, pain management can be considered.

Choice B rationale:

Start an IV infusion of lactated Ringer's. Initiating an IV infusion of lactated Ringer's solution may be important for maintaining hydration and electrolyte balance in a patient with a pulmonary embolism. However, this is not the top priority when a client is at risk of or experiencing a pulmonary embolism. Ensuring oxygenation and cardiovascular stability takes precedence. Once the patient is stable, intravenous fluids can be administered if needed.

Choice D rationale:

Initiate cardiac monitoring. Initiating cardiac monitoring is important in assessing the patient's cardiac rhythm and identifying any dysrhythmias or changes that may occur due to the pulmonary embolism. While this is a vital step, it is not the highest priority when the client is in a state of hypoxia and respiratory distress. Oxygen therapy should be the first intervention to address the immediate threat to the patient's life.