The nurse prepares to administer digoxin 0.125 mg PO to a client who has chronic heart failure. The laboratory report reveals a digoxin level of 2.5 mg/mL. Which nursing action is most appropriate at this time?
A.
Assess the apical pulse and if above 60 beats/minute administer the dose.
B.
Administer 0.25 mcg and potassium 20 mEq IV.
C.
Withhold the medication and notify the healthcare provider of the digoxin level.
D.
Administer the digoxin with a potassium supplement.
The Correct answer and Explanation is:
The correct answer is C. Withhold the medication and notify the healthcare provider of the digoxin level.
Explanation:
Digoxin is a cardiac glycoside used primarily to treat heart failure and certain arrhythmias. It increases the force of myocardial contractions and helps control heart rate. However, digoxin has a narrow therapeutic window, meaning the difference between an effective dose and a toxic dose is small. The therapeutic range for digoxin is typically between 0.5 and 2.0 ng/mL (nanograms per milliliter), and levels above this range can lead to toxicity.
In this scenario, the laboratory report indicates a digoxin level of 2.5 mg/mL, which is significantly above the therapeutic range and indicates potential digoxin toxicity. Symptoms of toxicity can include nausea, vomiting, confusion, visual disturbances (such as yellow or green halos around lights), and life-threatening arrhythmias.
The most appropriate nursing action is to withhold the medication because administering digoxin at this elevated level could exacerbate toxicity and lead to severe complications, including cardiac arrhythmias or even cardiac arrest. It is crucial to ensure patient safety by recognizing the risk posed by the high serum digoxin level.
After withholding the medication, the nurse should notify the healthcare provider immediately. This communication is vital for determining the next steps in management, which may include further assessment of the patient’s clinical status, potential adjustments in medication, or treatment of any symptoms of toxicity. Depending on the situation, the healthcare provider might also order additional tests, such as electrolyte levels (especially potassium), as hypokalemia can exacerbate digoxin toxicity.
Other options, such as assessing the apical pulse (Option A) or administering digoxin with potassium (Options B and D), are inappropriate in this context because the priority is to address the toxicity before considering further administration of digoxin or any adjunctive treatments.