Final answer:
The nurse would interpret a serum digoxin level of 0.4 ng/mL as below the therapeutic level. The therapeutic range for digoxin is typically between 0.5 and 2 ng/mL. The nurse should communicate this result to the healthcare provider for further evaluation and adjustment of the patient's medication regimen.
Step-by-step explanation:
The nurse would interpret a serum digoxin level of 0.4 ng/mL as below the therapeutic level. This means that the patient's current digoxin level is lower than the desired therapeutic range.
The therapeutic range for digoxin is typically between 0.5 and 2 ng/mL. Values below this range may indicate that the patient is not receiving enough of the medication to be effective.
It is important for the nurse to communicate this result to the healthcare provider for further evaluation and adjustment of the patient's medication regimen.