Final answer:
The nurse should report a serum digoxin level of 1.8 ng/mL to the provider because digoxin is a medication with a narrow therapeutic index.
Step-by-step explanation:
The nurse should report a serum digoxin level of 1.8 ng/mL to the provider.
Digoxin is a medication commonly used to treat heart failure. The therapeutic range for digoxin is typically between 0.5-2.0 ng/mL, so a level of 1.8 ng/mL falls within this range. However, it is important for the nurse to report this result to the provider because digoxin is a medication with a narrow therapeutic index, meaning that the difference between a therapeutic dose and a toxic dose is small. Monitoring the serum digoxin level regularly is crucial to ensure that the medication is effective and safe for the client.