Final answer:
The nurse should prioritize placing the client on a cardiac monitor, notifying the health care provider (HCP), and reviewing the client's medications.
Step-by-step explanation:
When a client with acute kidney injury has a serum potassium level of 7.0 mEq/L (7.0 mmol/L), the nurse should prioritize the following actions:
- Place the client on a cardiac monitor: Elevated potassium levels can cause cardiac arrhythmias, so monitoring the client's heart rhythm is essential.
- Notify the health care provider (HCP): The high potassium level indicates a potential medical emergency, and the HCP needs to be informed for further evaluation and intervention.
- Review the client's medications to determine if any contain or retain potassium: Certain medications can contribute to hyperkalemia, so it is important to assess the client's medication list for potential causes.