Today’s question focuses on priority action in a medication safety situation. This matters in real nursing because many patient problems are not caused by a disease alone, but by how the body responds to treatment. A safe nurse does not just give a drug and move on. The nurse notices early warning signs, connects them to the medication, and acts before the patient gets worse.
Clinical Scenario
You are caring for a 72-year-old man on a medical-surgical unit who was admitted with fluid volume overload related to heart failure. His history includes chronic kidney disease stage 3, hypertension, and type 2 diabetes. He received furosemide 40 mg IV 2 hours ago.
During reassessment, the patient says, “My heart feels jumpy, and I’m weak when I try to sit up.” He is alert and oriented. His vital signs are: temperature 36.8 C, heart rate 108/min and irregular, respiratory rate 20/min, blood pressure 104/62 mm Hg, and oxygen saturation 95% on room air. He has had 1400 mL of urine output since receiving the medication. Morning lab results now available show potassium 2.9 mEq/L, sodium 136 mEq/L, creatinine 1.8 mg/dL, and magnesium 1.7 mg/dL.
The Question
What is the nurse’s priority action?
Answer Choices
- Place the patient in high-Fowler position and encourage slow deep breathing.
- Notify the provider of the findings and anticipate potassium replacement and cardiac monitoring.
- Offer the patient oral fluids to reduce weakness and repeat the blood pressure in 30 minutes.
- Administer the next scheduled dose of furosemide early to improve fluid removal.
Correct Answer
B. Notify the provider of the findings and anticipate potassium replacement and cardiac monitoring.
Detailed Rationale
This patient is showing signs of symptomatic hypokalemia after IV furosemide. The key clues are not subtle. He has a potassium level of 2.9 mEq/L, reports weakness, and has an irregular rapid heart rate with palpitations. Furosemide is a loop diuretic, and it increases urinary loss of potassium. The large urine output after the dose supports that the drug had a strong effect.
The nurse’s priority is to recognize that this is now more than just an abnormal lab value. It is a patient safety problem with cardiac risk. Low potassium can disturb electrical conduction in the heart and lead to dysrhythmias. That matters even more in an older adult with heart failure and kidney disease, because his physiologic reserve is lower and complications can develop quickly.
The nurse should first assess the patient’s current status carefully. That includes confirming the symptoms, checking apical pulse quality, reviewing telemetry if available, asking about chest discomfort or worsening dizziness, and reviewing recent urine output and medication timing. The nurse should also look at related labs. Magnesium matters here because low or low-normal magnesium can make potassium replacement less effective and can also increase dysrhythmia risk.
After recognizing the pattern, the nurse should notify the provider promptly. The provider will likely order potassium replacement, and possibly magnesium replacement depending on the full clinical picture. Because the patient is already symptomatic and has an irregular pulse, cardiac monitoring is important. The nurse should continue close monitoring of heart rhythm, blood pressure, muscle strength, and any worsening symptoms such as chest pain, increasing palpitations, or confusion.
The nurse should also expect changes in the medication plan. Another dose of furosemide may need to be delayed or adjusted until the electrolyte imbalance is addressed. This is why NCLEX questions like this test whether you can connect assessment data to the next safest action, not just name a side effect.
Why the Other Options Are Wrong
A. Place the patient in high-Fowler position and encourage slow deep breathing.
This may help a patient with dyspnea, but it does not address the actual priority problem. The patient’s oxygen saturation is acceptable, and the scenario points to electrolyte-related cardiac instability, not primary respiratory distress. Positioning is not harmful, but it is incomplete and delays the needed intervention.
C. Offer the patient oral fluids to reduce weakness and repeat the blood pressure in 30 minutes.
Weakness in this case is most likely related to hypokalemia, not simple dehydration. Also, a patient with heart failure should not be encouraged to take extra fluids without considering fluid restrictions and volume status. Waiting 30 minutes is unsafe when the patient already has symptoms and an irregular heart rate.
D. Administer the next scheduled dose of furosemide early to improve fluid removal.
This is the least safe option. The patient has already had a strong diuretic response and now has evidence of a serious electrolyte loss. Giving more furosemide could worsen hypokalemia, increase weakness, and raise the risk of dangerous dysrhythmias. Good nursing judgment means stopping and reassessing when treatment begins causing harm.
Key Takeaways
- Loop diuretics like furosemide can cause significant potassium loss.
- Hypokalemia becomes urgent when the patient has symptoms such as weakness, palpitations, or an irregular pulse.
- Do not treat the lab value alone. Connect the number to what the patient is showing you.
- Cardiac monitoring matters when low potassium is affecting heart rhythm.
- Always review related data: urine output, kidney function, magnesium, vital signs, and recent medication doses.
- On shift mini-checklist:
- Reassess symptoms and pulse quality.
- Review potassium, magnesium, creatinine, and recent urine output.
- Hold or question medications that may worsen the imbalance if appropriate.
- Notify the provider promptly with clear, organized data.
- Monitor for worsening dysrhythmias, hypotension, and increasing weakness.
Quick Practice Extension
1. If this patient also reported new muscle cramps and the telemetry showed frequent premature ventricular contractions, what finding would make the situation even more urgent?
2. After potassium replacement is started, which reassessment findings would tell you the patient is improving, and which would mean you need to escalate care?
Category used today: Pharmacology
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