Medication Administration in a Client with Heart Failure
Mr. Adams, a 68-year-old male with a history of heart failure (ejection fraction 30%), hypertension, and chronic kidney disease (stage 3), is admitted with worsening shortness of breath and edema. His current medications include furosemide 40 mg PO daily, carvedilol 6.25 mg PO BID, lisinopril 10 mg PO daily, and spironolactone 25 mg PO daily. His vital signs are: BP 102/64, HR 58, RR 22, SpO2 92% on 2 L nasal cannula. His labs show potassium 5.2 mEq/L, sodium 134 mEq/L, BUN 32 mg/dL, creatinine 2.1 mg/dL. The LPN is preparing to administer the morning medications.
1. Which of Mr. Adams' medications should the LPN question administering? Provide a rationale for each.
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Medications to question:
- Spironolactone: Potassium is elevated at 5.2 mEq/L (normal 3.5-5.0). Spironolactone is a potassium-sparing diuretic and can further increase potassium, risking hyperkalemia and cardiac arrhythmias. Also, with CKD, potassium excretion is impaired. The LPN should hold the spironolactone and notify the provider.
- Lisinopril: An ACE inhibitor that can also increase potassium and worsen renal function. With potassium 5.2 and creatinine elevated, lisinopril may need dose adjustment or discontinuation. The LPN should question this order.
- Carvedilol: A beta-blocker that can lower heart rate and blood pressure. HR is 58 (bradycardia) and BP is 102/64 (low-normal). The LPN should hold carvedilol if HR <60 or if symptomatic, and notify the provider.
Furosemide: May be safe to administer as it promotes potassium excretion, but monitor potassium and renal function. However, with low BP, assess for hypovolemia.
Rationale: The LPN must protect the client from medication errors by recognizing contraindications and abnormal lab values. Hyperkalemia is a serious risk with spironolactone and ACE inhibitors in CKD.
2. What additional assessments and interventions should the LPN perform before administering the medications?
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Assessments and interventions:
- Vital signs: Recheck BP and HR. If HR <60 or BP <90/60, hold carvedilol and notify provider. Assess for symptoms of hypotension (dizziness, fatigue) and bradycardia.
- Laboratory values: Review potassium, sodium, BUN, creatinine, and magnesium. Note trends. Report critical values (K+ >5.0) to provider.
- Fluid status: Assess for edema, lung sounds, weight, and intake/output. Furosemide may be needed for congestion, but monitor for dehydration and hypotension.
- Renal function: With CKD, monitor for worsening renal function. Avoid nephrotoxic drugs.
- Medication reconciliation: Verify doses, frequencies, and allergies. Check for drug interactions (e.g., ACE inhibitor + potassium-sparing diuretic).
- Client education: Teach the client about signs of hyperkalemia (muscle weakness, palpitations) and hypotension (dizziness). Instruct to report these.
- Documentation: Document all findings and communications with the provider.
Rationale: Thorough assessment before medication administration prevents adverse events. The LPN must use clinical judgment to prioritize safety.