A 72-year-old patient with a history of ischemic cardiomyopathy is admitted to the medical unit with acute exacerbation. The patient presents with severe dyspnea, orthopnea, and frothy pink sputum. Vital signs: BP 170/100 mmHg, HR 105 bpm, RR 30/min, O2 sat 85% on room air. The patient is started on oxygen therapy and IV furosemide. After 4 hours of treatment, which nursing intervention should be the priority?
1Increase the oxygen flow rate to improve saturation
2Administer prescribed PRN morphine for dyspnea relief
3Encourage the patient to perform deep breathing exercises
4Assess urine output and daily weight to evaluate diuretic effectiveness✓ 정답
해설
After 4 hours of diuretic therapy, assessing urine output and weight is priority to evaluate fluid removal effectiveness in heart failure. Other options like increasing oxygen or administering morphine may be needed but depend on this assessment first.
Core Nursing ExplanationKey Concept Analysis: This question tests the nurse's ability to prioritize interventions for a patient with acute decompensated heart failure (ADHF) after initial treatment has been administered. The core principle is evaluating the effectiveness of a primary intervention (diuretic therapy) before escalating or adding other therapies. The patient is in pulmonary edema, a life-threatening complication of left-sided heart failure, characterized by the classic symptoms of dyspnea, orthopnea, and pink, frothy sputum. The immediate treatment goals are to reduce preload (with diuretics like furosemide), reduce afterload (often with vasodilators), and improve oxygenation.
Answer Rationale: Key Point! The priority nursing intervention after 4 hours of IV furosemide therapy is to assess its effectiveness. Furosemide is a loop diuretic that promotes the excretion of sodium and water, thereby reducing intravascular volume and pulmonary congestion. The most direct and objective measures of diuretic effectiveness are urine output and daily weight. A significant increase in urine output (e.g., >0.5-1 mL/kg/hr) and a decrease in weight indicate successful fluid removal, which is the pathophysiological goal of treating the pulmonary edema. Without this assessment, the nurse cannot determine if the current treatment is working or if more aggressive interventions are needed.
Distractor Analysis:
Watch out for confusion! Option ① (Increase oxygen flow rate) addresses the symptom (hypoxemia) but not the cause. While oxygenation is critical, the patient's saturations must be monitored, but blindly increasing oxygen without assessing the response to the diuretic that is treating the root cause (fluid overload) is not the priority evaluation step. Furthermore, in patients with chronic COPD (Chronic Obstructive Pulmonary Disease), uncontrolled high-flow oxygen can depress the respiratory drive, though that is not the primary concern here.
Option ② (Administer PRN morphine) is an older adjunctive therapy for pulmonary edema. Morphine can reduce anxiety, dyspnea, and preload through venodilation. However, its use has become more controversial due to risks of respiratory depression and is not a first-line priority over evaluating the core treatment. It would only be considered if the patient remains severely distressed after assessing that diuresis is inadequate.
Option ③ (Encourage deep breathing exercises) is inappropriate during an acute exacerbation. The patient is in severe respiratory distress (RR 30/min, O2 sat 85%). Encouraging deep breathing exercises would be exhausting and ineffective. This intervention is more suitable for postoperative patients or those with atelectasis, not for someone in active pulmonary edema.
Related Concepts: This scenario integrates the nursing process, specifically the Evaluation phase. After implementing a plan (administering furosemide), the nurse must evaluate the patient's response. It also highlights the difference between treating a symptom (low O2 sat) and evaluating the treatment for the underlying problem (fluid overload). Effective diuresis will ultimately improve oxygenation more sustainably than simply turning up the oxygen.
Concept Summary
Concept
Description
Clinical Relevance
Acute Decompensated Heart Failure (ADHF)
Sudden worsening of HF symptoms, often pulmonary edema.
Medical emergency requiring rapid diuresis and afterload reduction.
Pulmonary Edema
Fluid accumulation in the alveoli due to left ventricular failure.
Manifests as severe dyspnea, orthopnea, crackles, pink frothy sputum.
Loop Diuretic (Furosemide)
Acts on loop of Henle to excrete Na+, Cl-, and water.
First-line drug for fluid removal in ADHF. Effectiveness measured by urine output and weight loss.
Nursing Priority (Evaluation)
Assessing response to a primary intervention before proceeding.
In ADHF, evaluate diuretic effect before adding other symptomatic treatments.
Side-by-Side Comparison!
Intervention
When it's a Priority
When it's NOT the Priority (like in this case)
Assess Urine Output/Weight
After administering a diuretic for fluid overload.
When the primary problem is not fluid overload (e.g., anaphylaxis, hemorrhage).
Increase Oxygen
Immediately upon finding severe hypoxemia (O2 sat < 90%) as a life-saving measure.
After initial stabilization, when the cause of hypoxemia (fluid) is being treated and needs evaluation.
Administer Morphine
For severe anxiety/pain in specific contexts (MI, palliative care) or as an adjunct if diuresis is insufficient and patient remains in extreme distress.
As a first-line or routine treatment for pulmonary edema without prior assessment of diuretic response.
Anatomy, Physiology & Pharmacology PointsPathophysiology: In ischemic cardiomyopathy, the weakened left ventricle cannot pump effectively, causing a backup of pressure into the left atrium and pulmonary veins. This increased hydrostatic pressure forces fluid out of the capillaries and into the alveoli, impairing gas exchange. Pharmacology: Furosemide (Lasix) inhibits the Na+/K+/2Cl- symporter in the thick ascending limb of the loop of Henle. This blocks sodium reabsorption, creating an osmotic force that pulls water into the urine. Key Point! Onset of IV furosemide is within 5 minutes, peak effect at 30 minutes, and duration is about 2 hours. Assessing output after 4 hours evaluates the cumulative effect.
Memory Tips
Think "DUKE" for Diuretic Evaluation in HF: Daily weight, Urine output, Know electrolytes (monitor for hypokalemia), Evaluate lung sounds and breathing.
Priority Rule: After you give a treatment for the cause, you must check if it worked before doing more things for the symptoms.
High-Frequency NCLEX Topics
Evaluating diuretic effectiveness is a core NCLEX concept. The exam frequently tests:
1. Knowing the expected outcomes of heart failure medications.
2. Prioritization based on the nursing process (assessment/evaluation vs. implementation).
3. Recognizing the signs of effective vs. ineffective treatment for fluid overload.
Watch Out for Question Variations!
The same concept can be tested differently:
Symptom Identification: "Which finding indicates the furosemide is effective?" (Answer: Increased urine output, decreased crackles, weight loss).
Complication Recognition: "The patient on IV furosemide has produced 50 mL of urine in 4 hours. What is the nurse's priority action?" (Answer: Notify the provider of ineffective diuresis; prepare for possible next steps like a diuretic drip).
Patient Education: "What will you teach the patient is the best way to monitor fluid status at home?" (Answer: Daily weight measurement on the same scale each morning).
Nursing Clinical Practice GuideClinical Scenario: You are the nurse on a medical-surgical floor. Mr. Johnson, 72, was admitted 4 hours ago with acute shortness of breath. He was started on 40 mg IV furosemide and 4 L/min oxygen via nasal cannula. He is now calling out, still feeling short of breath.
Nursing Intervention Strategy:
1Assessment FirstBefore adjusting anything, perform a focused assessment.
* Vital Signs & O2 Sat: Recheck BP, HR, RR, O2 saturation. Compare to baseline.
* Respiratory: Auscultate lung sounds. Are the bibasilar crackles improving? Listen for wheezes (cardiac asthma).
* Cardiac: Assess JVD (Jugular Venous Distension), heart sounds (S3 gallop?).
* Renal/Volume: Check the urinary catheter output or offer a urinal/bedpan. Calculate the hourly and total output since the furosemide was given. Check for dependent edema.
2Evaluate & Act* If urine output is robust (e.g., >500 mL in 4 hours) and lung sounds are clearer, the diuretic is working. Continue monitoring, reassure the patient, and document the positive response.
* If urine output is scant (<100 mL in 4 hours), the patient is not responding. This is a critical finding. Notify the provider immediately. The patient may need a higher diuretic dose, a continuous infusion, or additional therapies (e.g., nitroglycerin, nesiritide).
3Patient Safety and Precautions* Electrolytes: IV furosemide causes significant potassium loss. Monitor serum potassium levels (hypokalemia can cause lethal arrhythmias).
* Renal Function: Monitor BUN and creatinine. Ineffective diuresis may indicate worsening renal function (cardiorenal syndrome).
* Ototoxicity: With rapid IV administration, furosemide can cause hearing loss. Administer IV push slowly (over 1-2 minutes per guideline).
Nursing Procedure & Medication FlowAdministering IV Furosemide & Follow-up:
1. Verify order, patient, and allergies.
2. Obtain baseline weight, lung sounds, vital signs.
3. Administer IV dose slowly (per hospital protocol, often over 1-2 minutes) to avoid ototoxicity.
4. Place a urinal or bedside commode within easy reach. Anticipate rapid diuresis.
5.Initiate strict I&O (Intake and Output) monitoring. Mark the time of administration.
6. Reassess lung sounds, respiratory effort, and vital signs in 30-60 minutes.
7. At the 2-4 hour mark, calculate total urine output and compare to intake. Weigh the patient the next morning.
8. Monitor for signs of hypokalemia (muscle weakness, cramps, ECG changes) and dehydration (tachycardia, orthostatic hypotension).
A Word from Your Senior Nurse
"In the chaos of an acute heart failure admission, it's easy to get caught up in tasks. Remember, your brain is your most important tool. After you've given that potent IV Lasix, don't just move on to the next medication. Pause and think, 'Is it working?' The answer isn't just in the order set; it's in the patient's body—in the urine bag, on the scale, and in their lungs. That moment of evaluation is what separates task-based care from true nursing. On the NCLEX and at the bedside, always link your action to its purpose and its outcome."
Acute Decompensated Heart Failure — Sudden worsening of heart failure signs and symptoms, typically requiring urgent treatment. Often presents as pulmonary edema.
Pulmonary Edema — Life-threatening accumulation of fluid in the alveoli and interstitial spaces of the lungs, most commonly due to left ventricular failure.
Furosemide — A loop diuretic that inhibits sodium reabsorption in the loop of Henle, promoting excretion of water and electrolytes. First-line for fluid removal in ADHF.
Orthopnea — Shortness of breath that occurs when lying flat, relieved by sitting up or standing. A classic symptom of left-sided heart failure.
Intake and Output (I&O) — The measurement of all fluid entering (IV, oral) and leaving (urine, emesis, drainage) a patient's body. Critical for managing fluid balance.