👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: fluid in the lungs · flash pulmonary edema · wet lungs · water in lungs
Pulmonary Edema — medical illustration. Illustration: Servier Medical Art via Wikimedia Commons, CC BY-SA 3.0.
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Use this quick-reference guide to spot, treat, and prevent Pulmonary Edema on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
⚠️ Causes
Left-sided HF #1 cause
Fluid overload, MI, valve disease
🩺 Signs
Pink frothy sputum = classic
Crackles, dyspnea, orthopnea
Anxiety, restless, ↓ SpO2
✅ Do
High Fowler's, legs dependent
O2, morphine, furosemide IV
Nitro → ↓ preload; monitor I&O
📌 Avoid
Lying flat → worsens dyspnea
IV fluids unless ordered
📚 Pulmonary Edema — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Pulmonary edema is the accumulation of fluid in the alveoli and lung interstitium that severely impairs gas exchange, most commonly from left-sided heart failure that backs blood up into the lungs (cardiogenic). It is an acute life-threatening emergency. The hallmark is pink, frothy sputum with severe dyspnea and a sense of suffocation.
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Key points
Understand these first
Severe dyspnea, orthopnea, and pink frothy sputum are the classic signs.
Coarse crackles heard throughout the lung fields and tachypnea reflect alveolar flooding.
Anxiety, restlessness, a feeling of suffocation, and tachycardia are common.
Cool clammy skin, cyanosis, and hypoxemia develop as gas exchange fails.
The patient often sits bolt upright and gasping, and may have an S3 heart sound with cardiogenic causes.
It progresses rapidly and can lead to respiratory failure without prompt treatment.
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Nursing priorities
What to do, in order
Place the patient in high Fowler's with legs dependent to decrease venous return (preload).
Administer high-flow oxygen and prepare for noninvasive ventilation or intubation.
Give IV loop diuretics (furosemide) to reduce fluid volume as ordered.
Administer vasodilators (nitroglycerin) and morphine as ordered to reduce preload and anxiety.
BNP elevated (normal <100 pg/mL) in cardiogenic pulmonary edema
ABG: hypoxemia (PaO2 <80), early respiratory alkalosis then acidosis as it worsens
Monitor SpO2 (normal 95-100%)
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Patient teaching
What patients must know
Weigh daily at the same time and report a gain of 2 to 3 pounds in a day or 5 pounds in a week.
Follow a low-sodium diet and any prescribed fluid restriction.
Take diuretics and heart medications as prescribed and report increasing shortness of breath or swelling.
❓ Pulmonary Edema: NCLEX FAQs
What are the priority nursing interventions for Pulmonary Edema?
Place the patient in high Fowler's with legs dependent to decrease venous return (preload). Administer high-flow oxygen and prepare for noninvasive ventilation or intubation. Give IV loop diuretics (furosemide) to reduce fluid volume as ordered. Administer vasodilators (nitroglycerin) and morphine as ordered to reduce preload and anxiety.
What are the warning signs of Pulmonary Edema a nurse must report?
Pink frothy sputum with severe respiratory distress is an emergency requiring immediate intervention. Falling oxygen saturation, decreasing level of consciousness, or hypotension signal decompensation. Worsening crackles and rising respiratory rate despite treatment require rapid escalation.
What do I need to know about Pulmonary Edema for the NCLEX?
Severe dyspnea, orthopnea, and pink frothy sputum are the classic signs. Coarse crackles heard throughout the lung fields and tachypnea reflect alveolar flooding. Anxiety, restlessness, a feeling of suffocation, and tachycardia are common. Cool clammy skin, cyanosis, and hypoxemia develop as gas exchange fails.
What patient teaching is important for Pulmonary Edema?
Weigh daily at the same time and report a gain of 2 to 3 pounds in a day or 5 pounds in a week. Follow a low-sodium diet and any prescribed fluid restriction. Take diuretics and heart medications as prescribed and report increasing shortness of breath or swelling.
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Quick Tip
Severe dyspnea, orthopnea, and pink frothy sputum are the classic signs.