A client with a myocardial infarction develops rapid heart rate, difficulty breathing, and coughs up pink, frothy sputum. What lung sound would the nurse likely hear?

1. A

   Rhonchi

2. B

   Crackles

3. C

   Quiet breath sounds

4. D

   Stridor

Appeared in: RRB Nsg Superintendent -29 April 2025 (Shift-1st)

Explanation

• The patient's symptoms (post-MI, dyspnea, pink frothy sputum) are classic for acute pulmonary edema.
• Pulmonary edema is caused by left ventricular failure, leading to fluid accumulation in the alveoli.
• Crackles (or rales) are the adventitious lung sounds produced when air moves through fluid-filled alveoli.
• These sounds are typically high-pitched, discontinuous, and heard primarily during inspiration.

Why Other Options Were Wrong

• Option A: Rhonchi are low-pitched, continuous sounds caused by secretions in the larger airways (bronchi), not fluid in the alveoli.
• Option C: Quiet or diminished breath sounds indicate decreased air movement, which is not the primary finding in pulmonary edema where fluid creates an added sound.
• Option D: Stridor is a high-pitched inspiratory sound indicating an obstruction in the upper airway (like the larynx or trachea).

Related Visual

• Visual 1: Diagram: Pathophysiology of Pulmonary Edema - A flowchart showing how left ventricular failure after an MI leads to increased pulmonary capillary pressure and fluid leakage into the alveoli.
• Visual 2: Illustration: Lung Auscultation - An image depicting the correct placement of a stethoscope for listening to lung sounds, highlighting the bases where crackles from pulmonary edema are often first heard.
• Visual 3: Audio Clip: Crackles Lung Sound - An audio file demonstrating the characteristic popping sound of crackles to help students recognize it.

Clinical Relevance

• Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Auscultation of lung sounds in acute pulmonary edema secondary to myocardial infarction in acute care settings.
• Recognizing crackles in a post-MI patient is critical as it signals the onset of acute heart failure, a medical emergency requiring immediate intervention.
• The nurse's priority actions include placing the patient upright (High-Fowler's position), administering oxygen, and preparing to give diuretics (like furosemide) and possibly vasodilators as ordered.
• Prompt reporting of these findings to the healthcare provider is essential to prevent progression to respiratory failure.

How to Approach the Question

• First, analyze the clinical scenario provided in the question stem. Identify the key patient data: a history of myocardial infarction followed by acute respiratory distress.
• Focus on the most specific and classic sign mentioned: 'coughs up pink, frothy sputum'. This is a pathognomonic sign of severe pulmonary edema.
• Connect the pathophysiology: MI leads to left heart failure, which causes fluid to back up into the lungs (pulmonary edema).
• Recall the characteristic lung sound associated with fluid in the alveoli. Air bubbling through this fluid creates crackles (rales).
• Evaluate the other options to confirm your choice. Differentiate the causes of rhonchi (large airway secretions), quiet sounds (decreased airflow), and stridor (upper airway obstruction) from the alveolar fluid of pulmonary edema.

Concept Tested & Keywords

• Concept Tested: Auscultation of lung sounds in acute pulmonary edema secondary to myocardial infarction.
• Stem keywords: myocardial infarction, rapid heart rate, difficulty breathing, pink, frothy sputum, lung sound
• Lead-in keywords: What lung sound
• Clinical cues: The combination of a recent myocardial infarction and the development of pink, frothy sputum is a hallmark sign of acute cardiogenic pulmonary edema.

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QKDN6HL6fc-SkS6Ipoq3kb

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