Percussion Sounds in Respiratory Assessment

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Questions and Answers

What is resonance?

  • Over normal lungs, a high-pitch sound
  • Over normal lungs, a low-pitch sound (correct)
  • Over hyperinflated lungs
  • Over areas with high density

What is hyperresonance?

Over hyperinflated lungs, a lower, louder, and longer pitch than normal resonance.

Who might exhibit hyperresonance?

Patients with COPD, asthma, cystic fibrosis, and older patients.

What is tympany?

<p>Sound over gas in the stomach or intestines, or air in the pleural space.</p> Signup and view all the answers

What does 'dull' indicate in percussion sounds?

<p>It's sound over lungs, where liquid or solid has replaced air.</p> Signup and view all the answers

What does 'flat' describe in percussion sounds?

<p>The sound below the diaphragm where no air is present.</p> Signup and view all the answers

Describe the normal sound of resonance over the lungs.

<p>Low and short.</p> Signup and view all the answers

Why is tympany loud?

<p>Because air in a room always amplifies the sound.</p> Signup and view all the answers

Where can gas be found during percussion?

<p>Over the lungs and in the intestines.</p> Signup and view all the answers

How are 'dull' and 'resonance' sounds different?

<p>'Dull' sounds indicate solid or liquid underneath; 'resonance' indicates air.</p> Signup and view all the answers

What does it mean if a sound is super distinctive when someone speaks or whispers?

<p>It indicates liquid and tissue debris within the lungs, not just air.</p> Signup and view all the answers

Where would you typically hear a 'dull' sound?

<p>In cases of pleural effusion or increased density with atelectasis or pneumonia.</p> Signup and view all the answers

What sound progression might occur with conditions like pleural effusion or COPD?

<p>Start with hyperresonance, then progress to a dull sound.</p> Signup and view all the answers

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Study Notes

Percussion Sounds in Lung Assessment

  • Resonance: Low-pitched sound over normal lungs.
  • Hyperresonance: Lower, louder, longer pitch, indicative of hyperinflated lungs; commonly heard in patients with COPD, asthma, cystic fibrosis, and older individuals due to excess air trapped in the alveoli.

Characteristic Sounds

  • Tympany: Loud drumming sound associated with gas in the stomach, intestines, or air in the pleural space; characterized by air's sound amplification.
  • Dullness: Occurs over areas where liquid or solid replaces air; found over the liver or in cases of pneumonia (PNA); longer duration than resonance sounds.
  • Flatness: Soft, high-pitched sound below the diaphragm where there is no air present.

Distinctions Between Sounds

  • Resonance vs. Dull:
    • Resonance is produced by air in functional lung capacity.
    • Dullness arises over solid (e.g., liver) or liquid areas, indicating density increase.

Clinical Implications

  • Increased dull sounds indicate conditions like pleural effusion and atelectasis, where greater density alters normal percussion sounds.
  • Hyperresonance may evolve into dull sounds in conditions involving fluid or air buildup (e.g., pleural effusion, COPD, pneumothorax).

Speech-Induced Changes

  • Distinctive sounds during speaking or whispering may suggest the presence of fluid and tissue debris instead of air, indicating pathology.

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