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Percussion of the thorax reveals a dull sound. The nurse interprets this to indicate which of the following?

A.

An air-filled structure

B.

A bony structure

C.

Emphysematous tissue

D.

Fluid or a solid mass

Answer and Explanation

The Correct Answer is D

Percussion is a valuable technique during a physical assessment, especially of the thorax, to determine the underlying structures’ density and composition. Each type of tissue-air-filled, fluid-filled, solid, or bony-produces a distinct percussion sound.

Rationale for correct answer:

4. Fluid or a solid mass: A dull sound on thoracic percussion indicates the presence of fluid (e.g., pleural effusion) or a solid mass (e.g., tumor, consolidated lung as in pneumonia).

Rationale for incorrect answers:

1. An air-filled structure: Air-filled lung tissue produces a resonant sound, which is low-pitched and hollow-not dull.

2. A bony structure: Bone produces a flat sound-very soft and high-pitched-because it is extremely dense and lacks air.

3. Emphysematous tissue: Emphysema causes hyperresonance due to trapped air and overdistended alveoli. This is a loud, lower-pitched sound-not dull.

Take home points:

  • A dull sound during thoracic percussion often signals the presence of fluid or solid tissue, such as in pneumonia, tumors, or pleural effusion.
  • Knowing the characteristic percussion sounds-resonance (air), dullness (fluid/solid), flatness (bone), tympany (gas)-helps nurses detect underlying thoracic abnormalities early.


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Related Questions

Correct Answer is A

Explanation

Auscultation of the lungs is a vital component of respiratory assessment. Breath sounds are classified as normal (e.g., vesicular, bronchial, bronchovesicular) or abnormal (adventitious).

Rationale for correct answer:

1. Adventitious breath sounds are abnormal lung sounds that include crackles (rales), wheezes, rhonchi, and pleural friction rubs. Coarse gurgling sounds heard on expiration are typically rhonchi.

Rationale for incorrect answers:

2. Bronchovesicular breath sounds: These are normal breath sounds heard over the mainstem bronchi. They are moderate in pitch and intensity, with equal inspiration and expiration.

3. Vesicular breath sounds: These are soft, low-pitched normal sounds heard over most of the lung fields. Inspiration is longer than expiration, and no gurgling or harshness is present.

4. Bronchial sounds: These are harsh, high-pitched normal sounds heard over the trachea. Expiration is longer than inspiration.

Take home points:

  • Adventitious breath sounds are abnormal and include rhonchi, which sound like coarse gurgling or snoring and often indicate secretions in the airways.
  • Differentiating normal from abnormal lung sounds is essential for identifying respiratory problems and guiding timely interventions.

Correct Answer is A

Explanation

Breast assessment is an essential part of a comprehensive physical examination, especially for early detection of abnormalities such as lumps, cysts, or signs of breast cancer.

Rationale for correct answer:

1. Quadrants: The breast is commonly divided into four quadrants (upper outer, upper inner, lower outer, lower inner) and the tail of Spence (which extends into the axilla) during physical examination. This division facilitates a systematic approach to palpation.

Rationale for incorrect answers:

2. Halves: Dividing the breast into halves (e.g., right/left or top/bottom) is not standard practice. This method is too vague and lacks clinical specificity when locating findings.

3. Entire breast tissue: While it is essential to palpate the entire breast, this option does not describe how the breast is divided during palpation.

4. Bilateral comparison: While comparing one breast to the other is important to assess symmetry or detect abnormalities, this is not how a single breast is divided during palpation.

Take home points:

  • Dividing the breast into quadrants and assessing the tail of Spence ensures a systematic and thorough breast exam.
  • Precise anatomical terminology in assessments supports early detection and treatment of breast abnormalities.

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