All of the following are characteristics of tracheal sound, EXCEPT:

DSSSB 13 August 2024

Nursing Foundation

Easy

Appeared in: DSSSB 13 August 2024

Explanation

The statement that inspiratory and expiratory sounds are equal is the correct answer because it is a false characteristic of tracheal sounds.
For tracheal (bronchial) breath sounds, the expiratory phase is characteristically longer, louder, and higher-pitched than the inspiratory phase, often with a 2:3 ratio.
An equal inspiratory and expiratory phase is the defining feature of bronchovesicular breath sounds, which are heard over the mainstem bronchi, not the trachea.

Option A: This is a true characteristic. Tracheal sounds are generated by turbulent air moving through the large-diameter trachea, resulting in sounds that are loud and high-pitched.
Option B: This is a true characteristic. By definition, tracheal breath sounds are auscultated directly over the trachea in the anterior neck.
Option C: This is a true and defining characteristic of tracheal (bronchial) sounds. The expiratory phase is longer than the inspiratory phase.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Characteristics of normal breath sounds, specifically tracheal (bronchial) sounds as background academic context rather than a clinical decision trigger.
Accurate identification of breath sounds is a fundamental nursing skill for respiratory assessment. Misidentifying sounds can lead to missed diagnoses or incorrect interventions.
Hearing bronchial (tracheal-like) sounds in the peripheral lung fields where vesicular sounds are expected is an abnormal finding. It suggests lung consolidation, as seen in conditions like pneumonia, where fluid or solid tissue replaces air-filled lung space.
What if? If a nurse auscultates loud, high-pitched sounds with a long expiratory phase over the base of the left lung, the priority action is not to document it as normal. The nurse should suspect an abnormality like pneumonia or atelectasis, document the finding, and notify the healthcare provider for further evaluation.

How to Approach the Question

First, identify the negative keyword 'EXCEPT'. This signals that three of the options are true statements about tracheal sound, and your task is to find the one false statement.
Recall the key properties of the main types of normal breath sounds: tracheal (bronchial), bronchovesicular, and vesicular.
Focus on the characteristics of tracheal sound: location (over the trachea), pitch (high), loudness (loud), and the relationship between inspiration and expiration.
Evaluate each option against these known facts. Tracheal sounds are loud, high-pitched, and heard over the trachea, with expiration being longer than inspiration.
Option A, B, and C are all true characteristics.
Option D states that the phases are equal. This is the characteristic of bronchovesicular sounds, not tracheal sounds, making it the false statement and the correct answer.

Concept Tested & Keywords

Concept Tested: Characteristics of normal breath sounds, specifically tracheal (bronchial) sounds.
Stem keywords: tracheal sound, characteristics, auscultation
Lead-in keywords: EXCEPT
Negative lead-in flag: The question asks for the exception, meaning the statement that is NOT a true characteristic of tracheal sound.

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E6 Nursing Fundamentals Potter Perry 12e Part 3 p. 95-97

E6 Nursing Fundamentals Taylor p. 376-378