A high-pitched harsh sound heard during inspiration is known as?

NORCET 2 - 2021 (shift-1)

Medical Surgical Nursing

Easy

Appeared in: NORCET 2 - 2021 (shift-1)

Explanation

Stridor is defined as a high-pitched, harsh, monophonic (single-note) sound heard primarily during inspiration.
This sound is generated by turbulent airflow passing through a narrowed or partially obstructed upper airway, specifically the larynx or trachea.
Its distinct harsh and inspiratory nature differentiates it from other breath sounds like wheezing, which is typically musical and expiratory, or rales, which are discontinuous popping sounds.

Option A: Rhonchi are low-pitched, coarse, snoring, or gurgling sounds, not high-pitched and harsh. They are caused by secretions in the larger airways.
Option C: Wheezing is a high-pitched sound, but it is described as 'musical' or 'whistling,' not 'harsh.' It is also predominantly heard during expiration due to lower airway narrowing.
Option D: Rales (also known as crackles) are discontinuous, brief, popping sounds, similar to Velcro being pulled apart. They are not the continuous, harsh sound described in the question.

Visual 1: Infographic - A comparative table of adventitious breath sounds (Stridor, Wheeze, Rhonchi, Rales) detailing their pitch, timing (inspiratory/expiratory), quality, and underlying cause.
Visual 2: Diagram - An anatomical illustration showing the upper and lower respiratory tracts, highlighting the location of obstruction for stridor (larynx/trachea) versus wheezing (bronchioles).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification and differentiation of adventitious breath sounds as background academic context rather than a clinical decision trigger.
The ability to accurately identify stridor is a critical nursing skill, as it signals a potential airway emergency requiring immediate assessment and intervention to prevent respiratory failure.
Differentiating stridor (upper airway) from wheezing (lower airway) is vital for guiding appropriate treatment. For example, stridor may require interventions like racemic epinephrine or securing the airway, while wheezing is treated with bronchodilators.
What if? - If the sound was described as a 'low-pitched snoring sound that clears with coughing,' the correct answer would be Rhonchi, and the nursing priority would be to encourage coughing and deep breathing or perform suctioning to clear secretions.

How to Approach the Question

Step 1: Deconstruct the question stem to identify the key descriptors of the sound: 'high-pitched,' 'harsh,' and 'during inspiration.'
Step 2: Systematically review the definitions of each option provided.
Step 3: Compare the characteristics of each option with the descriptors from the stem.
Step 4: Eliminate options that do not match. 'Rhonchi' is low-pitched. 'Wheezing' is musical and primarily expiratory. 'Rale' is a popping/crackling sound.
Step 5: Conclude that 'Stridor' is the only term that accurately fits all three descriptors: high-pitched, harsh, and inspiratory, indicating an upper airway obstruction.

Concept Tested & Keywords

Concept Tested: Identification and differentiation of adventitious breath sounds.
Stem keywords: high-pitched, harsh sound, inspiration
Lead-in keywords: known as
Negative lead-in flag: false

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