NORCET-7 Mains-2024: Which of the following abnormal breath sounds commonly seen in a case with foreign body obstruction in upper…

NORCET-7 Mains-2024

Medical & Surgical Nursing

Easy

Appeared in: NORCET-7 Mains-2024

Explanation

Stridor is a high-pitched, harsh, inspiratory sound caused by turbulent airflow through a narrowed or obstructed upper airway (larynx or trachea).
A foreign body lodged in the upper airway is a classic cause of acute obstruction, leading to the characteristic sound of stridor.
Its presence signifies a significant and potentially life-threatening blockage that requires immediate medical attention.

Option A: Crackles (or rales) are caused by fluid in the alveoli or the sudden opening of collapsed small airways. They are associated with conditions affecting the lung parenchyma, like pneumonia or pulmonary edema, not upper airway obstruction.
Option B: Wheezing is a continuous, musical sound caused by the narrowing of the lower airways (bronchi and bronchioles). The question specifies an upper airway obstruction.
Option C: Rhonchi are low-pitched, snoring, or rattling sounds caused by secretions or mucus in the larger lower airways (bronchi). They are not caused by a solid foreign body obstruction.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of abnormal breath sounds related to airway obstruction as background academic context rather than a clinical decision trigger.
Recognizing stridor is a critical nursing skill because it indicates a medical emergency. Prompt identification allows for rapid intervention to prevent complete airway closure and respiratory arrest.
A nurse's initial assessment of breath sounds can quickly differentiate between an upper airway emergency (stridor) and lower airway issues (wheezes, crackles), guiding the immediate response and communication with the medical team.
What if? If the patient was an infant with a gradual onset of stridor, a brassy cough, and low-grade fever, the most likely cause would be Croup (laryngotracheobronchitis) rather than a foreign body, though both are upper airway obstructions.

How to Approach the Question

First, analyze the question stem to identify the core clinical scenario: 'foreign body obstruction in the upper airway'.
Focus on the key localizing term: 'upper airway'. This includes structures like the pharynx, larynx, and trachea.
Review the options, which are all abnormal (adventitious) breath sounds.
Mentally recall or deduce the origin of each sound. Ask yourself, 'Which of these sounds is generated by a problem in the upper airway?'
Stridor is specifically caused by obstruction in the larynx or trachea. Wheezes and crackles originate in the lower airways. Rhonchi are from secretions in the larger airways.
Therefore, match 'upper airway obstruction' with 'stridor' to select the correct answer.

Concept Tested & Keywords

Concept Tested: Identification of abnormal breath sounds related to airway obstruction.
Stem keywords: abnormal breath sounds, foreign body obstruction, upper airway
Lead-in keywords: Which
Clinical cues: The location 'upper airway' is the key clinical cue that points directly to the correct sound.

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E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 397-399