What is the sign indicating upper airway obstruction during inspiration?

What is the sign indicating upper airway obstruction during inspiration?

• A. Stridor
• B. Rhonchi
• C. Wheezing
• D. Crackles

Answer: (A)

Stridor is a high-pitched, wheezing sound caused by disrupted airflow in the upper airway, typically occurring during inspiration. This sound is indicative of upper airway obstruction, which can be due to various factors such as inflammation, anaphylaxis, foreign body aspiration, or tumors. The presence of stridor suggests that air is having difficulty passing through narrowed airways, leading to turbulent airflow that produces the characteristic sound. In contrast, rhonchi are low-pitched sounds caused by obstruction or secretions in larger airways, while wheezing is more commonly associated with narrowing of the lower airways, such as in asthma or bronchospasm. Crackles, often heard in conditions affecting the alveoli and interstitial lung spaces, are unrelated to upper airway obstructions. Thus, stridor stands out as the primary indicator of upper airway obstruction during inspiration.

Stridor is a high-pitched, wheezing sound caused by disrupted airflow in the upper airway, typically occurring during inspiration. This sound is indicative of upper airway obstruction, which can be due to various factors such as inflammation, anaphylaxis, foreign body aspiration, or tumors. The presence of stridor suggests that air is having difficulty passing through narrowed airways, leading to turbulent airflow that produces the characteristic sound.

In contrast, rhonchi are low-pitched sounds caused by obstruction or secretions in larger airways, while wheezing is more commonly associated with narrowing of the lower airways, such as in asthma or bronchospasm. Crackles, often heard in conditions affecting the alveoli and interstitial lung spaces, are unrelated to upper airway obstructions. Thus, stridor stands out as the primary indicator of upper airway obstruction during inspiration.