Which symptom is NOT associated with an upper airway obstruction in an infant or child?

Wheezing is typically associated with lower airway obstructions, such as those found in conditions like asthma or bronchiolitis, where airflow is restricted in the smaller airways of the lungs. In contrast, an upper airway obstruction involves the structures above the level of the vocal cords, which can lead to distinctive symptoms that are different from those caused by lower airway issues.

Stridor is a high-pitched sound that occurs when there is turbulence in the upper airway, often indicating inflammation or narrowing, such as in croup or anaphylaxis. Increased respiratory rate can be a response to any kind of respiratory distress, including upper airway obstructions, as the body attempts to compensate for inadequate airflow. Cyanosis, a bluish discoloration of the skin, is a sign of significant oxygen deprivation, which can occur due to severe upper airway obstructions.

Therefore, wheezing being linked to lower airway obstructions makes it the symptom that is not associated with upper airway obstructions in infants or children.