Helium is sometimes used in patients with severe airway obstruction to reduce the work of breathing.Which of the following properties of helium allows better airflow in these patients?

Question

Quizplus · Accepted Answer

A gas mixture of 80% helium and 20% oxygen (Heliox) has a lower density but a higher viscosity than air. Delivering Heliox to a child who has severe croup (subglottic swelling) may decrease the work of breathing (WOB).

Helium Is Sometimes Used in Patients with Severe Airway Obstruction