For what condition is Heliox predominantly used?

Heliox is predominantly used to aid in the management of airway obstruction due to its unique properties. This therapeutic gas mixture, composed of helium and oxygen, lowers the density of the gas inhaled by the patient. As a result, it can improve airflow during situations of narrow or obstructed airways, making it easier for patients to breathe. This reduced density allows for less turbulence in the airways, which can be particularly beneficial in conditions such as asthma or chronic obstructive pulmonary disease (COPD).

While there are other medical uses for gases or treatments mentioned in the other options, they do not relate as specifically to the distinct properties and advantages of Heliox in airway management. For example, carbon monoxide poisoning is typically treated with high concentrations of oxygen rather than Heliox, and Heliox is not primarily utilized for pain relief or enhancing physical performance, which differentiates its main use in treating airway obstruction.