Helium/oxygen (Heliox) Mixtures Are Advantageous in Treating Obstructive Lung Disease

question 12

Multiple Choice

Helium/oxygen (heliox) mixtures are advantageous in treating obstructive lung disease (refractory asthma) because:

• A) the gas viscosity is lower
• B) higher oxygen concentrations are possible
• C) helium doesn't dissolve into the plasma
• D) the density of the gas is lower

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