Author Question: Helium must always be combined with at least how much O2? a. 20 b. 30 c. 40 d. ... (Read 34 times)

Chloeellawright · **on:** Jul 16, 2018

Helium must always be combined with at least how much O2?

a. 20
b. 30
c. 40
d. 50

Question 2

If you have to deliver medical gas to a patient from a compressed gas cylinder, which of the fol-lowing devices would you select to control gas flow?

a. Regulator
b. O2 blender
c. Reducing valve
d. Flowmeter

aprice35067 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
He must always be combined with at least 20 O2. The higher the concentration of O2 used in a heliox mixture, the less likely it is that heliox would be beneficial. Heliox mixtures of less than 60 He are rarely used clinically.

Answer to Question 2

ANS: D
If the goal is to control gas delivery to a patient for O2 therapy or nebulized medication (see Chapters 36 and 38), a flowmeter must also be used.