1 Option. What is the air-to-oxygen entrainment ratio for delivering 40% oxygen through an air entrainment mask?

a Option. 2 : 1

b Option. 1 : 2

c Option. 1 : 3

d Option. 3 : 1

2 Option. Studies have shown that mustache and pendant cannulas can reduce the cost of oxygen therapy by as much as:

a Option. 10%

b Option. 30%

c Option. 50%

d Option. 80%

3 Option. What is the approximate partial pressure of inspired oxygen of room air if the barometric pressure is raised to 2 atm?

a Option. 150 mm Hg

b Option. 300 mm Hg

c Option. 200 mm Hg

d Option. 1520 mm Hg