Which of the following types of oxygen analyzer can be placed in a ventilator circuit to continu-ously monitor oxygen concentration?

1. Polarographic
2. Paramagnetic
3. Galvanic
4. Physical
a. 1 and 4 c. 2 and 3
b. 1 and 3 d. 2 and 4

ANS: B
Galvanic and polarographic analyzers can be used for continuous monitoring of oxygen concen-trations during mechanical ventilation.