1000 milliliters = ________ pints

Which of the following is the technique that can actively remove gas from a ventilator circuit at the beginning of expiration?

a. Expiratory pause c. Positive end-expiratory pressure b. Inspiratory pause d. Negative end-expiratory pressure

Toward the end of a nitrogen washout test for functional residual capacity, the expired concen-tration of N2 begins rising. What does this probably indicate?

a. The patient is trying too hard. b. There is a leak in the system. c. The test is nearing completion. d. N2 is being trapped in the lungs.