An Increase in Which of the Following Is Likely to Increase

Multiple Choice

An increase in which of the following is likely to increase the mean airway pressure (MAP) ?
1) Flow rate
2) PEEP levels
3) Peak pressure
4) Expiratory time

A) 1 and 4
B) 2 and 3
C) 1, 2, and 3
D) 2, 3, and 4