What patients are at greatest risk for auto-PEEP? 1. Those supported by spontaneous breath modes 2. Those with high airway resistance 3. Those with high expiratory flow resistance

a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3

ANS: B
Patients at greatest risk of development of auto-PEEP are those with high airway resistance who are being supported by modes that limit expiratory time.