... Medicine, The Cleveland Clinic Foundation Auto- positive end-expiratory pressure:Mechanisms and treatmentREVIEW■ ABSTRACT Auto- positive end-expiratory pressure (auto- PEEP) is acommon problem in patients ... of these factors.■ WHO DEVELOPS AUTO- PEEP? Auto- PEEP is more common than previouslythought in critically ill, mechanically ventilat-ed patients. Unexpected auto- PEEP occurs inup to 35% of ... ofexpiratory flow, resulting in auto- PEEP.7,9However, auto- PEEP and dynamic hyper-inflation may also occur without any intrinsiclimitation on expiratory flow,10and auto- PEEP is not uncommon...