Synonym: intrinsic PEEP
Features of auto-PEEP:
(1) incomplete emptying of the lung during expiration
(2) air trapping
Continued cycles of air trapping can result in alveolar hyperinflation.
Risk factors:
(1) high airway resistance, especially during expiration
(2) ventilation with a limited expiratory time
(3) increased airway secretions
(4) increased lung compliance
(5) obstructive lung disease
Potential complications:
(1) increased work of breathing
(2) barotrauma and/or volutrauma
(3) impeded venous return
(4) decreased cardiac output
(5) increased pulmonary vascular resistance
