Table 1.

Factors potentially involved in the variability of the response to recruitment maneuvers in ARDS

ARDS-related
	Focal vs. nonfocal
	Early vs. Late
	Severe vs. moderate
	Lung recruitability
	Associated vasoactive drugs
RM-related
	Type of recruitment maneuvers
	Distribution of lung perfusion
	Transpulmonary pressure
	Timing of application
	Patient positioning
Post-RM strategy
	Post-RM PEEP

ARDS, acute respiratory distress syndrome; RM, recruitment maneuvers; PEEP, positive ned-expiratory pressure.