Fig. 1From: Assisted mechanical ventilation promotes recovery of diaphragmatic thickness in critically ill patients: a prospective observational studyTimeline of the study protocol. The day in which the patient was switched from controlled to assisted mechanical ventilation was marked as day 0. The study days before day 0 were numbered with negative numbers and correspond to the controlled ventilation days; the days after day 0 were numerated with positive numbers and correspond to the assisted mechanical ventilation period. MV, mechanical ventilation; ICU, intensive care unitBack to article page