Fig. 4From: Continuous assessment of neuro-ventilatory drive during 12 h of pressure support ventilation in critically ill patientsIndividual percentage of study time in which each patient remained in the “Low”, “Normal” and “High” neuro-ventilatory drive class. Eleven patients remained in the “Low” neuro-ventilatory drive class for more than one hour, median 6.1 [3.9–8.5] h. Six patients remained in the “High” neuro-ventilatory drive class for more than one hour, median 3.4 [2.2–7.8] hBack to article page