Fig. 3. Experimental records that help illustrate the effects of the two ventilatory modes during 24 h of mechanical ventilation with pressure support ventilation (PSV; A ) and with neurally adjusted ventilatory assist (NAVA; B ) in a representative patient. Note that Paw, VT, and VE are more variable in NAVA than in PSV. c/min = breaths per minute; EAdi = electrical activity of the diaphragm; P0.1= occlusion pressure; Paw= airway pressure; Petco2= end-tidal partial pressure of carbon dioxide; RR = respiratory rate; VE = minute ventilation; VT = tidal volume.