Lung simulator diagram of airway pressure release ventilation (APRV): volume (yellow), lung pressure (white), and flow (orange)/time curve. Lung simulator.

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Presentation transcript:

Lung simulator diagram of airway pressure release ventilation (APRV): volume (yellow), lung pressure (white), and flow (orange)/time curve. Lung simulator diagram of airway pressure release ventilation (APRV): volume (yellow), lung pressure (white), and flow (orange)/time curve. Time constant (TC) was known and the T low was set to more than 4 TCs. The blue vertical lines represent each TC. Intrinsic PEEP at each TC would be equal to the point intersecting with the pressure curve, or can be calculated as the end-expiratory lung volume divided by respiratory compliance. Notice that at each TC the flow curve did not decay to 36.2% from its previous value, as expected per the mathematical model. Ehab G Daoud et al. Respir Care 2012;57:282-292 (c) 2012 by Daedalus Enterprises, Inc.