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Overview Of Ventilator Graphics Terry L. Forrette, M.H.S., RRT Airways Resistance Increased Inspiratory Resistance Expiratory Resistance Volume Volume Inspiratory Resistance Pressure Pressure Increased Expiratory Resistance Changes In Raw Volume Volume A B Pressure Pressure What Do We Have Here? Lung Overdistension Big Problems!!! Pressure Overshoot Volume Volume Pressure Pressure 15 www.tlforrette.com mail@tlforrette.com Wisdom is knowledge applied 6 TL Forrette & Associates (985) 624-9640
Overview Of Ventilator Graphics Terry L. Forrette, M.H.S., RRT Maximizing PIP Levels Upper And Lower Inflection Points V T A = 400/20 = 20 mL/CWP B = 600/40 = 15 mL/CWP V T 0.6 LITERS LITERS 0.6 High PEEP set point 1.0 0.4 0.4 B 0.2 Paw cmH 2 O -60 -40 -20 A 0 20 40 60 Paw cmH 2 O -60 40 20 0 20 40 60 Low PEEP set point Trigger Effort Increased Trigger Effort V T LITERS 0.6 Expiration 0.4 V T LITERS 0.6 Expiration 0.4 Assisted Breath 0.2 Inspiration Increased Trigger Effort 0.2 Inspiration Paw cmH 2 O -60 40 20 0 20 40 60 Paw cmH 2 O -60 40 20 0 20 40 60 What About New Modes? Assisted Ventilation Breath Types SIMV CPAP Auto Mode APRV PPS PRVC SPONT IPPV PAV CMV AutoFlow VS PS BIPAP VCV MMV ASB VAPS PCV ILV PLV Pressure Constant • PC • PS • BiPAP • BiLevel/APRV PAV/PPS & TC Volume Constant • Volume using CMV or SIMV • Dual Modes • VS/MMV/ASV www.tlforrette.com mail@tlforrette.com Wisdom is knowledge applied 7 TL Forrette & Associates (985) 624-9640
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