An Adult Patient with ARDS Is Being Ventilated with VC-CMV $\Delta$

An adult patient with ARDS is being ventilated with VC-CMV.The settings are: f = 14 breaths/min;V_T = 375 mL;PEEP = 16 cm H₂O;and F_IO₂ = 0.8.The patient's ABG values are: pH = 7.40;PaCO₂ = 56 mm Hg;PaO₂ = 48 mm Hg;and SaO₂ = 83%;the mean airway pressure is 18 cm H₂O.The patient's physician decides on a trial of HFOV.What initial ventilator settings should be used?

A) Bias flow = 30 L/min;mP_aw = 23 cm H₂O;set power to obtain $\Delta$ P = 76 cm H₂O;f = 6 Hz;T_I = 33%;F_IO₂ = 1.0
B) Bias flow = 35 L/min;mP_aw = 76 cm H₂O;set power to obtain $\Delta$ P = 33 cm H₂O;f = 10 Hz;T_I = 50%;F_IO₂ = 1.0
C) Bias flow = 20 L/min;mP_aw = 18 cm H₂O;set power to obtain $\Delta$ P = 76 cm H₂O;f = 8 Hz;T_I = 33%;F_IO₂ = 1.0
D) Bias flow = 30 L/min;mP_aw = 30 cm H₂O;set power to obtain $\Delta$ P = 56 cm H₂O;f = 6 Hz;T_I = 50%;F_IO₂ = 1.0