An adult patient with ARDS is being ventilated with VC-CMV.The settings are: f = 14 breaths/min; Vᴛ = 375 mL; PEEP = 16 cm H₂O; and FɪO₂ = 0.8.The patient's ABG values are: pH = 7.40; P₂CO₂ = 56 mm Hg; P_aO₂ = 48 mm Hg; and S_aO₂ = 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?

Question

Quizplus · Accepted Answer

The initial settings should be as follows: (1)the initial bias flow for an adult is 25-40 L/min; (2)the mP_aw is set at 3-5 cm H₂O above the observed during conventional ventilation (typically starting between 25 and 30 cm H₂O); (3)the power is set to result in an amplitude 20 greater than the P_aCO₂ before HFOV; (4)the initial frequency for an adult is 5-6 Hz; (5)the initial inspiratory time percent is 33% or 50% to improve CO₂ removal.

An Adult Patient with ARDS Is Being Ventilated with VC-CMV