A male patient (74-kg IBW)is being ventilated with PC-CMV,f = 12/min,PIP = 20 cm H₂O,T_I= 1.5 seconds; the resulting flow-time scalar is shown below.The patient's measured Vᴛ is 435 mL.ABG results on these settings are: pH 7.32,P_aCO₂ 54 mm Hg,HCO₃⁻ 25 mEq/L.The most appropriate action to take is which of the following?

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Quizplus · Accepted Answer

The flow-time scalar shows that TI is adequate,because it shows a time of zero flow during inspiration.Therefore,changing TI would not be appropriate.The measured Vᴛ for this patient is at 5.9 mL/kg IBW; therefore,the Vᴛ could be increased.In the PC mode,this would be done with by increasing the set PIP using the following formulas:
Desired Vᴛ = Known PaCO₂ × Known Vᴛ / Desired PaCO₂; approximately 590 mL
Desired P = 26.8 cm H₂O

A Male Patient (74-Kg IBW)is Being Ventilated with PC-CMV,f =