Calculate airway resistance (Raw) for a ventilator patient, in cm H2O/L/sec, when the peak inspir-atory pressure (PIP) is 50 cm H2O, the plateau pressure (Pplateau) is 15 cm H2O, and the set flow rate is 60 L/min
a. 0.58 Raw
b. 1.2 Raw
c. 35 Raw
d. 50 Raw
ANS: C
Raw = PTA/flow; or Raw = (PIP − Pplateau)/flow
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