Calculate airway resistance (Raw) for a ventilator patient, in cm H2O/L/sec, with the following information: Peak inspiratory pressure (PIP) is 20 cm H2O, plateau pressure (Pplateau) is 15 cm H2O, PEEP is 5 cm H2O, and set flow rate is 50 L/min
a. 5 Raw
b. 6 Raw
c. 10 Raw
d. 15 Raw
ANS: B
Raw = (PIP − Pplateau)/flow and flow is in L/sec.
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