Use this figure to compute the static compliance for an intubated patient with an inspiratory flow rate set at 70 L/min
a. 0.2 cm H2O/(L/sec)
b. 11.7 cm H2O/(L/sec)
c. 16.7 cm H2O/(L/sec)
d. 20 cm H2O/(L/sec)
ANS: B
Use the graph to determine the PIP (34 cm H2O) and the Pplateau (20 cm H2O). Convert the flow into L/sec (70 L/min/60 = 1.2 L/sec). Then, Raw = (PIP − Pplateau)/flow.
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