What is the Pflex on the following pressure-volume loop?
a. 10 cm H2O
b. 15 cm H2O
c. 19 cm H2O
d. 23 cm H2O
ANS: C
The Pflex, or lower inflection point on the inspiratory limb, is the point on the curve where the slope of the inspiratory line changes significantly (see the following figure).
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