The following data are gathered during a PEEP study (FiO2 = 0.60). Based on these data, what is the optimum PEEP level?
PEEP cm H2O 0 5 10 15 20 25
PaO2 mm Hg 46 54 67 73 75 74
Compliance ml/cm H2O 18 23 26 30 24 19
Systolic pres-sure 125 123 114 115 104 94
Diastolic pres-sure 90 88 83 84 76 68
a. 10 cm H2O
b. 15 cm H2O
c. 20 cm H2O
d. 25 cm H2O
ANS: B
Best PEEP has been exceeded at the point when an increase in PEEP is followed by a decrease in compliance.
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