In which of the following patients is positive end expiratory pressure (PEEP) most indicated?
FiO2 PaO2
a. 0.3 80 mm Hg
b. 0.5 80 mm Hg
c. 0.3 50 mm Hg
d. 0.5 50 mm Hg
ANS: C
As a rule, refractory hypoxemia exists when a patient's PaO2 cannot be maintained above 50 to 60 mm Hg with an FiO2 of 0.40 to 0.50 or more.
Health Professions
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