The respiratory therapist in the ICU is called to assess a patient with ARDS. The patient is SOB. The x-ray shows "white" chest radiograph and the PAO2 is 60 mm Hg on an FiO2 of 100%. Which of the following is indicated?
a. Shunting
b. Alveolar hyperventilation
c. Decreased CO2
d. Perfusion impairment
ANS: A
Shunt is indicated by the following: shunt usually presents with a white radiograph. ARDS is a classic example of shunting. Shunt also does not respond to high level of supplemental oxygen.
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