Which of the following clinical features are characteristics of hypoxemic respiratory failure? I. Pao2/Fio2 less than 300 II. respiratory distress III. respiratory rate less than 20 breaths/min IV. tachycardia
A. I, III only
B. II, IV only
C. I, II, IV only
D. I, II, III, IV
ANS: B (page 369)
Cognitive Level: Recall
A. Incorrect response: See explanation B.
B. Correct response: Hypoxemic respiratory failure is characterized by severe hypoxemia (Pao2/Fio2 <200), respiratory distress, tachypnea (>30 breaths/minute), tachycardia, and a non-COPD cause (e.g., ARDS), acute pneumonia, trauma, and acute pulmonary edema.
C. Incorrect response: See explanation B.
D. Incorrect response: See explanation B.
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