问题
单项选择题
A client’s chest X-ray reveals bilateral white-outs, indicating adult respiratory distress syndrome (ARDS). This syndrome results from（）
A. cardiogenic pulmonary edema.
B. respiratory alkalosis.
C. increased pulmonary capillary permeability.
D. renal failure.
答案
参考答案：C
解析：
ARDS results from increased pulmonary capillary permeability, which leads to noncardiogenic pulmonary edema. In cardiogenic pulmonary edema, pulmonary congestion occurs secondary to heart failure. In the initial stage of ARDS, respiratory alkalosis may arise secondary to hyperventilation; however, it doesn’t cause ARDS. Renal failure also doesn’t cause ARDS.