单选题小儿呼吸衰竭的诊断标准是
A.PaO≤8kPa(60mmHg),PaCO≥6kPa(45mmHg),SaO<90%
B.PaO≤8kPa(60mmHg),PaCO≥6.7kPa(50mmHg),SaO<90%
C.PaO≤6.7kPa(50mmHg),PaCO≥6.7kPa(50mmHg),SaO<85%
D.PaO≤6.7kPa(50mmHg),PaCO≥8kPa(60mmHg),SaO<85%
E.PaO≤6.7kPa(50mmHg),PaCO≥6.7kPa(50mmHg),SaO<90%
参考答案:C
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