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失代偿性呼吸性酸中毒（）

A.pH7.38，PaO50mmHg，PaCO40mmHg

B.pH7.30，PaO50mmHg，PaCO80mmHg

C.pH7.40，PaO60mmHg，PaCO65mmHg

D.pH7.35，PaO80mmHg，PaCO20mmHg

E.pH7.25，PaO70mmHg，PaCO30mmHg上述血气分析结果符合

答案

参考答案：B

解析：

代谢性酸中毒主要根据临床表现和血气分析的结果进行诊断，如果动脉血碳酸氢根水平降低（<22mmol/L），而二氧化碳分压基本正常或有所下降，则可诊断代谢性酸中毒。如pH在正常范围（7.35～7.45）则可诊断代谢性酸中毒代偿；如pH降低（<7.35），则诊断为代谢性酸中毒失代偿。正常动脉血PaCO为35～45mmHg，平均40mmHg，代谢性酸中毒时PaCO：降低。

单项选择题 B1型题

健脾益气的代表方是（）。

A.补中益气汤

B.香砂六君子汤

C.参苓白术散

D.全生白术散

E.麻仁丸
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问答题

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