下列各项组合中，能准确判断酸中毒性质严重程度和代偿情况的是（） -题库考试答案搜索网

下列各项组合中，能准确判断酸中毒性质严重程度和代偿情况的是（）

单选题

2021-12-24 03:24

A、动脉血和尿的pH值
B、动脉血pH值和HCO
C、动脉血和静脉血pH值
D、动脉血和静脉血PaCO
E、静脉血和尿的pH值

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试题解析

临床判断酸碱平衡紊乱类型除参考临床表现及血电解质改变外，动脉血pH、HCO^-₃、H₂CO₃是三个最重要的变量。这三项指标中，pH又取决于HCO^-₃／H₂CO₃比值，而HCO^-₃反映代谢因素的变化，H₂CO₃，反映呼吸因素的变化。pH值可判别有否酸中毒或碱中毒，但不能判断引起酸碱平衡紊乱的病因，也不能断定酸碱平衡紊乱的类型，所以判断酸碱平衡紊乱类型还需HCO^-₃、H₂CO₃各项指标。

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