A.40%B.45%C.50%D.55%E.60%胸科手术病人侧卧位时下肺的平均血流量占总肺血流量的比例为

作者: rantiku 人气: - 评论: 0
问题 A.40% B.45% C.50% D.55% E.60% 胸科手术病人侧卧位时下肺的平均血流量占总肺血流量的比例为
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答案 E
解析 :仰卧位时,人体右肺与左肺血流量所占的比例分别为55%和45%,当侧卧位时,两肺血流量的比例发生变化。右侧卧时,下肺占65%,上肺占35%;左侧卧时,下肺占55%,上肺占45%,故卧侧肺的平均血流量为60%,对侧为40%。

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