下列哪种情况下通气/血流比值升高?A.肺不张 B.肺纤维化 C.哮喘发作 D.肺毛细血管阻塞

作者: rantiku 人气: - 评论: 0
问题 下列哪种情况下通气/血流比值升高?
选项 A.肺不张 B.肺纤维化 C.哮喘发作 D.肺毛细血管阻塞
答案 D
解析 通气/血流比值是指每分钟肺泡通气量和每分钟肺血流量的比值。肺毛细血管阻 塞时,每分钟肺血流量减少,通气/血流比值升高。肺不张、肺纤维化和哮喘发作时,每分钟肺泡通气量 减少,导致通气/血流比值降低。

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