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b超单vmax多少秒正常
更新时间: 2020-11-05 00:00:00  

不同患者的vmax都是不同的,医生会根据不同患者的情况进行判断。vmax指脐动脉的收缩期最大血流速度与舒张期最低血流速度之比,反映的是胎盘血管的阻力,阻力高就是提示胎儿缺氧。

关键词: vmax 多少 正常

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