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孕34周sd的正常值是多少
更新时间: 2020-11-05 00:00:00  

孕34周sd的正常值是小于3.0。SD指胎儿脐动脉收缩压与舒张压的比值。SD值可以反映胎盘部位的血液供应情况,如果出现胎盘功能不良或者是脐带病变时就会导致S/D的值升高,处理不及时就会导致胎儿在宫腔内缺氧,影响孩子的正常发育,时间久了会导致胎儿发育迟缓,胎儿发育不良。

关键词: sd 正常值 多少

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