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51问答网 > 请问脐动脉S⼀D和阻力指数RI正常值是多少?

请问脐动脉S⼀D和阻力指数RI正常值是多少?

2025-03-14 23:05:38

推荐回答（1个）

回答1：

胎儿脐动脉血流ri,s/d值是反映胎儿外周血管阻力的指标,指数高表明远端血管床阻力大,血流量少,指数低表明远端血管阻力小,血流量大.脐动脉的血流反映了胎儿胎盘的血流动力学情况.正常妊娠时,各检测数值应随着孕周的增加而逐渐下降,说明随孕周增大,胎盘血流阻力逐渐减低,血流量增大,从而保证胎儿正常血液供应.
所以一般来说,低一点好.而且越到后期越低的.

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