羊水过多 (polyhydramnion, hydramnios, polyhydramnios)是指妊娠期间子宫内的羊水量超过一定值。约有1%的孕妇会出现羊水过多。[1][2][3] 典型的诊断是羊水指数超过24厘米。[4][5] 临床有两种羊水过多:
- 慢性羊水过多：羊水量逐渐积累
- 急性羊水过多：羊水量在短期内迅速增加
与之相反的是羊水过少，指羊水不足。
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