• “太阳当空照，花儿对我笑，小鸟说早早早……”
第一节 羊水过多
• 妊娠期羊水量超过2000ml者，称羊水过多 （polyhydramnios）。
• 发生率0.5-1%。分为急性和慢性。
ppt课件
5
Hydramnios, sometimes called polyhydramnios, is an excessive quantity of amnionic fluid. Normally, the volume of amnionic fluid increases to about 1 liter, or somewhat more, by 36 weeks but decreases thereafter. Postterm, there may be only a few hundred ml or even less. Somewhat arbitrarily, more than 2000 ml of amnionic fluid is considered excessive, or hydramnios. In most instances, the increase in amnionic fluid is gradual, or chronic hydramnios. When the volume increase very suddenly, the uterus may become markedly distended within a few days, or acute hydramnios. The fluid in hydramnios is usually similar in appearance and composition to the amnionic fluid in normal conditions.
