妇产科羊水胎儿常
摘要:羊水、胎儿异常庞战军副教授、副主任医师南方医院妇产科第十四章羊水量异常第一节羊水过多•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。Hydramnios,sometimescalledpolyhydramnios,isanexcessivequantityofamnionicfluid.Normally,thevolumeofamnionicfluidincreasestoabout1liter,orsomewhatmore,by36weeksbutdecreasesthereafter.Postterm,theremaybeonlyafewhundredmlorevenless.Somewhatarbitrarily,morethan2000mlofamnionicfluidisconsideredexcessive,orhydramnios.Inmostinstances,theincreaseinamnionicfluidisgradual,orchronichydramnios.Whenthevolumeincreaseverysuddenly,theuterusmaybecomemarkedlydistendedwithinafewdays,oracutehydramnios.Thefluidinhydramniosisusuallysimilarinappearanceandcompositiontotheamnionicfluidinnormalconditions.
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