羊水过多

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。Alexander, ES, Spitz, HB, Clark, RA. Sonography of polyhydramnios. AJR Am J Roentgenol 1982; 138:343Hill LM; Breckle R; Thomas ML; Fries JK, Polyhydramnios: ultrasonically detected prevalence and neonatal outcome, Obstet Gynecol 1987 Jan;69(1):21-5, PMID 3540761Hobbins JC; Grannum PA; Berkowitz RL; Silverman R; Mahoney MJ,Ultrasound in the diagnosis of congenital anomalies.,Obstet Gynecol 1979 Jun 1;134(3):331-45., PMID 453266  典型的诊断是羊水指数超过24厘米。Y Barnhard; I Bar-Hava; MY Divon, Is polyhydramnios in an ultrasonographically normal fetus an indication for genetic evaluation?, Obstet Gynecol. 1995 Nov;173(5):1523-7.Brady K, Polzin WJ, Kopelman JN, Read JA. Risk of chromosomal abnormalities in patients with idiopathic polyhydramnios. Obstet Gynecol 1992;79:234-8.
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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Category:懷孕