TY - CHAP M1 - Book, Section TI - Oligohydramnios A1 - Bianchi, Diana W. A1 - Crombleholme, Timothy M. A1 - D'Alton, Mary E. A1 - Malone, Fergal D. Y1 - 2015 N1 - T2 - Fetology: Diagnosis and Management of the Fetal Patient, 2e AB - Key PointsOligohydramnios is a decrease in the volume of amniotic fluid, with the diagnosis usually being made using ultrasound.Causes of oligohydramnios include ruptured membranes, placental insufficiency, fetal anomalies, maternal injestion of medications, complications of a multiple gestation, chromosomal abnormalities, and idiopathic.Significant oligohydramnios occurring prior to 22 weeks of gestation is associated with a poor prognosis because of a high likelihood of pulmonary hypoplasia and associated malformations.Once oligohydramnios is diagnosed, a careful maternal history should be obtained and a physical examination should be performed to evaluate for preterm premature rupture of membranes.Whenever a diagnosis of oligohydramnios is made, a careful sonographic anatomical survey should be performed to evaluate for fetal anomalies such as features of urinary tract obstruction or renal malformation.Amnioinfusion may assist sonographic visualization of the fetus when severe oligohydramnios is diagnosed in the midtrimester.Management of oligohydramnios secondary to preterm premature rupture of membranes depends on the gestational age and on the fetal and maternal status.Long-term outcome will depend on gestational age at diagnosis, etiology of the problem, and gestational age at delivery. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - obgyn.mhmedical.com/content.aspx?aid=1106401625 ER -