Korean J Obstet Gynecol.  2006 Apr;49(4):906-909.

A Case of Chronic Placental Abruption-Oligohydramnios Sequence at 19 Weeks' Gestation

• Seo KY
• Park MC

Abstract

Placental abruption is defined as the early separation of a normal placenta from the wall of the uterus before delivery of the fetus. The incidence of it has been reported to be approximately 1% of all pregnancies and perinatal mortality rates from abruption ranged from 20% to 40% in recent studies. Catastrophic placental abruption occurs infrequently, and 20% of patients will deliver seven days later or longer after abruption. These patients have a diagnosis of chronic abruption. 60% of patients with chronic abruption develop oligohydramnios. Chronic abruption-oligohydramnios sequence (CAOS) is defined by the following criteria: (1) clinically significant vaginal bleeding in the absence of placenta previa or other identifiable source of bleeding, (2) amniotic fluid volume initially documented as normal, and (3) oligohydramnios (amniotic fluid index < or =5) eventually developing without concurrent evidence of ruptured membranes. Recently we have experienced a case of chronic abruption with newly developed oligohydramnios at 19 weeks' gestation and report our case with brief review of the literature.

Keyword

Chronic placental abruption-oligohydramnios sequence

MeSH Terms

Abruptio Placentae
Amniotic Fluid
Diagnosis
Female
Fetus
Hemorrhage
Humans
Incidence
Membranes
Oligohydramnios
Perinatal Mortality
Placenta
Placenta Previa
Pregnancy*
Uterine Hemorrhage
Uterus