Revista de Ciencias Médicas de Pinar del Río (Jun 2009)
Oligoamnios: epidemiología de un grave problema de la obstetricia moderna Oligoamnios: Epidemiology of a serious problem in the Modern Obstetrics
Abstract
Con el objetivo de contribuir al mejor conocimiento del oligoamnios en nuestro medio, se realizó un estudio epidemiológico, observacional y analítico (casos y controles) en gestantes con oligoamnios en el Hospital General Universitario "Abel Santamaría Cuadrado" de Pinar del Río, en el período comprendido enero - diciembre de 2006. Se estudió un grupo de gestantes con oligoamnios por ultrasonido y un grupo control de gestantes sin esa entidad. Se estudiaron variables de la madre, del embarazo, nacimiento y neonato. Se utilizaron como métodos el Porcentaje, Media, Desviación estándar, Ji cuadrado, Odds Ratio con un intervalo de confianza del 95% (IC 95%) y el Riesgo Atribuible Porcentual (RAP). Los principales factores de riesgo fueron: el bajo peso al inicio de la gravidez (OR=16,7 y RAP=58,9%), el crecimiento intrauterino retardado (OR=5,5 y RAP=49,9%) y el embarazo prolongado (OR=3,8 y RAP=43,9); la insuficiente ganancia de peso y la senectud placentaria sólo estuvieron presentes en el grupo de control. El oligoamnios, a su vez, fue el factor de riesgo de labor inducida de parto y de puntaje de ApgarAimed at contributing to the better knowledge of Oligoamnios in obstetric context an epidemiological, analytical and observation study (cases and control) in pregnant women presenting oligoamnios at "Abel Santamaría Cuadrado" University Hospital in Pinar del Rio was conducted during January-December 2006. A group of pregnant women with oligoamnios (ultrasonic scanning) and a control group without this entity were included in the study. Variables of mothers, pregnancy, birth and newborn were studied. Percentage, mean, standard deviation, chi-square test, odds ratio with confidence interval (CI- 95%) and the attributable risk percent (ARP) were used as statistical methods. The main risk factors were: low-weight at early pregnancy (OR= 16,7 and ARP =58,9%), retarded intrauterine growth (OR= 5,5 and ARP= 49,9%) and the prolonged pregnancy (OR= 3,8 and ARP= 43,9); being only present in the control group the insufficient weight-gaining and the placental aging. The Oligoamnios was, at the same time, a risk factor for induced labor and to the Apgar score < 7 at 5 minutes birth. The 47, 2% of the pregnants ended the pregnancy with a primitive cesarean section and acute fetal distress was the main cause. The retarded intrauterine growth was in large measure associated with oligoamnios and recovered severe asphyxia was twice more frequent in pregnants with ILA < 2, 5 percentile; no-recovered asphyxia was the cause of newborn-death in this series, having no maternal death.
