American journal of obstetrics and gynecology
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Am. J. Obstet. Gynecol. · Nov 1997
Meta AnalysisThe association of placenta previa with history of cesarean delivery and abortion: a metaanalysis.
Our purpose was to determine the incidence of placenta previa based on the available epidemiologic evidence and to quantify the risk of placenta previa based on the presence and number of cesarean deliveries and a history of spontaneous and induced abortion. ⋯ There is a strong association between having a previous cesarean delivery, spontaneous or induced abortion, and the subsequent development of placenta previa. The risk increases with number of prior cesarean deliveries. Pregnant women with a history of cesarean delivery or abortion must be regarded as high risk for placenta previa and must be monitored carefully. This study provides yet another reason for reducing the rate of primary cesarean delivery and for advocating vaginal birth for women with prior cesarean delivery.
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Am. J. Obstet. Gynecol. · Nov 1997
Multicenter StudyMulticenter study on the clinical value of fetal pulse oximetry. I. Methodologic evaluation. The French Study Group on Fetal Pulse Oximetry.
Our purpose was to evaluate the feasibility of intrapartum fetal pulse oximetry, the distribution of fetal oxygen saturation values, and the relationship with the neonatal outcome in a population with an abnormal fetal heart rate. ⋯ The feasibility of fetal pulse oximetry is satisfactory in clinical practice. It is easy to use and provides a fair rate of recorded values, even in a population with suspicion of fetal distress. A low fetal oxygen saturation is significantly associated with an abnormal neonatal outcome.
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Am. J. Obstet. Gynecol. · Nov 1997
Managed care does not lower costs but may result in poorer outcomes for patients with gestational diabetes.
Our purpose was to compare the costs of prenatal care and subsequent maternal and neonatal outcomes in patients with gestational diabetes cared for in an inner-city university hospital house staff clinic versus an inner-city managed care organization. ⋯ Managed care does not decrease the cost of caring for patients with gestational diabetes but does lead to a greater rate of neonatal macrosomia, which may reflect poorer glucose control.
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Am. J. Obstet. Gynecol. · Nov 1997
Predictive factors for neonatal morbidity in neonates with an umbilical arterial cord pH less than 7.00.
Fewer than 50% of neonates with an umbilical arterial pH < 7.00 have neonatal complications. Our objective was to identify clinical predictive factors for adverse outcomes in this group of neonates. ⋯ Neonatal morbidity in neonates with an umbilical arterial cord pH < 7.00 can be predicted by a high arterial base deficit value and low 5-minute Apgar score.
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Am. J. Obstet. Gynecol. · Nov 1997
Fetoplacental vascular tone during fetal circuit acidosis and acidosis with hypoxia in the ex vivo perfused human placental cotyledon.
Our purpose was to determine the effects of acidosis and acidosis-hypoxia on fetoplacental perfusion pressure and its response to angiotensin II. ⋯ In the perfused placental cotyledon fetoplacental perfusion pressure and pressor response to angiotensin II are not affected by fetal circuit acidosis or acidosis-hypoxia. This suggests that neither fetal acidosis nor fetal acidosis combined with hypoxia has a direct effect on fetoplacental vascular tone.