American journal of obstetrics and gynecology
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Am. J. Obstet. Gynecol. · Sep 1994
Biochemical composition of the coelomic fluid in anembryonic pregnancy.
Our purpose was to investigate the biochemical composition of the coelomic fluid in first-trimester anembryonic pregnancies. ⋯ The fluid collected in anembryonic pregnancies is of exocoelomic origin and its biochemical characteristics reflect a failure of most placental biological mechanisms such as metabolic function, transport function, and endocrine activity.
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Am. J. Obstet. Gynecol. · Sep 1994
Intrapartum fetal pulse oximetry: fetal oxygen saturation trends during labor and relation to delivery outcome.
Our purpose was to study fetal arterial oxygen saturation trends by continuous pulse oximetry during labor in subjects with normal and abnormal delivery outcomes. ⋯ With the use of reflectance pulse oximetry, a statistically significant decrease in fetal arterial oxygen saturation was observed during labor in women with normal and abnormal delivery outcomes.
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Am. J. Obstet. Gynecol. · Sep 1994
The intrapartum platelet count in patients with HELLP (hemolysis, elevated liver enzymes, and low platelets) syndrome: is it predictive of later hemorrhagic complications?
We wished to determine in patients with HELLP syndrome (hemolysis, elevated liver enzymes, and low platelets) whether (1) there is an intrapartum threshold platelet count that is predictive of immediate or delayed hemorrhagic complications and (2) whether prophylactic platelet transfusion at delivery prevents these outcomes. ⋯ Although bleeding in the gravid patient is related to more factors than platelet count alone, patients with HELLP syndrome in whom an intrapartum platelet count above 40,000/microliters maintained are unlikely to have clinically significant postpartum bleeding. Patients with intrapartum platelet counts < or = 40,000/microliters, however, are at significant risk for postpartum bleeding, but prophylactic platelet transfusion at delivery does not ensure a significantly lower incidence of postpartum hemorrhagic complications.
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Am. J. Obstet. Gynecol. · Sep 1994
An abnormal umbilical artery waveform: a strong and independent predictor of adverse perinatal outcome in patients with preeclampsia.
An abnormal umbilical artery Doppler waveform is a risk factor for adverse perinatal outcome. However, it has not been established whether this is related to the earlier gestational age at delivery of fetuses with abnormal Doppler findings or whether Doppler findings are an independent predictor of perinatal outcome. Our purpose was to determine whether an abnormal Doppler umbilical artery waveform is associated with adverse perinatal outcome even after the gestational age at delivery is controlled for as a confounding variable in patients with preeclampsia. ⋯ An abnormal Doppler umbilical artery waveform is a strong and independent predictor of adverse perinatal outcome in patients with preeclampsia.
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Am. J. Obstet. Gynecol. · Sep 1994
Randomized Controlled Trial Comparative Study Clinical TrialComparison of prophylactic angiotensin II versus ephedrine infusion for prevention of maternal hypotension during spinal anesthesia.
Our purpose was to study the efficacy of ephedrine versus angiotensin II prophylactic infusions to counter maternal hypotension that occurs during spinal anesthesia at cesarean delivery. ⋯ In the healthy term fetus there is an advantage in using angiotensin II to maintain maternal blood pressure during regional anesthesia.