Search for dissertations about: "placental arteries"
Showing result 1 - 5 of 9 swedish dissertations containing the words placental arteries.
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1. Dynamic Fetal and Placental Circulatory Changes during Uterine Contractions
Abstract : The best mode of delivery for fetuses with intrauterine growth restriction (IUGR) and umbilical artery (UA) blood flow changes is not well elucidated. Uterine artery, fetal UA, middle cerebral artery (MCA), and venous blood flow changes during uterine contractions during an oxytocin challenge test (OCT) have not been observed systemically. READ MORE
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2. Endothelin and nitric oxide in the fetoplacental circulation
Abstract : Background: Normal fetal growth and development depend on a satisfactory uteroplacental and fetoplacental blood flow. This will ensure an adequate gaseous exchange and nutritional supply to the fetus. READ MORE
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3. The human placenta : an angiographic study
Abstract : The arterial vessels from the umbilical cord spreading over the chorion and its cotyledonary branches constitute the main body of the placental vascular tree. In the present study it was visualized by angiography and related to placental developmental factors. READ MORE
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4. Role of cerebral Blood Flow in Fetal Surveillance
Abstract : ABSTRACT In high-risk pregnancies the chronic hypoxemic fetus redistributes its circulation to maintain the blood supply to the vital organs: brain, heart and adrenals. The aims of the studies included in this thesis were: 1) to establish reference curves for fetal cerebral venous blood velocity in normal pregnancies; 2) to determine in high-risk pregnancies the frequency of abnormal Doppler in the cerebral veins and uterine, umbilical and middle cerebral arteries and the umbilical vein and ductus venosus with correlation with adverse perinatal outcome; 3) to analyze the correlation between brain sparing and redistribution of circulation and placental vascular impedance; 4) to evaluate the correlation between brain sparing and fetal umbilical cord blood gases at birth. READ MORE
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5. Endothelin and the regulation of peripheral and uteroplacental vascular tone during pregnancy
Abstract : The mechanism behind the vascular adaptation during pregnancy is poorly understood. The fall in peripheral resistance, particularly in the uterine vasculature, is crucial for sufficient increase in uteroplacental blood flow and thereby for normal fetal growth and development. READ MORE