Search Results
Results 201 - 250 of 1458
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Ghidini Alessandro - - 2008
Doppler interrogation of the uterine arteries provides information on the physiologic transformation of the spiral arteries during pregnancy. Lack or suboptimal conversion of such arteries by the late second or third trimester of pregnancy is a strong indicator of increased risk for adverse pregnancy outcome, in particular, iatrogenic prematurity due ...
Roncaglia Nadia - - 2008
OBJECTIVE: To assess the role of uterine artery (UtA) Doppler to predict superimposed preeclampsia in women with chronic hypertension. METHODS: In a cohort of 182 women with chronic hypertension, UtA Doppler studies were performed before 25 weeks (mean 19.7 +/- 2.1 weeks) and repeated later in pregnancy (mean 28.5 +/- ...
Mari Giancarlo - - 2008
One of the most important applications of Doppler ultrasonography in obstetrics is the detection of fetal anemia in pregnancies complicated by either red-cell alloimmunization or by other causes of fetal anemia. Doppler of the umbilical artery also has prognostic value in pregnancies affected by twin-twin transfusion syndrome undergoing in-utero intervention. ...
Turan O M - - 2008
OBJECTIVE: To identify the sequence of progression of arterial and venous Doppler abnormalities from the onset of placental insufficiency in intrauterine growth restriction (IUGR). METHODS: Prospective observational study of singletons with IUGR (abdominal circumference < 5(th) percentile) who underwent serial standardized umbilical artery (UA), middle cerebral artery (MCA), ductus venosus ...
Dikensoy Ebru - - 2008
AIM: The aim of the present study was to determine whether fasting during Ramadan causes ketonemia and/or ketonuria and their effects on fetal intrauterine development. METHODS: Thirty-six consecutive healthy women with uncomplicated pregnancies of >or=20 weeks of gestation who were fasting during Ramadan were included in the study group (group ...
U-King-Im Jean Marie - - 2008
The main objective of this study was to assess the quality of CT pulmonary angiography (CTPA) for suspected pulmonary embolus (PE) in the pregnant population. We retrospectively identified 40 consecutive pregnant patients who underwent CTPA from January 2005 to December 2006. Forty consecutive age-matched non-pregnant women were used as a ...
Vasović Ljiljana P - - 2008
BACKGROUND: Although centuries of the human CAC research are behind us, still there is a stimulus for the authors to describe something new or to add to the "archive" of already known facts about its angioarchitecture. METHODS: With normal configurations of the posterior part of the CAC in early prenatal ...
Thomas J T - - 2008
OBJECTIVES: To investigate the interobserver variability of fetal middle cerebral artery (MCA) peak systolic velocity (PSV) Doppler measurements in a tertiary fetal medicine unit. METHODS: This was a prospective cohort study of pregnant women between 22 and 34 weeks of gestation who underwent fetal MCA-PSV Doppler velocimetry by a paired ...
Severi Filiberto M - - 2008
The objective of this cohort study is to evaluate the relationship between blood flow resistance in the fetal middle cerebral artery (MCA) and the beginning of spontaneous labor. A group of consecutive women (n = 664) with a singleton pregnancy was submitted to Doppler examination of fetal MCA between 24 ...
Harville E W - - 2008
OBJECTIVES: To examine the association between self reports and biomarkers of stress and placental resistance (measured by Doppler ultrasound of the uterine and umbilical arteries), to determine if restriction of blood flow to the placenta is a mechanism by which stress might affect health during pregnancy. METHODS: Eight hundred and ...
Wallace J M - - 2008
Uterine blood flow (UtBF) is a major regulator of transplacental fetal nutrient supply. The aim was to serially measure uterine blood flow from mid to late pregnancy in a paradigm of relatively late onset placental and fetal growth restriction. Singleton bearing adolescent dams was fed high (H) or control (C) ...
Ghoghoberidze S - - 2008
Preeclampsia - a multisystem disorder characterized by hypertension and proteinuria that occurs more frequently. The disease is one of the most important causes of maternal and fetal mortality and morbidity in developed countries. The aim of the research was to estimate the value of screening for preeclampsia and fetal growth ...
Towers Craig V - - 2008
OBJECTIVE: The purpose of this study was to determine if antenatal fetal surveillance should be considered in pregnancies complicated by fetal gastroschisis, and if so, what gestational age should testing begin. STUDY DESIGN: During an 18-year period, all pregnancies delivered of a newborn that had gastroschisis were identified. Numerous data ...
Maciuleviciene Regina - - 2008
OBJECTIVE: To assess fetal middle cerebral artery (MCA) peak systolic velocity (PSV) in cases of rhesus alloimmunization and to establish whether MCA-PSV is valid for the prediction of fetal anemia. METHODS: The study population included 157 pregnant women diagnosed with rhesus alloimmunization. MCA-PSV measurements were obtained within 3 days of ...
Hack K E A - - 2008
OBJECTIVES: To investigate the predictive value of abnormal umbilical artery Doppler findings on outcome in uncomplicated monochorionic (MC) twin pregnancies. METHODS: Sixty-seven MC twin pregnancies, with antenatal care and delivery at the University Medical Center, Utrecht, The Netherlands, between 1999 and 2004, were studied. Pregnancies with antenatal signs of twin-to-twin ...
Fratelli N - - 2008
OBJECTIVE: To assess the value of early transabdominal uterine artery Doppler ultrasound for the prediction of gestational outcomes in pregnancies at high risk for preeclampsia. METHODS: This was an observational study. Doppler ultrasound of the uterine arteries at 11-14 weeks of gestation was performed in 76 women at high risk ...
Stonek Felix - - 2008
OBJECTIVE: MTHFR C677T polymorphism is a genetic factor increasing both risk factors for atherosclerotic vascular diseases and obstetric complications like preeclampsia (PE) and fetal growth restriction (FGR). Increased uterine artery impedance, measured by uterine artery Doppler in the second trimester of pregnancy is also associated with PE and FGR. In ...
Dikensoy Ebru - - 2009
OBJECTIVE: To determine the effects of fasting during the month of Ramadan on fetal development and maternal serum cortisol and lipid profile. METHODS: This study was performed in Obstetrics and Gynecology Department of Gaziantep University Hospital, between 23 September 2006 and 23 October 2006 (during the month of Ramadan). Thirty-six ...
Papageorghiou A T - - 2008
OBJECTIVES: To examine the outcome of fetuses diagnosed with short femur length at the time of the routine anomaly scan. METHODS: This was a retrospective review of all pregnancies referred to a tertiary referral unit with fetal femur length below the 5(th) centile for gestation at 18-24 weeks of gestation. ...
Figueras F - - 2008
OBJECTIVE: To examine the relationship between smallness at birth and the predictive value of umbilical artery Doppler. DESIGN: Retrospective cohort. SETTING: Tertiary referral university hospital, Barcelona. POPULATION: A total of 7645 singleton pregnancies delivered between January 2002 and June 2004. METHODS: The associations with adverse outcome were assessed for small-for-gestational-age ...
Lurie Samuel - - 2008
BACKGROUND: Amniotic band syndrome with umbilical cord strangulation is extremely rare and is usually described during second trimester. We present a case of umbilical cord strangulation causing fetal demise in a full-term otherwise healthy fetus. CASE: A 39-year-old gravida 15 para 12 after one previous cesarean section presented with reduced ...
Fox Nathan S - - 2008
OBJECTIVE: To examine the hypothesis that pregnancy is associated with vascular remodeling, leading to an increased vascular compliance that can be observed in subsequent pregnancies. STUDY DESIGN: Chart review of41 multiparous deliveries at our institution from a 2-month period in 2004. Charts examined were from patients with uncomplicated, singleton pregnancies ...
Aukes Annet M - - 2008
The authors investigated the influence of pregnancy and gender on the density of trigeminal and sympathetic perivascular nerves in posterior cerebral arteries (PCA) and the reactivity to norepinephrine and calcitonin gene-related peptide (CGRP). PCAs were isolated from nonpregnant, late-pregnant, postpartum, and male rats, mounted and pressurized on an arteriograph chamber ...
Ozkur Ayhan - - 2008
PURPOSE: To determine whether twinkling artifacts on color and power Doppler sonography could be used as a new sonographic sign of intrauterine fetal demise (IUFD). METHODS: In this prospective study, 24 consecutive pregnant women with IUFD were included after fetal sonographic examinations. Sonographic examination included gray-scale, color, power, and spectral ...
Rang Saskia - - 2008
OBJECTIVE: The study hypothesis was that hemodynamic measurements in conjunction with uterine artery Doppler could enable selection of women at risk for the development of preeclampsia or fetal growth restriction. STUDY DESIGN: Systolic (SBP) and diastolic blood pressure, heart rate (RR), cardiac output (CO), total peripheral resistance (TPR), phase difference ...
Vasapollo Barbara - - 2008
We evaluated the predictive value of elevated total vascular resistance on the outcome of pregnancy in normotensive high-risk primigravidas with bilateral notching of the uterine artery Doppler. A total of 526 high-risk primigravidas referred to the obstetrics outpatient clinic of Tor Vergata University with bilateral notching of the uterine artery ...
Prefumo F - - 2008
OBJECTIVE: Maternal serum levels of asymmetric dimethyl-arginine (ADMA), an endogenous inhibitor of endothelial nitric oxide synthase, are known to be increased in pregnant women with high-resistance placental circulation in the second trimester. The aim of the present study was to investigate the relationship between uterine artery resistance and maternal serum ...
Guiot C - - 2008
OBJECTIVES: To investigate three-dimensional (3D) power Doppler ultrasound indices in the assessment of placental perfusion and their relationship to gestational age (GA), placental position and umbilical artery Doppler flow velocity waveform (FVW) patterns in normal and intrauterine growth-restricted (IUGR) pregnancies. METHODS: Forty-five pregnant women at 23-37 weeks' gestation were studied, ...
Manogura Anita C - - 2008
OBJECTIVE: The purpose of this study was to test the hypothesis that multivessel fetal Doppler imaging provides enhanced prediction of necrotizing enterocolitis (NEC) in preterm placental insufficiency. STUDY DESIGN: Placental-based growth-restricted fetuses (abdominal circumference <5%, abnormal umbilical artery [UA] Doppler imaging) were examined. UA, middle cerebral artery, ductus venosus, and ...
Garcia Guaraci Silveira - - 2008
OBJECTIVE: To establish a cut-off value for short-term variation (STV) assessed by computerized cardiotocography (CTG) as a single parameter in the prediction of acidemia at birth. METHODS: Cross-sectional study performed on 41 single gestations with diagnosis of hypertension syndrome after the 27th week and delivered by elective cesarean. Computerized CTG ...
Barraza-Vázquez Antonio - - 2008
OBJECTIVE: The aim was to identify exposure levels to dichlorodiphenyltrichloroethane (DDT) and to assess maternal factors as determinants of the serum dichlorodiphenyldichloroethylene (DDE) concentration in umbilical cord in newborns from the Mexican Pacific coastal area of Oaxaca State. MATERIALS AND METHODS: A cross-sectional study was conducted of 86 paired mothers ...
Haugen Guttorm - - 2008
BACKGROUND: Serotonin (5-hydroxytryptamine) is a potent vasoactive substance in human umbilical arteries (HUA). AIM: To investigate the vasodilatory response pattern of serotonin in HUA from pregnancies complicated by preterm deliveries as compared to uncomplicated term pregnancies. METHODS AND SUBJECTS: Umbilical cord segments were perfused in vitro. These were taken from ...
Valensise H - - 2008
OBJECTIVE: To evaluate the effect of plasma volume expansion (PVE) and nitric oxide (NO) donors, in addition to antihypertensive therapy for gestational hypertensive pregnancies complicated by intrauterine growth restriction (IUGR) with absent end-diastolic flow (AEDF) in the umbilical artery (UA). METHODS: This was a case-control study into which 32 gestational ...
Prefumo F - - 2008
OBJECTIVE: To investigate maternal cardiovascular function in pregnancies complicated by intrauterine growth restriction (IUGR). METHODS: Maternal echocardiography and ambulatory blood pressure monitoring were performed in pregnancies complicated by IUGR (n = 12) and controls (n = 12), all of whom were normotensive at enrollment. RESULTS: Compared to controls, maternal blood ...
Sulak Osman - - 2008
OBJECTIVE: To evaluate the development of the normal urachus during the fetal period. METHODS: The study was carried out on 149 human fetuses (male 87, female 62) aged between 9-40 weeks, obtained with families' consent from Isparta Maternity and Children's Hospital, Isparta, Turkey, between 1997 and 2002. The study was ...
Troyano Luque Juan Mario - - 2008
AIMS: To assess the responsive fetal extremity movement to vibro-acoustic stimulation test (VAST). METHODS: The moving velocity of fetal femur was assessed after VAST by pulsed Doppler device. The ultrasonic beam was insonated at a right angle to the fetal femur. The following parameters were determined: limb retreat velocity in ...
Goynumer Gokhan - - 2008
OBJECTIVES: To study the association between thickness of the umbilical cord at 11+0 to 14+6 gestational weeks and perinatal outcome. METHODS: We studied 216 pregnant women between 11+0 and 14+6 weeks' gestation with singletons, intact membranes, normal volumes of amniotic fluid and a regular menstrual period. Patients with umbilical cord ...
Palma-Dias Ricardo S - - 2008
OBJECTIVE: To determine the value of routine transvaginal color Doppler assessment of the uterine arteries at 22-24 weeks of gestation in the prediction of placental insufficiency. METHODS: Women with singleton pregnancies scheduled for routine ultrasound scans at 22-24 weeks were offered Doppler assessment of the uterine arteries by transvaginal ultrasound. ...
Ghosh Gisela S - - 2008
Color Doppler Ultrasound was performed on 202 post-term pregnancies to detect the presence of a nuchal cord. A nuchal cord was diagnosed if the umbilical cord could be followed 360 degrees around the fetal neck. The results were not disclosed to the managing obstetrician, midwife, and patient. The perinatal outcome ...
Tarzamni Mohammad Kazem - - 2008
Doppler flow velocity waveform analysis of fetal vessels is one of the main methods for evaluating fetus health before labor. Doppler waves of middle cerebral artery (MCA) can predict most of the at risk fetuses in high risk pregnancies. In this study, we tried to obtain normal values and their ...
Pares David - - 2008
BACKGROUND: Despite significant advances, perinatal hemolytic disease has not been eradicated and is still associated with significant morbidity and mortality, especially in developing countries. An accurate method for antenatal diagnosis and quantification of fetal anemia is a crucial step prior to the performance of invasive procedures, which are not risk-free. ...
Koech A - - 2008
BACKGROUND: Pregnancy Induced Hypertension (PIH) is associated with placental morphological changes, alterations in the blood flow patterns in the umbilical vessels and adverse fetal and maternal outcome. Studies have demonstrated changes in the structure of the umbilical vessels but these have not been described across the length of the cord ...
Moreira de Sa Renato Augusto - - 2007
OBJECTIVE: To identify significant predictors for adverse neonatal outcome in severe by compromised fetuses. METHODS: Consecutive premature fetuses at between 25 and 32 weeks' with severe placental insufficiency were examined prospectively. Inclusion criteria were: singletons; normal anatomy; abnormal umbilical artery Doppler pulsatility index; abnormal cerebroplacental ratio; middle cerebral artery pulsatility ...
Rizzo Giuseppe - - 2007
OBJECTIVE: To assess the agreement of stroke volume (SV) measured with two-dimensional (2D) ultrasonography with Doppler capability (vs) four-dimensional (4D) with spatiotemporal image correlation (STIC) in normal and growth restricted fetuses. METHODS: 2D Doppler and 4D STIC were used to measure SV of 40 normal fetuses at 20 to 22 ...
van Eijndhoven H W F - - 2007
The objective of this study is to determine whether the vascular response to adrenomedullin is modulated by pregnancy. To this end, the authors study the effect of adrenomedullin on different contractile responses of mesenteric, uterine, renal, and saphenous arteries of 10-day pregnant and nonpregnant rats in myographs. Adrenomedullin inhibited contractile ...
Parra-Cordero M - - 2007
OBJECTIVES: The aim of this study was to determine the fetal arterial and venous Doppler pulsatility index and time averaged velocity ranges for women undergoing third trimester ultrasound. METHODS: One hundred and seventy-two women with singleton pregnancy and clinical indication underwent biometry and fetal Doppler assessment at 23 to 41 ...
Carneiro Raquel S - - 2008
OBJECTIVES: To establish normative data for ophthalmic artery Doppler parameters throughout a healthy pregnancy, to investigate the possible correlation between these Doppler measurements and gestational age, and to test intraobserver variability. METHODS: A prospective cross-sectional study was performed to assess various Doppler parameters in 276 healthy women between 20 and ...
Hajdú J - - 2008
An abnormal course of the umbilical vein is a rare anomaly. Its association with the congenital absence of the ductus venosus is common. We found 3 cases of an abnormal course of the umbilical vein and an absent ductus venosus. In 2 of these cases, the umbilical vein turned down ...
Tamura H - - 2008
BACKGROUND: Changes in blood flow impedance of the uterine artery (UA) and uterine radial artery (RA) which is in the lower-extremity of the UA were examined during early pregnancy. METHODS: Blood flow impedance was assessed by transvaginal color-pulsed-Doppler-ultrasonography in 72 women from weeks 4-16 of pregnancy and expressed as a ...
Deurloo K L - - 2007
OBJECTIVE: To construct reference ranges for spiral artery (SA) flow velocities and examine the possibility to predict intra uterine growth restricted (IUGR) fetuses, pregnancy-induced hypertension (PIH) and/or preeclampsia. METHODS: Spiral artery flow velocity measurements were performed using Color Doppler between 11 to 13 + 6, between 14 to 17 + ...
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