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Fetal doppler ultrasound protocol

Daniel L Rolnik, Fabricio da Silva Costa, Daljit Sahota, Jon Hyett, Andrew McLennan
AIM: To assess the quality of mean uterine artery pulsatility index (UtAPI) measurement in a first trimester pre-eclampsia screening program. METHODS: Consecutive patients attending first trimester screening for fetal chromosomal abnormalities also had combined screening for pre-eclampsia based on the Fetal Medicine Foundation (FMF) algorithm, in a large practice in Sydney, Australia, from May 2014 to February 2017. Distributions of mean UtAPI multiples of the median (MoM) on the logarithmic scale were plotted in relation to the normal median with 95% confidence interval (CI) for each operator and for each month...
June 19, 2018: Ultrasound in Obstetrics & Gynecology
Zahra Hoodbhoy, Babar Hasan, Fyezah Jehan, Bart Bijnens, Devyani Chowdhury
Background: In Pakistan, stillbirth rates and early neonatal mortality rates are amongst the highest in the world. The aim of this study is to provide proof of concept for using a computational model of fetal haemodynamics, combined with machine learning. This model will be based on Doppler patterns of the fetal cardiovascular, cerebral and placental flows with the goal to identify those fetuses at increased risk of adverse perinatal outcomes such as stillbirth, perinatal mortality and other neonatal morbidities...
February 12, 2018: Gates open research
(no author information available yet)
When any fetal blood group factor inherited from the father is not possessed by the mother, antepartum or intrapartum fetal-maternal bleeding may stimulate an immune reaction in the mother. Maternal immune reactions also can occur from blood product transfusion. The formation of maternal antibodies, or "alloimmunization," may lead to various degrees of transplacental passage of these antibodies into the fetal circulation. Depending on the degree of antigenicity and the amount and type of antibodies involved, this transplacental passage may lead to hemolytic disease in the fetus and neonate...
March 2018: Obstetrics and Gynecology
(no author information available yet)
When any fetal blood group factor inherited from the father is not possessed by the mother, antepartum or intrapartum fetal-maternal bleeding may stimulate an immune reaction in the mother. Maternal immune reactions also can occur from blood product transfusion. The formation of maternal antibodies, or "alloimmunization," may lead to various degrees of transplacental passage of these antibodies into the fetal circulation. Depending on the degree of antigenicity and the amount and type of antibodies involved, this transplacental passage may lead to hemolytic disease in the fetus and neonate...
March 2018: Obstetrics and Gynecology
Sonja Brennan, Michal Schneider, David Watson, Yogavijayan Kandasamy, Donna Rudd
INTRODUCTION: Disorders of fetal growth, such as intrauterine growth restriction (IUGR) and large for gestational age (LGA), have been found to have a profound effect on the development of the fetal kidney. Abnormal kidney development is associated with hypertension and chronic kidney disease later in life. This study will use a novel ultrasound measurement to assess the renal parenchymal growth and kidney arterial blood flow in the fetus to evaluate the development of the fetal kidneys and provide an indirect estimate of nephron number...
December 28, 2017: BMJ Open
Nader Z Rabie, Adam T Sandlin, Kevin A Barber, Songthip Ounpraseuth, Wendy Nembhard, Everett F Magann, Curtis Lowery
OBJECTIVES: Ultrasound serves an important role in the prenatal diagnosis of fetal structural anomalies. Recently, there has been increased use of teleultrasound protocols. We aimed to evaluate the sensitivity and accuracy of teleultrasound. METHODS: We conducted an Institutional Review Board-approved retrospective cohort study determining the sensitivity and accuracy of teleultrasound. In addition, we evaluated the number of ultrasound examinations required to complete an anatomic survey...
June 29, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Francesc Figueras, Eduard Gratacos, Marta Rial, Ilan Gull, Ladislav Krofta, Marek Lubusky, Rogelio Cruz-Martinez, Mónica Cruz-Lemini, Miguel Martinez-Rodriguez, Pamela Socias, Cristina Aleuanlli, Mauro C Parra Cordero
INTRODUCTION: Fetal growth restriction (FGR) affects 5%-10% of all pregnancies, contributing to 30%-50% of stillbirths. Unfortunately, growth restriction often is not detected antenatally. The last weeks of pregnancy are critical for preventing stillbirth among babies with FGR because there is a pronounced increase in stillbirths among growth-restricted fetuses after 37 weeks of pregnancy. Here we present a protocol (V.1, 23 May 2016) for the RATIO37 trial, which evaluates an integrated strategy for accurately selecting at-risk fetuses for delivery at term...
June 15, 2017: BMJ Open
Kelly Yamasato, Ivica Zalud
The aim of this review is to discuss three dimensional (3D) power Doppler of the placenta and its clinical applications. There is a strong clinical need to develop noninvasive, simple and widely available methods of evaluating in vivo placental function to assess fetal wellbeing. While conventional ultrasound is a proven tool in the evaluation of fetal structural anomalies and health, its ability to assess placental function, especially prior to the onset of fetal compromise, is the subject of ongoing investigation...
August 28, 2017: Journal of Perinatal Medicine
Stephen A McAleavey, Kevin J Parker, Juvenal Ormachea, Ronald W Wood, Christopher J Stodgell, Philip J Katzman, Eva K Pressman, Richard K Miller
The placenta is the critical interface between the mother and the developing fetus and is essential for survival and growth. Despite the widespread use of ultrasound imaging and Doppler in obstetrics and gynecology and the recent growth of elastographic technologies, little is known about the biomechanical (elastic shear wave) properties of the placenta and the range of normal and pathologic parameters that are present. This study uses a well-developed protocol for perfusing whole placentas, post-delivery, to maintain tissue integrity and function for hours...
June 2016: Ultrasound in Medicine & Biology
Jelena Popić Ramac, Vinko Vidjak, Dinko Skegro, Zeljko Duić, Darko Blasković, Lidija Erdelez, Andrija Skopljanac-Macina, Slaven Suknaić, Marko Slavica, Nikola Ivan Leder
Imaging the pregnant patient presents a unique challenge to radiologist due to the risk of radiation to the conceptus (embryo/fetus). A rare case of a successfully recognized and treated pseudoaneurysm (PA) of the abdominal aorta is to be presented. The pseudoaneurysm occurred in the third trimester and had a favorable outcome for the mother and the baby. Emergent abdominal ultrasound (US) is the first modality in diagnostic algorithm for the rupture of aortic aneurysm in a pregnant woman. It provides the most rapid diagnostic information, although intestinal gas and abdominal tenderness may limit its accuracy...
September 2015: Collegium Antropologicum
N Bil, V Eggermann, A Roueli, J Nizard
OBJECTIVES: To assess the clinical, legal, and technical roles of ultrasound in an outpatient pregnancy assessment clinic, while evaluating the feasibility for these consultations to be performed at home. MATERIALS AND METHODS: We prospectively assessed all consultations from April 3 to May 31, 2013, at the outpatient pregnancy assessment clinic of La Pitié-Salpêtrière, Paris, France. We recorded all procedures and the number and type of ultrasound examination performed, according to their indication...
January 2016: Journal de Gynécologie, Obstétrique et Biologie de la Reproduction
Jamie O Lo, Matthias C Schabel, Victoria H J Roberts, Terry K Morgan, Juha P Rasanen, Christopher D Kroenke, Sophie R Shoemaker, Eliot R Spindel, Antonio E Frias
OBJECTIVE: We previously demonstrated that prenatal nicotine exposure decreases neonatal pulmonary function in nonhuman primates, and maternal vitamin C supplementation attenuates these deleterious effects. However, the effect of nicotine on placental perfusion and development is not fully understood. This study utilizes noninvasive imaging techniques and histological analysis in a nonhuman primate model to test the hypothesis that prenatal nicotine exposure adversely effects placental hemodynamics and development but is ameliorated by vitamin C...
March 2015: American Journal of Obstetrics and Gynecology
Eric Hildebrand, Madeleine Abrandt Dahlgren, Catarina Sved, Tomas Gottvall, Marie Blomberg, Birgitta Janerot-Sjoberg
BACKGROUND: Studies of prenatal detection of congenital heart disease (CHD) in the UK, Italy, and Norway indicate that it should be possible to improve the prenatal detection rate of CHD in Sweden. These studies have shown that training programs, visualization of the outflow tracts and color-Doppler all can help to speed up and improve the detection rate and accuracy. We aimed to introduce a more accurate standardized fetal cardiac ultrasound screening protocol in Sweden. METHODS: A novel pedagogical model for training midwives in standardized cardiac imaging was developed, a model using a think-aloud analysis during a pre- and post-course test and a subsequent group reflection...
2014: BMC Medical Imaging
Joshua A Copel, Mert Ozan Bahtiyar
Fetal growth restriction is one of the most complex problems encountered by obstetricians. Ultrasound-estimated fetal weight less than the 10th percentile for the gestational age is the most widely accepted diagnostic criterion. Management protocols vary from institution to institution. Doppler velocimetry provides valuable information about fetal status. We offer a practical approach to management and timing of delivery based on available data in the literature.
May 2014: Obstetrics and Gynecology
Francesc Figueras, Eduard Gratacós
Small fetuses are defined as those with an ultrasound estimated weight below a threshold, most commonly the 10th centile. The first clinically relevant step is the distinction of 'true' fetal growth restriction (FGR), associated with signs of abnormal fetoplacental function and poorer perinatal outcome, from constitutional small-for-gestational age, with a near-normal perinatal outcome. Nowadays such a distinction should not be based solely on umbilical artery Doppler, since this index detects only early-onset severe forms...
2014: Fetal Diagnosis and Therapy
Nicole O Alers, Graham Jenkin, Suzanne L Miller, Euan M Wallace
BACKGROUND: Fetal growth restriction complicates about 5% of pregnancies and is commonly caused by placental dysfunction. It is associated with increased risks of perinatal mortality and short-term and long-term morbidity, such as cerebral palsy. Chronic in utero hypoxaemia, inflammation and oxidative stress are likely culprits contributing to the long-term neurological sequelae of fetal growth restriction. In this regard, we propose that melatonin, a powerful antioxidant, might mitigate morbidity and/or mortality associated with fetal growth restriction...
December 23, 2013: BMJ Open
Sebastian R Hobson, Rebecca Lim, Elizabeth E Gardiner, Nicole O Alers, Euan M Wallace
INTRODUCTION: Pre-eclampsia is a common pregnancy condition affecting between 3% and 7% of women. Unfortunately, the exact pathophysiology of the disease is unknown and as such there are no effective treatments that exist notwithstanding prompt delivery of the fetus and culprit placenta. As many cases of pre-eclampsia occur in preterm pregnancies, it remains a significant cause of maternal and perinatal morbidity and mortality. Recently, in vitro and animal studies have highlighted the potential role of antioxidants in mitigating the effects of the disease...
2013: BMJ Open
L G B Siqueira, V S Areas, A M Ghetti, J F Fonseca, M P Palhao, C A C Fernandes, J H M Viana
The objective was to determine the accuracy of a pregnancy test for predicting nonpregnant cattle based on the evaluation of corpus luteum (CL) blood flow at 20 d (CLBF-d20) after timed artificial insemination (TAI). Crossbred Holstein-Gir dairy heifers (n=209) and lactating cows (n=317) were synchronized for TAI using the following protocol: intravaginal implant (1.0 g of progesterone) and 2mg of estradiol benzoate i.m. on d -10, implant removal and 0.526 mg of sodium cloprostenol i.m. on d -2, 1mg of estradiol benzoate i...
October 2013: Journal of Dairy Science
Laurent J Salomon, Jean-Pierre Bernard, Anne-Elodie Millischer, Pascale Sonigo, Francis Brunelle, Nathalie Boddaert, Yves Ville
OBJECTIVE: A combination of magnetic resonance imaging (MRI) images with real time high-resolution ultrasound known as fusion imaging may improve prenatal examination. This study was undertaken to evaluate the feasibility of using fusion of MRI and ultrasound (US) in prenatal imaging. STUDY DESIGN: This study was conducted in a tertiary referral center. All patients referred for prenatal MRI were offered to undergo fusion of MRI and US examination. All cases underwent 1...
August 2013: American Journal of Obstetrics and Gynecology
D Iliescu, S Tudorache, A Comanescu, P Antsaklis, S Cotarcea, L Novac, N Cernea, A Antsaklis
OBJECTIVE: To assess the potential of first-trimester sonography in the detection of fetal abnormalities using an extended protocol that is achievable with reasonable resources of time, personnel and ultrasound equipment. METHODS: This was a prospective two-center 2-year study of 5472 consecutive unselected pregnant women examined at 12 to 13 + 6 gestational weeks. Women were examined using an extended morphogenetic ultrasound protocol that, in addition to the basic evaluation, involved a color Doppler cardiac sweep and identification of early contingent markers for major abnormalities...
September 2013: Ultrasound in Obstetrics & Gynecology
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