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Fetal ductus venosus

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https://www.readbyqxmd.com/read/29606482/planning-management-and-delivery-of-the-growth-restricted-fetus
#1
REVIEW
Ahmet A Baschat
A uniform approach to management of fetal growth restriction (FGR) improves outcome, prevents stillbirth, and allows appropriately timed delivery. An estimated fetal weight below the tenth percentile with coexisting abnormal umbilical artery (UA), middle cerebral artery (MCA), or cerebroplacental ratio Doppler index best identifies the small fetus requiring surveillance. Placental perfusion defects are more common earlier in gestation; accordingly, early-onset (≤32 weeks of gestation) and late-onset (>32 weeks) FGR differ in clinical phenotype...
March 1, 2018: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29553462/harmony-behind-the-trumped-shaped-vessel-the-essential-role-of-the-ductus-venosus-in-fetal-medicine
#2
Sifa Turan, Ozhan M Turan
The ductus venosus is a fetal vessel that functions importantly in the transfer of oxygen-and nutrient-rich blood from the umbilical vein to vital organs. Its control under active regulation and its anatomy result in a flow-velocity profile that is typically forward throughout the cardiac cycle. This forward cardiac function reflects afterload, cardiac contractility, compliance, and vascular volume changes. Ductus venosus assessment gives valuable information under different fetal conditions. For example, during first trimester screening, an abnormal ductus venosus measurement changes the screening result...
March 15, 2018: Balkan Medical Journal
https://www.readbyqxmd.com/read/29493778/effects-of-betamethasone-on-fetoplacental-and-maternal-hemodynamics-in-preterm-pregnancies
#3
Cihan Inan, N Cenk Sayin, Zehra N Dolgun, Selen G Erzincan, Isil Uzun, Havva Sutcu, Necdet Sut, Fusun G Varol
OBJECTIVE: To evaluate the possible effects of prenatal steroid administration on Doppler parameters of the umbilical artery, uterine artery, middle cerebral artery, and ductus venosus, the cerebroplacental ratio, and the amniotic fluid index in preterm fetuses. METHODS: The present prospective observational study was performed at the Perinatology Department of Trakya University, Edirne, Turkey, between June 1, 2015, and September 1, 2016. It included patients with healthy singleton pregnancies who had received betamethasone at 24-34 weeks of pregnancy...
March 1, 2018: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/29422211/outcome-in-early-onset-fetal-growth-restriction-is-best-combining-computerized-fetal-heart-rate-analysis-with-ductus-venosus-doppler-insights-from-the-trial-of-umbilical-and-fetal-flow-in-europe
#4
REVIEW
Tiziana Frusca, Tullia Todros, Christoph Lees, Caterina M Bilardo
BACKGROUND: Early-onset fetal growth restriction represents a particular dilemma in clinical management balancing the risk of iatrogenic prematurity with waiting for the fetus to gain more maturity, while being exposed to the risk of intrauterine death or the sequelae of acidosis. OBJECTIVE: The Trial of Umbilical and Fetal Flow in Europe was a European, multicenter, randomized trial aimed to determine according to which criteria delivery should be triggered in early fetal growth restriction...
February 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29351431/feasibility-of-phase-contrast-cine-magnetic-resonance-imaging-for-measuring-blood-flow-in-the-sheep-fetus
#5
An Qi Duan, Jack R T Darby, Jia Yin Soo, Mitchell C Lock, Meng Yuan Zhu, Lucy V Flynn, Sunthara Rajan Perumal, Christopher K Macgowan, Joseph B Selvanayagam, Janna L Morrison, Mike Seed
Phase-contrast cine MRI (PC-MRI) is the gold-standard non-invasive technique for measuring vessel blood flow and has previously been applied in the human fetal circulation. We aimed to assess the feasibility of using PC-MRI to define the distribution of the fetal circulation in sheep. Fetuses were catheterized at 119-120 days gestation (term, 150 days) and underwent MRI at 123 days gestation under isoflurane anesthesia, ventilated at a FiO2 of 1.0. PC-MRI was performed using a fetal arterial blood pressure catheter signal for cardiac triggering...
December 13, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29233550/risk-of-fetal-death-in-growth-restricted-fetuses-with-umbilical-and-or-ductus-venosus-absent-or-reversed-end-diastolic-velocities-before-34-weeks-of-gestation-a-systematic-review-and-meta-analysis
#6
REVIEW
J Caradeux, R J Martinez-Portilla, T R Basuki, T Kiserud, F Figueras
OBJECTIVE: The objective of the study was to establish the risk of fetal death in early-onset growth-restricted fetuses with absent or reversed end-diastolic velocities in the umbilical artery or ductus venosus. DATA SOURCES: A systematic search was performed to identify relevant studies published in English, Spanish, French, Italian, or German using the databases PubMed, ISI Web of Science, and SCOPUS, without publication time restrictions. STUDY ELIGIBILITY CRITERIA: The study criteria included observational cohort studies and randomized controlled trials of early-onset growth-restricted fetuses (diagnosed before 34 weeks of gestation), with information on the rate of fetal death occurring before 34 weeks of gestation and absent or reversed end-diastolic velocities in the umbilical artery and/or ductus venosus...
February 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29057136/prenatal-and-postnatal-sonographic-confirmation-of-congenital-absence-of-the-ductus-venosus-in-a-child-with-noonan-syndrome
#7
Christopher L Newman, Matthew R Wanner, Brandon P Brown
The ductus venosus serves as an important vascular pathway for intrauterine circulation. This case presents a description of an absent ductus venosus in a female patient with Noonan syndrome, including both prenatal and postnatal imaging of the anomaly. In the setting of the anomalous vascular connection, the umbilical vein courses inferiorly to the iliac vein in parallel configuration with the umbilical artery. This finding was suspected based on prenatal imaging and the case was brought to attention when placement of an umbilical catheter was thought to be malpositioned given its appearance on radiography...
2017: Case Reports in Radiology
https://www.readbyqxmd.com/read/29037551/ductus-venosus-doppler-and-the-postnatal-outcomes-of-growth-restricted-fetuses-with-absent-end-diastolic-blood-flow-in-the-umbilical-arteries
#8
Nobuhiro Hidaka, Yuka Sato, Saki Kido, Yasuyuki Fujita, Kiyoko Kato
OBJECTIVE: We aimed to evaluate the outcomes of growth-restricted fetuses with absent end-diastolic velocity in the umbilical arteries (UA-AEDV), and investigate the relationship between Doppler flow velocity waveforms in the ductus venosus (DV) and the clinical features. MATERIALS AND METHODS: This was a retrospective study of growth-restricted fetuses diagnosed with UA-AEDV delivered at our institution between 2013 and 2015. The time from diagnosis of UA-AEDV to delivery, postnatal survival, and developmental prognoses were the primary outcomes...
October 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28948639/time-interval-measurements-of-the-ductus-venosus-during-the-early-second-trimester-of-pregnancy-reference-ranges-and-clinical-application
#9
Manaphat Suksai, Chitkasaem Suwanrath, Ounjai Kor-Anantakul, Alan Geater
OBJECTIVES: The aims of this study were to construct reference ranges for the time interval parameters of the ductus venosus during the early second trimester of pregnancy and to demonstrate the clinical utility in various fetal disorders. METHODS: The ductus venosus Doppler measurements of 331 healthy fetuses between 15 and 22 weeks' gestation were analyzed. The systolic time and diastolic time were subdivided into the systolic acceleration time, systolic deceleration time, diastolic acceleration time, and diastolic deceleration time...
September 26, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28695721/aortic-isthmus-shunt-dynamics-in-normal-and-complicated-monochorionic-pregnancies
#10
Viola Seravalli, Dana Block-Abraham, Cyrethia McShane, Sarah Millard, Ahmet Baschat, Jena Miller
OBJECTIVE: To study fetal aortic isthmus (AoI) shunt dynamics in monochorionic (MC) twins. METHODS: Normal and complicated MC pregnancies were prospectively enrolled. The relationship of isthmus flow index (IFI) with Doppler parameters of umbilical artery (UA), descending aorta, middle cerebral artery, and ductus venosus and with left and right ventricular cardiac output and stroke volume was studied. RESULTS: The IFI was obtained in 180 examinations from 48 pregnancies (24 twin-twin transfusion syndrome, TTTS; 4 selective intrauterine growth restriction, sIUGR; 12 TTTS + sIUGR; and 8 uncomplicated)...
September 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28685004/a-newborn-with-an-alternative-porto-caval-shunt
#11
Çağrı Damar, Ayşe Gül Alımlı, Betül Emine Derinkuyu, Kudret Ebru Özcan, Asburçe Olgaç, Ali Murat Koç
BACKGROUND: Absent ductus venosus (ADV) is a rare condition, but it should be known that this embryonic anomaly may be detected by fetal echocardiographic or newborn ultrasound examinations. CASE REPORT: We present a baby with an ADV and an accompanying alternative porto-caval shunt between the right portal vein and inferior vena cava detected on postnatal ultrasound examination. CONCLUSIONS: Variations in the fetal umbilical or porto-systemic circulations should be detected by fetal or newborn ultrasound examinations and kept in mind before common interventions such as UV catheterizations...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28635180/renal-vascularization-indexes-and-fetal-hemodynamics-in-fetuses-with-growth-restriction
#12
Giovana Farina Doro, Janaína Campos Senra, Agatha Sacramento Rodrigues, Seizo Miyadahira, Renata Lopes Ribeiro, Rossana Pulcinelli Vieira Francisco, Lisandra Stein Bernardes
OBJECTIVE: To identify the correlation between the renal vascularization index (VI), the flow index (FI) and the vascularization and flow index (VFI) and placental and fetal hemodynamics in fetuses with growth restriction. METHOD: Bidimensional ultrasound and three-dimensional power Doppler with the VOCAL technique were used to determine the renal vascular indexes and fetal and placental hemodynamics in fetuses below the 10th percentile for fetal weight. Partial correlation analysis (controlled for renal depth and gestational age) was performed...
June 20, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28629280/absent-ductus-venosus-case-series-from-two-tertiary-centres
#13
Giuseppe Maria Maruotti, Gabriele Saccone, Andrea Ciardulli, Laura Letizia Mazzarelli, Vincenzo Berghella, Pasquale Martinelli
INTRODUCTION: Congenital absence of the ductus venosus (ADV) is a rare vascular anomaly often associated with fetal cardiac and extracardiac anomalies, aneuploidies, and hydrops. The prognosis depends on the patterns of abnormal venous circulation, on the associated malformations and on chromosomal aberrations. METHODS: We performed a retrospective audit of all consecutive cases with ADV referred in our centres and analysed the outcomes. RESULTS: A total of six cases with prenatally diagnosed ADV were identified...
July 12, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28614966/persistently-elevated-nuchal-translucency-and-the-fetal-heart
#14
Trisha V Vigneswaran, Tessa Homfray, Lindsey D Allan, John M Simpson, Vita Zidere
OBJECTIVE: To describe the outcome of fifteen cases with an elevated nuchal translucency (NT) which persisted into the second trimester as nuchal edema (NE) >6 mm whom underwent fetal echocardiography. MATERIALS AND METHODS: Cases were identified following retrospective review of cardiac and genetic findings in fetuses with NE. RESULTS: Minor congenital heart disease was identified in 3/15 by the second trimester. Agenesis of the ductus venosus was evident in four...
July 4, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28613398/fetal-and-umbilical-doppler-ultrasound-in-high-risk-pregnancies
#15
REVIEW
Zarko Alfirevic, Tamara Stampalija, Therese Dowswell
BACKGROUND: Abnormal blood flow patterns in fetal circulation detected by Doppler ultrasound may indicate poor fetal prognosis. It is also possible that false positive Doppler ultrasound findings could lead to adverse outcomes from unnecessary interventions, including preterm delivery. OBJECTIVES: The objective of this review was to assess the effects of Doppler ultrasound used to assess fetal well-being in high-risk pregnancies on obstetric care and fetal outcomes...
June 13, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28598448/fetal-ductus-venosus-pulsatility-index-and-diameter-during-second-and-third-trimester-of-gestation
#16
P Pokharel, M A Ansari
INTRODUCTION: The ductus venosus is a small funnel shaped vessel found posterior to the fetal liver connecting the intra-abdominal umbilical vein and the inferior vena cava. It is one of the three physiological shunts in the fetus. The main objective of this study is to construct the reference table and normogram for fetal ductus venosus Pulsatility Index and diameter with gestational age. METHODS: This was a prospective cross sectional study conducted during August 2011 to July 2012 taking 294 uncomplicated pregnancies using systemic random sampling method...
January 2017: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/28591361/doppler-velocimetry-in-fetal-rats-exposed-to-enoxaparin-and-unfractionated-heparin-ufh-during-pregnancy
#17
Flavio Renato de Almeida Senefonte, Ricardo Dutra Aydos, Vanessa Marcon de Oliveira, Marco Antonio Costa Bósio, Ernesto Antonio Figueiró-Filho
Purpose: To evaluate the effects of enoxaparin and unfractionated heparin (UFH) administered in prophylactic and therapeutic doses on fetal vessels in healthy pregnant Wistar rats, according to Doppler velocimetry measurements. Methods: Fifty animals were assigned to one of five groups: controls (saline), prophylactic and therapeutic enoxaparin (1 and 2 mg/kg/day, respectively), and prophylactic and therapeutic UFH (72 and 400 UI/kg/day, respectively). Uterine horns were examined by ultrasound for identification of live fetuses...
May 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28574580/echographic-features-and-perinatal-outcomes-in-fetuses-with-congenital-absence-of-ductus-venosus
#18
Raquel Garcia-Delgado, Raquel Garcia-Rodriguez, Azahar Romero Requejo, Marta Armas Roca, Luciana Obreros Zegarra, Margarita Medina Castellano, Jose A Garcia Hernandez
INTRODUCTION: The purpose of this study was to describe the echographic features and perinatal outcomes of fetuses with absence of ductus venosus. MATERIAL AND METHODS: Retrospective review of 10 cases with absence of ductus venosus diagnosed by prenatal ultrasonography between January 2014 and February 2016 at a single referral center. Prenatal findings, umbilical shunting type, perinatal outcomes, and autopsy reports were reviewed. RESULTS: A total of 11 491 fetuses underwent a first- and second-trimester screening during the study period...
October 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28493464/first-trimester-ultrasound-screening-for-trisomy-21-based-on-maternal-age-fetal-nuchal-translucency-and-different-methods-of-ductus-venosus-assessment
#19
Philipp Wagner, Jiri Sonek, Jessika Klein, Markus Hoopmann, Harald Abele, Karl Oliver Kagan
OBJECTIVE: To examine whether combining the dichotomous assessment of the a-wave and the ductus venosus (DV) pulsatility index for veins (PIV) measurement improves first-trimester screening performance. METHODS: Retrospective study performed at the University Hospital of Tuebingen based on singleton pregnancies that underwent first-trimester screening including DV flow assessment. In each case, the risk of trisomy 21 was calculated based on maternal age, fetal nuchal translucency, and DV flow either as dichotomous classification of the a-wave, as measurement of the DV PIV, or both...
July 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28455084/recipient-umbilical-artery-elongation-redundancy-in-twin-twin-transfusion-syndrome
#20
COMPARATIVE STUDY
Roopali Donepudi, Lovepreet K Mann, Christoph Wohlmuth, Anthony Johnson, Michael W Bebbington, Kenneth J Moise, David S Boudreaux, Helena Gardiner, Ramesha Papanna
BACKGROUND: Chronic hypertension in adults causes arterial lengthening in major arteries, but the effects of early fetal hypertension on the twin-twin transfusion syndrome recipient's vascular architecture remains unknown. OBJECTIVE: We hypothesize that arterial cord redundancy is related to recipient hypertension and subsequent heart failure. Our objectives were to: (1) establish a 3-dimensional color Doppler ultrasound method of measuring umbilical arterial length relative to its corresponding venous segment in the umbilical cord using artery vein angle; (2) compare recipient artery vein angle to gestational age-matched controls; and (3) test the association of artery vein angle with recipient heart failure...
August 2017: American Journal of Obstetrics and Gynecology
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