keyword
MENU ▼
Read by QxMD icon Read
search

Fetal doppler ultrasound

keyword
https://www.readbyqxmd.com/read/28330415/novel-detection-of-placental-insufficiency-by-magnetic-resonance-imaging-in-the-nonhuman-primate
#1
Jamie O Lo, Victoria H J Roberts, Matthias C Schabel, Xiaojie Wang, Terry K Morgan, Zheng Liu, Colin Studholme, Christopher D Kroenke, Antonio E Frias
The placenta is a vital organ necessary for healthy fetal development. Placental insufficiency creates an in utero environment where the fetus is at risk of insufficient oxygen or nutrient exchange. This is primarily caused by impairment of either maternal or fetal circulation or vascular thrombosis such as placental infarction. As a result of placental dysfunction, affected fetuses may be growth restricted, neurologically impaired, and at risk of increased morbidity and mortality. In a cohort of 4 pregnant Rhesus macaques, we describe antenatal detection of naturally occurring intrauterine growth restriction (IUGR) and aberrant fetal neurodevelopment in 1 animal...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28324997/assessing-the-development-of-fetal-myocardial-function-by-a-novel-doppler-myocardial-performance-index
#2
Ahsan H Khandoker, F Marzbanrad, Y Kimura, Saeed Al Nuaimi, M Palaniswami
Doppler-derived myocardial performance index are used to assess aspects of systolic and diastolic function in adult as well as fetal heart. The Tei Index (TI) is a useful and non-invasive tool. The aim of this study was to determine normal values of fetal left ventricular (LV) TI in early (16-32 weeks) and late trimester (35-41 weeks) fetuses and to develop a new myocardial performance index (K-index; KI) which focuses on fetal diastolic interval when oxygenated blood from the placenta filled in the LV. Simultaneous recordings of Doppler Ultrasound Signal (DUS) of the LV outflow tracts and fetal electrocardiogram signals were obtained in 55 early- and late-trimester fetuses...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28306539/three-dimensional-power-doppler-of-the-placenta-and-its-clinical-applications
#3
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...
March 17, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28298706/an-assessment-of-fetal-cerebral-and-hepatic-perfusion-in-normal-pregnancy-and-pre-eclampsia-using-three-dimensional-ultrasound
#4
Susan Addley, Amanda Ali, Stephen Ong
BACKGROUND: Pre-eclampsia and placental causes of intrauterine growth restriction (IUGR) are part of the same spectrum of disorders. In IUGR, there is preferential shunting of blood to the fetal brain at the expense of other organs. We wanted to demonstrate that this also occurs in pre-eclampsia using three dimensional (3D) ultrasound. The 3D indices of perfusion are: flow index (FI), vascular index (VI) and vascularisation flow index (VFI) which reflect tissue vascularity and flow intensity...
January 2017: Ulster Medical Journal
https://www.readbyqxmd.com/read/28295158/first-trimester-ultrasound-tests-alone-or-in-combination-with-first-trimester-serum-tests-for-down-s-syndrome-screening
#5
REVIEW
S Kate Alldred, Yemisi Takwoingi, Boliang Guo, Mary Pennant, Jonathan J Deeks, James P Neilson, Zarko Alfirevic
BACKGROUND: Down's syndrome occurs when a person has three, rather than two copies of chromosome 21; or the specific area of chromosome 21 implicated in causing Down's syndrome. It is the commonest congenital cause of mental disability and also leads to numerous metabolic and structural problems. It can be life-threatening, or lead to considerable ill health, although some individuals have only mild problems and can lead relatively normal lives. Having a baby with Down's syndrome is likely to have a significant impact on family life...
March 15, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28285426/fetal-growth-restriction-current-knowledge
#6
REVIEW
Luciano Marcondes Machado Nardozza, Ana Carolina Rabachini Caetano, Ana Cristina Perez Zamarian, Jaqueline Brandão Mazzola, Carolina Pacheco Silva, Vivian Macedo Gomes Marçal, Thalita Frutuoso Lobo, Alberto Borges Peixoto, Edward Araujo Júnior
BACKGROUND: Fetal growth restriction (FGR) is a condition that affects 5-10% of pregnancies and is the second most common cause of perinatal mortality. This review presents the most recent knowledge on FGR and focuses on the etiology, classification, prediction, diagnosis, and management of the condition, as well as on its neurological complications. METHODS: The Pubmed, SCOPUS, and Embase databases were searched using the term "fetal growth restriction". RESULTS: Fetal growth restriction (FGR) may be classified as early or late depending on the time of diagnosis...
March 11, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28269185/ultrasound-transducer-positioning-aid-for-fetal-heart-rate-monitoring
#7
Paul Hamelmann, Alex Kolen, Lars Schmitt, Rik Vullings, Hans van Assen, Massimo Mischi, Libertario Demi, Judith van Laar, Jan Bergmans
Fetal heart rate (fHR) monitoring is usually performed by Doppler ultrasound (US) techniques. For reliable fHR measurements it is required that the fetal heart is located within the US beam. In clinical practice, clinicians palpate the maternal abdomen to identify the fetal presentation and then the US transducer is fixated on the maternal abdomen where the best fHR signal can be obtained. Finding the optimal transducer position is done by listening to the strength of the Doppler audio output and relying on a signal quality indicator of the cardiotocographic (CTG) measurement system...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267189/association-of-placental-jets-and-mega-jets-with-reduced-villous-density
#8
Rojan Saghian, Joanna L James, Merryn H Tawhai, Sally L Collins, Alys R Clark
Spiral arteries (SAs) lie at the interface between the uterus and placenta, and supply nutrients to the placental surface. Maternal blood circulation is separated from the fetal circulation by structures called villous trees. SAs are transformed in early pregnancy from tightly coiled vessels to large high-capacity channels, which is believed to facilitate an increased maternal blood flow throughout pregnancy with minimal increase in velocity, preventing damage to delicate villous trees. Significant maternal blood flow velocities have been theorized in the space surrounding the villi (the intervillous space, IVS), particularly when SA conversion is inadequate, but have only recently been visualized reliably using pulsed wave Doppler ultrasonography...
May 1, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28264611/prevalence-and-diagnostic-accuracy-of-doppler-ultrasound-of-placenta-accreta-in-egypt
#9
Ahmed M Maged, Emad Salah, Hany Saad, Hadeer Meshaal, Ashraf Eldaly, Maha A Katta, Wesam S Deeb
OBJECTIVE: To assess the prevalence of placenta accreta among those with placenta implanted over CS scar and to evaluate the accuracy of Doppler ultrasound in diagnosis. METHODS: A cross sectional study included 100 patients with placenta previa anterior with at least one previous CS. Ultrasound and color Doppler was done to all participants and correlated with operative findings. RESULTS: There was a significant difference between accrete and non accrete group regarding maternal age (32...
March 6, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28231064/three-dimensional-ultrasound-for-prenatal-assessment-of-conjoined-twins-additional-advantages
#10
Tuangsit Wataganara, Pornpimol Ruangvutilert, Prasert Sunsaneevithayakul, Kusol Russameecharoen, Katika Nawapun, Nisarat Phithakwatchara
Conjoined twins are a rare, but serious, complication of monozygotic twins. Early prenatal diagnosis of conjoined twins is increasingly made with transvaginal ultrasound and color Doppler studies. Most prenatally diagnosed conjoined twins are terminated due to the high perinatal mortality, but advancement in pediatric surgery has allowed for successful postnatal separation in a small number of cases, and some parents may consider this option over termination of pregnancy. It is important to get a detailed prenatal ultrasound for the site and extent of fusion for an accurate categorization...
February 23, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28227415/ultrasound-transducer-positioning-aid-for-fetal-heart-rate-monitoring
#11
Paul Hamelmann, Alex Kolen, Lars Schmitt, Rik Vullings, Hans van Assen, Massimo Mischi, Libertario Demi, Judith van Laar, Jan Bergmans, Paul Hamelmann, Alex Kolen, Lars Schmitt, Rik Vullings, Hans van Assen, Massimo Mischi, Libertario Demi, Judith van Laar, Jan Bergmans, Alex Kolen, Judith Van Laar, Paul Hamelmann, Libertario Demi, Lars Schmitt, Rik Vullings, Hans Van Assen, Massimo Mischi, Jan Bergmans
Fetal heart rate (fHR) monitoring is usually performed by Doppler ultrasound (US) techniques. For reliable fHR measurements it is required that the fetal heart is located within the US beam. In clinical practice, clinicians palpate the maternal abdomen to identify the fetal presentation and then the US transducer is fixated on the maternal abdomen where the best fHR signal can be obtained. Finding the optimal transducer position is done by listening to the strength of the Doppler audio output and relying on a signal quality indicator of the cardiotocographic (CTG) measurement system...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227331/assessing-the-development-of-fetal-myocardial-function-by-a-novel-doppler-myocardial-performance-index
#12
Ahsan H Khandoker, F Marzbanrad, Y Kimura, Saeed Al Nuaimi, M Palaniswami, Ahsan H Khandoker, F Marzbanrad, Y Kimura, Saeed Al Nuaimi, M Palaniswami, Ahsan H Khandoker, Y Kimura, Saeed Al Nuaimi, F Marzbanrad, M Palaniswami
Doppler-derived myocardial performance index are used to assess aspects of systolic and diastolic function in adult as well as fetal heart. The Tei Index (TI) is a useful and non-invasive tool. The aim of this study was to determine normal values of fetal left ventricular (LV) TI in early (16-32 weeks) and late trimester (35-41 weeks) fetuses and to develop a new myocardial performance index (K-index; KI) which focuses on fetal diastolic interval when oxygenated blood from the placenta filled in the LV. Simultaneous recordings of Doppler Ultrasound Signal (DUS) of the LV outflow tracts and fetal electrocardiogram signals were obtained in 55 early- and late-trimester fetuses...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28180202/applicability-and-technical-aspects-of-two-dimensional-ultrasonography-for-assessment-of-fetal-heart-function
#13
REVIEW
Nathalie Jeanne Bravo-Valenzuela, Alberto Borges Peixoto, Luciano Marcondes Nardozza, Alex Sandro Souza, Edward Araujo Júnior
In recent years, fetal echocardiography has been used for the screening and diagnosis of anatomical heart defects and for the detailed study of fetal cardiac function. This method is characterized by its easy implementation and good reproducibility, allowing the diagnosis of myocardial dysfunction even in its subclinical phase. The functional assessment of the fetal heart should be routinely performed in fetuses with congenital heart disease and those without anatomical malformation. Several extra-cardiac conditions may alter fetal cardiac function, by increased placental resistance, volume overload or hyperdynamic circulation, compression, or maternal systemic disease with involvement of the fetal myocardium...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28158932/the-association-of-neonatal-morbidity-with-long-term-neurological-outcome-in-infants-who-were-growth-restricted-and-preterm-at-birth-secondary-analyses-from-truffle-trial-of-randomized-umbilical-and-fetal-flow-in-europe
#14
A G Van Wassenaer-Leemhuis, N Marlow, C Lees, H Wolf
OBJECTIVE: To study the relationship between neonatal morbidity (NNM) and two-year neurodevelopmental impairment (NDI) in surviving children after early fetal growth restriction (FGR). DESIGN: Secondary analysis of a European randomised trial (TRUFFLE) of delivery for very preterm fetuses dependent on venous Doppler or cardiotocographic criteria. SETTING: Tertiary perinatal centres, participants in TRUFFLE. POPULATION: 402 surviving children after early FGR...
February 3, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28153658/first-trimester-alcohol-exposure-alters-placental-perfusion-and-fetal-oxygen-availability-affecting-fetal-growth-and-development-in-a-non-human-primate-model
#15
Jamie O Lo, Matthias C Schabel, Victoria H J Roberts, Xiaojie Wang, Katherine S Lewandowski, Kathleen A Grant, Antonio E Frias, Christopher D Kroenke
BACKGROUND: Prenatal alcohol exposure leads to impaired fetal growth, brain development, and stillbirth. Placental impairment likely contributes to these adverse outcomes, but the mechanisms and specific vasoactive effects of alcohol that links altered placental function to impaired fetal development remain areas of active research. OBJECTIVE: Recently, we developed magnetic resonance imaging techniques in nonhuman primates to characterize placental blood oxygenation through measurements of T2* and perfusion using dynamic contrast-enhanced magnetic resonance imaging...
March 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28138914/obstetric-and-perinatal-outcome-in-anti-ro-ssa-positive-pregnant-women-a-prospective-cohort-study
#16
Nuria Martínez-Sánchez, Sergio Pérez-Pinto, Ángel Robles-Marhuenda, Francisco Arnalich-Fernández, María Martín Cameán, Edurne Hueso Zalvide, Jose Luis Bartha
Anti-Ro/SS-A is one specific type of antinuclear antibodies. They are in the majority of cases associated with primary Sjögren syndrome (SS) but also in Systemic Lupus Erythematosus (SLE), rheumatoid arthritis (RA), and in healthy people. During pregnancy, they are mainly associated to congenital heart block (CHB) and neonatal lupus (NL). The aim of this study was to compare the rate of maternal and fetal complications between a series of anti-Ro/SS-A positive pregnant women prospectively followed. Forty-two anti-Ro/SSA antibodies positive pregnant women that were referred to our hospital between 2011 and 2015...
January 30, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28130433/the-association-of-maternal-thyroid-function-with-placental-hemodynamics
#17
M Barjaktarovic, T I M Korevaar, L Chaker, V W V Jaddoe, Y B de Rijke, T J Visser, E A P Steegers, R P Peeters
STUDY QUESTION: What is the clinical association of maternal thyroid function with placental hemodynamic function? SUMMARY ANSWER: A higher free thyroxine (FT4) concentration in early pregnancy is associated with higher placental vascular resistance. WHAT IS KNOWN ALREADY: Suboptimal placental function is associated with preeclampsia (which, in turn, further deteriorates placental hemodynamics and impairs the fetal blood supply), fetal growth restriction and premature delivery...
January 26, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28114884/everrest-prospective-study-a-6-year-prospective-study-to-define-the-clinical-and-biological-characteristics-of-pregnancies-affected-by-severe-early-onset-fetal-growth-restriction
#18
Rebecca Spencer, Gareth Ambler, Jana Brodszki, Anke Diemert, Francesc Figueras, Eduard Gratacós, Stefan R Hansson, Kurt Hecher, Angela Huertas-Ceballos, Neil Marlow, Karel Marsál, Eva Morsing, Donald Peebles, Carlo Rossi, Neil J Sebire, John F Timms, Anna L David
BACKGROUND: Fetal growth restriction (FGR) is a serious obstetric condition for which there is currently no treatment. The EVERREST Prospective Study has been designed to characterise the natural history of pregnancies affected by severe early onset FGR and establish a well phenotyped bio-bank. The findings will provide up-to-date information for clinicians and patients and inform the design and conduct of the EVERREST Clinical Trial: a phase I/IIa trial to assess the safety and efficacy of maternal vascular endothelial growth factor (VEGF) gene therapy in severe early onset FGR...
January 23, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28114843/the-impact-of-fetal-middle-cerebral-artery-doppler-on-the-outcome-of-congenital-hydrocephalus
#19
Nail Obeidat, Bahauddin Sallout, Badi Albaqawi, Wajeih Al AlAali
OBJECTIVES: The objective of this study is to investigate the impact of abnormal middle cerebral artery (MCA) Doppler on the perinatal mortality in fetuses with congenital hydrocephalus (CH). METHODS: A prospective study of all fetuses with CH who delivered at our hospital over a period of 7 years. Data were obtained from the ultrasound, Labor room and intensive neonatal care unit (NICU) database. The Perinatal mortality rates were evaluated in relation to the following measures, associated congenital anomalies, cortical mantle thickness (CMT), and MCA Doppler abnormalities (absent or reversed diastole)...
February 9, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28103875/effects-of-plasmodium-falciparum-infection-on-umbilical-artery-resistance-and-intrafetal-blood-flow-distribution-a-doppler-ultrasound-study-from-papua-new-guinea
#20
Maria Ome-Kaius, Stephan Karl, Regina Alice Wangnapi, John Walpe Bolnga, Glen Mola, Jane Walker, Ivo Mueller, Holger Werner Unger, Stephen John Rogerson
BACKGROUND: Doppler velocimetry studies of umbilical artery (UA) and middle cerebral artery (MCA) flow help to determine the presence and severity of fetal growth restriction. Increased UA resistance and reduced MCA pulsatility may indicate increased placental resistance and intrafetal blood flow redistribution. Malaria causes low birth weight and fetal growth restriction, but few studies have assessed its effects on uteroplacental and fetoplacental blood flow. METHODS: Colour-pulsed Doppler ultrasound was used to assess UA and MCA flow in 396 Papua New Guinean singleton fetuses...
January 19, 2017: Malaria Journal
keyword
keyword
29995
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"