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uterine Doppler ultrasound

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https://www.readbyqxmd.com/read/27883242/sflt-1-plgf-for-early-onset-pre-eclampsia-prediction-steps-study-of-early-pre-eclampsia-in-spain
#1
A Perales, J L Delgado, M De La Calle, J A García-Hernández, A I Escudero, J M Campillos, M D Sarabia, B Laíz, M Duque, M Navarro, P Calmarza, M Hund, F V Álvarez
OBJECTIVES: A high ratio of soluble fms-like tyrosine kinase-1 (sFlt-1) to placental growth factor (PlGF) has been linked with pre-eclampsia (PE). We evaluated the sFlt-1/PlGF ratio as a predictive marker for early-onset PE in women at risk of PE. METHODS: This prospective, Spanish, multicenter study included pregnant women with PE risk factors (including: history of intrauterine growth restriction; PE; eclampsia; hemolysis, elevated liver enzymes and low platelet count syndrome; pre-gestational diabetes; and abnormal uterine artery Doppler ultrasound)...
November 24, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27862084/intra-and-inter-observer-reproducibility-and-generalizability-of-first-trimester-uterine-artery-pulsatility-index-by-transabdominal-and-transvaginal-ultrasound
#2
Laura Marchi, Eva Zwertbroek, Judith Snelder, Maaike Kloosterman, Caterina Maddalena Bilardo
OBJECTIVES: The primary aim of the study was to assess intra-observer and inter-observer reproducibility and generalizability (general reliability) of first trimester Doppler measurements of uterine arteries (UtA) performed both transabdominally (TA) and transvaginally (TV). Secondary aims were to investigate whether maternal BMI and acquisition modality (transabdominal or transvaginal) affect feasibility and reliability of UtA Doppler evaluation. METHODS: Singleton pregnancies between 11(+0) and 13(+6) weeks underwent TA and TV Doppler measurements of UtA prospectively, blindly and independently by Fetal Medicine Foundation-accredited operators...
November 16, 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/27845691/non-invasive-evaluation-of-placental-blood-flow-lessons-from-animal-models
#3
Eve Mourier, Anne Tarrade, Jie Duan, Christophe Richard, Charline Bertholdt, Marine Beaumont, Olivier Morel, Pascale Chavatte-Palmer
In human obstetrics, placental vascularisation impairment is frequent as well as linked to severe pathological events (preeclampsia and intra-uterine growth restriction) and there is a need for reliable methods allowing non-invasive evaluation of placental blood flow. Uteroplacental vascularisation is complex and animal models are essential for the technical development and safety assessment of these imaging tools for human clinical use but these techniques can also be applied in the veterinary context. This paper reviews how ultrasound based imaging methods such as 2D and 3D Doppler can provide valuable insight for the exploration of placental blood flow both in humans and animals and how new approaches such as the use of ultrasound contrast agents or ultrafast Doppler may allow to discriminate between maternal (non-pulsatile) and fetal (pulsatile) blood flow in the placenta...
November 14, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27824563/adaptive-spectral-envelope-estimation-for-doppler-ultrasound
#4
Aditi Kathpalia, Yucel Karabiyik, Sturla H Eik-Nes, Eva Tegnander, Ingvild Kinn Ekroll, Gabriel Kiss, Hans Torp
Estimation of accurate maximum velocities and spectral envelope in ultrasound Doppler blood flow spectrograms are both essential for clinical diagnostic purposes. However, obtaining accurate maximum velocity is not straightforward due to intrinsic spectral broadening and variance in the power spectrum estimate. The method proposed in this paper for maximum velocity point detection has been developed by modifying an existing method-signal noise slope intersection, incorporating in it steps from an altered version of another method called geometric method...
November 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27804175/pilot-study-of-mri-us-fusion-in-the-assessment-of-the-cesarean-section-scar-in-the-postpartum-period
#5
Kristina Bolten, Thomas Fischer, Yvonne Yi-Na Bender, Gerd Diederichs, Anke Thomas
OBJECTIVES: To prospectively evaluate the uterine scar after Cesarean section (CS) as well as the corresponding uterine region after vaginal delivery (VD) at 6 weeks using transabdominal (TAUS) and transvaginal ultrasound (TVUS) and magnetic resonance imaging (MRI)/US image fusion to investigate whether image fusion allows standardized and reproducible localization of the scar and uterine wall thickness measurement compared with high-resolution MRI. METHODS: Six weeks after delivery, plain pelvic MRI (was performed in 30 women (10 each after planned Cesarean section (PCS), emergency Cesarean section (ECS), and VD)...
November 2, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27761197/endometrial-stromal-sarcoma-an-aggressive-uterine-malignancy
#6
Chaitra P Adiga, Manju Gyanchandani, Lakshmikantha N Goolahally, Rishikesh M Itagi, Kiran V Kalenahalli
Endometrial stromal sarcoma (ESS) is an aggressive uterine sarcoma. We report a case of a large endometrial stromal sarcoma in a 42 year nulliparous woman with chronic kidney disease presenting with acute urinary retention and irregular per vaginal bleeding. Ultrasound and Doppler imaging revealed a heterogeneous mass in the endometrial cavity with internal vascularity. Magnetic resonance imaging (MRI) revealed a large lobulated mass in the endometrial cavity extending into the vagina, causing local mass effect...
September 2016: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/27759452/predicting-of-successful-implantation-at-ivf-cycles
#7
E A Devyatova, K A Tsaturova, E V Vartanyan
Many of the uterine infertility factors are associated with chronic endometritis. Its prevalence reaches 92.6%. Quality of endometrial transformation during the "implantation window" is the basis of successful fertility. In our retrospective comparative study of 101 in vitro fertilization (IVF) cycles, the efficacy of transvaginal Doppler ultrasound (TVDUS) in predicting successful implantation was evaluated. Inclusion criteria were as follows: age younger than 41 years and good quality of embryos. Exclusion criteria were as follows: 41 and older age, poor quality of embryos and uterine cavity lesions...
October 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27739590/n-acetyl-cysteine-a-glutathione-precursor-reverts-vascular-dysfunction-and-endothelial-epigenetic-programming-in-intrauterine-growth-restricted-guinea-pigs
#8
Emilio A Herrera, Francisca Cifuentes-Zúñiga, Esteban Figueroa, Cristian Villanueva, Cherie Hernández, René Alegría, Viviana Arroyo, Estefania Peñaloza, Marcelo Farías, Ricardo Uauy, Paola Casanello, Bernardo J Krause
In humans, intrauterine growth restriction (IUGR) is associated with vascular dysfunction, oxidative stress and signs of endothelial programming in umbilical vessels. We aimed to determine the effects of maternal antioxidant treatment with N-acetyl cysteine (NAC) on fetal endothelial function and eNOS programming in IUGR guinea pigs. IUGR was induced by implanting ameroid constrictors on uterine arteries of pregnant guinea pigs at mid gestation, receiving half of the sows NAC in the drinking water (from day 34 until term)...
October 14, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27684833/use-of-the-glidescope-video-laryngoscope-for-intubation-during-ex-utero-intrapartum-treatment-in-a-fetus-with-a-giant-cyst-of-the-4th-branchial-cleft-a-case-report
#9
Sung Hye Byun, So Young Lee, Seong Yeon Hong, Taeha Ryu, Baek Jin Kim, Jin Yong Jung
INTRODUCTION: In fetuses who are predicted to be at risk of catastrophic airway obstruction at delivery, the ex utero intrapartum treatment (EXIT) procedure is useful for securing the fetal airway while maintaining fetal oxygenation via placental circulation. Factors, including poor posture of the fetus and physician, narrow visual field, and issues of contamination in the aseptic surgical field, make fetal intubation during the EXIT procedure difficult. Herein, we report our experience of the usefulness of the GlideScope video laryngoscope (GVL) for intubation during the EXIT procedure...
September 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27661402/placental-implantation-abnormalities-a-modern-approach
#10
Sevan A Vahanian, Anthony M Vintzileos
PURPOSE OF REVIEW: Placental implantation abnormalities (PIAs) comprise a large group of disorders associated with significant maternal, fetal, and neonatal morbidity. RECENT FINDINGS: Risk factors include prior uterine surgery/myometrial scarring and the presence of placenta previa with or without prior cesarean delivery. Newly identified risk factors include previous prelabor cesarean delivery and previous postpartum hemorrhage. PIAs contribute substantially to preterm birth with prematurity rates ranging from 38 to 82%...
December 2016: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27647554/ep23-07-ultrasound-colour-doppler-diagnosis-of-uterine-rupture-after-previous-laparoscopic-myomectomy
#11
V Del Vecchio, A Chincoli, A de Gennaro, D Casiero, A Vimercati
No abstract text is available yet for this article.
September 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27639435/-repeated-in-vitro-fertilization-failure-abnormalities-identified-in-the-diagnostic-assessment
#12
M Lambert, C Hocké, C Jimenez, S Frantz, A Papaxanthos, H Creux
OBJECTIVES: Investigate the proportion of abnormalities identified on the diagnostic assessment performed after at least two previous failed IVF attempts. Discuss the real benefit of this evaluation. METHODS: Retrospective descriptive study. Between January 2008 and January 2012, 205 couples with at least two consecutive failed IVF attempts had a diagnosis evaluation which consisted in couple's karyotypes; autoimmune and haemostasis biological check-up, pelvic ultrasound-Doppler and hysteroscopy for women...
September 14, 2016: Gynécologie, Obstétrique & Fertilité
https://www.readbyqxmd.com/read/27629133/comparison-of-uterine-endometrial-and-ovarian-blood-flow-by-transvaginal-color-doppler-ultrasound-in-ovulatory-and-anovulatory-cycles
#13
Ozan Dogan, Ahmet Yildiz, Osman Temizkan, Cigdem Pulatoglu
OBJECTIVES: Blood flow to uterus and ovaries is demonstrated to be altered during mensturation. Studies has been published stating that blood flow differs also in ovulatory and anovulatory cycles. In this study, using color Doppler ultrasound, we aim to compare uterine, endometrial and ovarian blood flow during ovulatory and anovulatory cycles. MATERIAL AND METHODS: Women volunteers who are aged between 18-40 had no endocrinological problem and not recieving exogenous hormone therapy were included to study...
2016: Ginekologia Polska
https://www.readbyqxmd.com/read/27624545/circulating-free-soluble-fms-like-tyrosine-kinase-1-during-late-first-trimester-in-relation-with-placental-volume-as-a-surrogate-for-trophoblastic-production-a-physiology-study-in-low-risk-cohort
#14
Sudtawin Manthati, Busadee Pratumvinit, Ratchaneekorn Hanyongyuth, Suthipol Udompunthurak, Amprapha Phaophan, Tuangsit Wataganara
BACKGROUND: Data on first-trimester circulating soluble fms-like tyrosine kinase-1 (sFlt-1) and ischemic placental disease is limited and conflicting. This study aimed to study its physiology in relation to trophoblastic mass as the source of production. METHODS: Low-risk (representing normal placentation) women from 11 0/7 to 13 6/7 weeks' gestation were prospectively enrolled. Selective measurement of serum free sFlt-1 using a new automated assay from 100 eligible subjects was analyzed with gestational age, maternal weight, fetal crown-rump length (CRL), and mean uterine artery Doppler pulsatility index (PI)...
September 14, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27617440/two-cases-of-true-uterine-artery-aneurysms-diagnosed-during-pregnancy
#15
Jacob Mørup Schlütter, Gry Johansen, Rikke Bek Helmig, Olav Bjørn Petersen
We report 2 cases of true uterine artery aneurysms diagnosed during pregnancy. Both cases presented with nonspecific symptoms such as urethral obstruction, minimal vaginal bleeding and lower abdominal pain in the 2nd trimester. Both aneurysms were diagnosed by color Doppler ultrasound. In the first case labor was induced at 37 + 4 weeks of gestation. However, due to sudden fetal distress and maternal abdominal pain, an emergency Caesarean section was performed during labor, and 3 liters of intra-peritoneal blood were encountered upon laparotomy, secondary to a ruptured uterine artery aneurysm...
September 13, 2016: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/27597909/bleeding-versus-clotting-a-complex-case-of-a-large-fibroid-uterus-causing-menorrhagia-and-a-dvt
#16
Sangeeta Ramanan, Jude Chapman-Wardy, Roy Watson
A 43-year-old woman presented with severe anaemia secondary to menorrhagia. Pelvic ultrasound showed a large intramural posterior fundal fibroid. Hysteroscopy showed the fibroid distorting the endometrial cavity, precluding Mirena® device insertion. As she was initially hesitant to have a hysterectomy, medical management with the oral contraceptive pill (OCP) and tranexamic acid was instituted, with good effect. Months later, after a long road trip, she presented with left leg swelling, and a Doppler ultrasound confirmed an extensive deep vein thrombosis (DVT)...
2016: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27588413/mid-pregnancy-fetal-growth-uteroplacental-doppler-indices-and-maternal-demographic-characteristics-role-in-prediction-of-stillbirth
#17
Alessandra Familiari, Carolina Scala, Maddalena Morlando, Amar Bhide, Asma Khalil, Basky Thilaganathan
INTRODUCTION: To evaluate the relative value of mid trimester fetal growth, uterine artery (UtA) Doppler indices and maternal demographics in prediction of stillbirth. MATERIAL AND METHODS: Retrospective cohort study; 23,894 singleton pregnancies routinely scanned between 19 and 24 weeks' gestation. Maternal characteristics included age, body mass index, ethnicity and medical history. Fetal biometry indices, birthweight and UtA pulsatility index (PI) values were converted to percentiles and multivariable logistic regression analysis was performed...
September 2, 2016: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/27577707/3d-power-doppler-ultrasound-assessment-of-placental-perfusion-during-uterine-contraction-in-labor
#18
Miki Sato, Junko Noguchi, Masato Mashima, Hirokazu Tanaka, Toshiyuki Hata
INTRODUCTION: To assess placental perfusion during spontaneous or induced uterine contraction in labor at term using placental vascular sonobiopsy (PVS) by 3D power Doppler ultrasound with the VOCAL imaging analysis program. METHOD: PVS was performed in 50 normal pregnancies (32 in spontaneous labor group [SLG], and 18 in induced labor group with oxytocin or prostaglandin F2α [ILG]) at 37-41 weeks of gestation to assess placental perfusion during uterine contraction in labor...
September 2016: Placenta
https://www.readbyqxmd.com/read/27576196/evaluation-of-feline-uterine-and-umbilical-arteries-blood-flow-in-a-pharmacologically-induced-abnormal-gestation-model
#19
P G Blanco, R Vercellini, A Rube, R Rodríguez, D O Arias, C Gobello
The aim of this study was to describe resistance index (RI) and systolic/diastolic ratio (S/D ratio) of uterine and umbilical arteries in an experimental model of abnormal pregnancy in felids. On days 30 to 35 (32 ± 2.9) after mating, 20 domestic short-hair pregnant queens were randomly assigned to one of the following treatment groups: a treated group (TG; n = 8), which received 10 mg/kg of aglepristone subcutaneously twice, 24 hours apart, and a control nontreated group (CG; n = 12). M-mode and Doppler ultrasonographic evaluations were performed at the initiation of the treatment (Day 0) and then every other day during 8 days...
August 4, 2016: Theriogenology
https://www.readbyqxmd.com/read/27552173/the-effect-of-prenatally-administered-vaginal-progesterone-on-uterine-artery-doppler-in-asymptomatic-twin-pregnancies
#20
Isabela K R Agra, Maria L Brizot, Mariana Y Miyadahira, Mário H B Carvalho, Rossana P V Francisco, Marcelo Zugaib
OBJECTIVES: This study investigated the influence of vaginal progesterone on uterine circulation in asymptomatic twin gestations. STUDY DESIGN: This study was a secondary analysis of a randomized, double-blind, placebo-controlled trial of twin pregnancies exposed to vaginal progesterone or placebo. We included all trial participants who had undergone uterine artery pulsatility index evaluation at the time of randomization. During each ultrasound examination, the uterine artery pulsatility index was evaluated transabdominally...
October 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
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