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Vascular doppler

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https://www.readbyqxmd.com/read/28343011/ultrasound-characterization-of-ankle-involvement-in-l%C3%A3-fgren-syndrome
#1
Claire Goussault, Jean-David Albert, Guillaume Coiffier, François Lamer, Raphaël Guillin, Benoit Le Goff, Béatrice Bouvard, Emmanuelle Dernis, Marine Ferreyra, Grégoire Cormier, Pascal Guggenbuhl, Aleth Perdriger
BACKGROUND: Bilateral ankle arthritis is a classic diagnostic criterion for Löfgren syndrome. The objective of this study was to use ultrasonography to characterize the articular and peri-articular involvement of the ankles in patients with Löfgren syndrome. METHODS: Single-center descriptive cohort study of patients with Löfgren syndrome who underwent ultrasonography of the ankles. We collected clinical data, imaging study findings, blood test results, and joint fluid properties in patients who underwent joint aspiration...
March 22, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28342751/reproducibility-of-four-frequently-used-local-heating-protocols-to-assess-cutaneous-microvascular-function
#2
Kirsty A Roberts, Thijs van Gent, Nicola D Hopkins, Helen Jones, Ellen A Dawson, Richard Draijer, Howard H Carter, Ceri L Atkinson, Daniel J Green, Dick H J Thijssen, David A Low
BACKGROUND: Skin microvascular responses to local heating are frequently used to assess microvascular function. Several local heating protocols have been developed, all varying slightly in execution. The aim of this study was to determine the inter-day reproducibility of the four most commonly used local heating protocols in healthy young subjects. METHODS: Fifteen, healthy males (28±5yrs, BMI 25±2kg/m(2)) attended two experimental trials 2-7days apart. During each trial, baseline and maximal thermally stimulated forearm skin responses were examined simultaneously at four sites on the dominant forearm using laser Doppler flowmetry (LDF)...
March 22, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28341510/endovascular-stenting-of-portal-vein-for-graft-rescue-after-a-pancreas-transplant-venous-graft-thrombosis-a-case-report
#3
Ossama M Reslan, Jordan M Kirsch, Hitesh Kaul, Stalin Campos, Radi Zaki, Paul S Brady, Kamran Khanmoradi
Venous thrombosis of pancreas transplant allografts often leads to graft loss. Its worrisome complication and difficult to treat, forming the most common nonimmunological cause of graft loss. Multiple risk factors have been implicated in the development of venous thrombosis of pancreas transplant. Color Doppler ultrasonography (CDUS) enables early diagnosis of venous thrombosis, thus increasing the possibility of graft-rescue treatments. Endovascular management of pancreatic transplant vascular complications are scant and in the form of case reports...
March 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28340403/micro-and-macrovascular-function-in-children-with-sickle-cell-anaemia-and-sickle-cell-haemoglobin-c-disease
#4
Berenike Möckesch, Keyne Charlot, Stéphane Jumet, Marc Romana, Lydia Divialle-Doumdo, Marie-Dominique Hardy-Dessources, Marie Petras, Benoît Tressieres, Vanessa Tarer, Olivier Hue, Maryse Etienne-Julan, Philippe Connes, Sophie Antoine-Jonville
It is unclear whether vascular function is affected similarly in children with sickle cell anaemia (SS) and children with sickle haemoglobin C (SC) disease. Therefore, we compared micro and macrovascular functions in healthy (AA) children, children with SS and SC disease, and assessed their association with physical activity. Participants (24 SS, 22 SC and 16 AA), were compared in terms of 1) thermal hyperaemic response (finger pad warming to 42°C) measured by Laser Doppler techniques, 2) arterial stiffness determined by pulse wave velocity, 3) daily energy expenditure related to moderate and intense physical activities estimated by questionnaire and 4) fitness level, evaluated by the six-minute walk test...
February 4, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28340289/remote-ischaemic-conditioning-decreases-blood-flow-and-improves-oxygen-extraction-in-patients-with-early-complex-regional-pain-syndrome
#5
T Hegelmaier, N Kumowski, T Mainka, J Vollert, O Goertz, M Lehnhardt, P K Zahn, C Maier, J Kolbenschlag
BACKGROUND: Remote ischaemic conditioning (RIC) is the cyclic application of non-damaging ischaemia leading to an increased tissue perfusion, among others triggered by NO (monoxide). Complex regional pain syndrome (CRPS) is known to have vascular alterations such as increased blood shunting and decreased NO blood-levels, which in turn lead to decreased tissue perfusion. We therefore hypothesized that RIC could improve tissue perfusion in CRPS. METHOD: In this proof-of-concept study, RIC was applied in the following groups: in 21 patients with early CRPS with a clinical history less than a year, in 20 age/sex-matched controls and in 12 patients with unilateral nerve lesions via a tourniquet on the unaffected/non-dominant upper limb...
March 24, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28340234/detection-of-severe-digital-vasculopathy-in-systemic-sclerosis-by-colour-doppler-sonography-is-associated-with-digital-ulcers
#6
Susanne Lüders, Stefanie Friedrich, Sarah Ohrndorf, Anne-Marie Glimm, Gerd-Rüdiger Burmester, Gabriela Riemekasten, Marina Backhaus
Objective.: Colour Doppler ultrasonography (CDUS) is very important in general vascular diagnostic procedures. Its role in determining the extent of vasculopathy in Systemic Sclerosis (SSc) needs further investigation. The aim of this study was to compare the presence of altered arteries with nailfold capillaroscopy and clinical signs of ischaemia, that is, digital ulcers or pitting scars (DU/PS). A feasible CDUS protocol is provided. Methods.: Two thousand five hundred and twenty-eight arteries of the fingers, palms and wrists from 79 SSc patients (32 arteries per patient) were examined using CDUS...
March 17, 2017: Rheumatology
https://www.readbyqxmd.com/read/28336398/modulation-of-mammary-tumor-vascularization-by-mast-cells-ultrasonographic-and-histopathological-approaches
#7
Ana I Faustino-Rocha, Adelina Gama, Paula A Oliveira, Katrien Vanderperren, Jimmy H Saunders, Maria J Pires, Rita Ferreira, Mário Ginja
AIMS: The inhibition of mast cells' degranulation may be an approach to prevent the formation of new vessels during the mammary carcinogenesis. MATERIALS AND METHODS: Female Sprague-Dawley rats were randomly divided into five experimental groups. Mammary tumors were induced by intraperitoneal injection of N-methyl-N-nitrosourea (MNU). Animals from group II were treated with ketotifen for 18weeks immediately after the MNU administration, while animals from group III only received the ketotifen after the development of the first mammary tumor...
March 20, 2017: Life Sciences
https://www.readbyqxmd.com/read/28335685/preterm-delivery-as-a-unique-pathophysiologic-state-characterized-by-maternal-soluble-fms-like-tyrosine-kinase-1-and-uterine-artery-resistance-during-pregnancy
#8
Jennifer K Straughen, Dawn P Misra, Laura Helmkamp, Vinod K Misra
BACKGROUND: Preterm delivery (PTD) may be characterized by altered interrelationships among angiogenic factors and measures of placental function. We analyzed the longitudinal relationship between maternal serum concentrations of soluble fms-like tyrosine kinase 1 (sFlt1), an important antiangiogenic factor, and uterine artery resistance in pregnancies resulting in preterm and term deliveries. METHODS: Data were collected in a longitudinal cohort study involving 278 women monitored at 6 to 10, 10 to 14, 16 to 20, 22 to 26, and 32 to 36 weeks of gestation...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28335669/the-experience-of-modified-sequential-selective-laser-photocoagulation-of-communicating-vessels-technique-for-twin-twin-transfusion-syndrome
#9
Susumu Murata, Mayumi Takano, Yukiko Kagawa, Masahiro Sumie, Masahiko Nakata
OBJECTIVE: Fetoscopic laser photocoagulation of vascular anastomoses is the essential choice in twin-twin transfusion syndrome (TTTS). We proposed that the modified sequential selective laser photocoagulation of communicating vessels (modified SQLPCV) to clarify the perinatal outcomes in TTTS. METHODS: The modified SQLPCV was designed with the following order: 1, artery-to-artery anastomoses; 2, venous-to-venous anastomoses; 3, artery-to-venous anastomoses from donor to recipient; and 4, artery-to-venous anastomoses from recipient to donor...
March 23, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28332278/a-comparative-study-of-the-effects-of-intramuscular-administration-of-gonadorelin-mating-and-intrauterine-infusion-of-either-raw-seminal-plasma-or-seminal-plasma-purified-%C3%AE-ngf-on-luteal-development-in-llamas
#10
M Silva, F Urra, C Ulloa-Leal, M H Ratto
The aim of this study was to compare the effect of the intramuscular administration of 50 μg of gonadorelin acetate versus natural mating, intrauterine infusion (i.u.) of a physiological relevant dose of either raw llama seminal plasma (SP) or purified beta-nerve growth factor from seminal origin (spβ-NGF) on ovulation rate and corpus luteum (CL) development and function in llamas. Females with a follicle (≥8 mm) were assigned to groups: (i) i.m. administration of 50 μg of gonadorelin acetate (GnRH; positive control; n = 4); (ii) single mating (mating; n = 6); (iii) i...
March 22, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28330415/novel-detection-of-placental-insufficiency-by-magnetic-resonance-imaging-in-the-nonhuman-primate
#11
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/28328938/tissue-factor-pathway-inhibitor-for-prediction-of-placenta-mediated-adverse-pregnancy-outcomes-in-high-risk-women-angiopred-study
#12
Aurélie Di Bartolomeo, Céline Chauleur, Jean-Christophe Gris, Céline Chapelle, Edouard Noblot, Silvy Laporte, Tiphaine Raia-Barjat
OBJECTIVE: The study aimed to evaluate if the rate of tissue factor pathway inhibitor during pregnancy and following delivery could be a predictive factor for placenta-mediated adverse pregnancy outcomes in high-risk women. METHODS: This was a prospective multicentre cohort study of 200 patients at a high risk of occurrence or recurrence of placenta-mediated adverse pregnancy outcomes conducted between June 2008 and October 2010. Measurements of tissue factor pathway inhibitor resistance (normalized ratio) and tissue factor pathway inhibitor activity were performed for the last 72 patients at 20, 24, 28, 32, and 36 weeks of gestation and during the postpartum period...
2017: PloS One
https://www.readbyqxmd.com/read/28324353/the-fast-d-protocol-a-simple-method-to-rule-out-traumatic-vascular-injuries-of-the-lower-extremities
#13
Miguel Angel Montorfano, Lisandro Miguel Montorfano, Federico Perez Quirante, Federico Rodríguez, Leonardo Vera, Luca Neri
BACKGROUND: The aim of this study is to assess the accuracy of a Fast Doppler protocol for the examination of an injured lower limb, namely 2-Point Fast Doppler (2PFD), in order to rapidly triage arterial lesions after penetrating trauma. METHODS: The presence of flow and the aspects of the Doppler waveform of the dorsalis pedis artery (DPA) and posterior tibial artery (PTA) of the injured lower limb (2PFD) were evaluated immediately before the execution of a standardized Color Duplex Doppler (SD) evaluation in 149 limbs of 140 patients with gunshot penetrating injuries...
December 2017: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/28320891/the-normal-ranges-of-cardiovascular-parameters-measured-using-the-ultrasonic-cardiac-output-monitor
#14
Giles N Cattermole, P Y Mia Leung, Grace Y L Ho, Peach W S Lau, Cangel P Y Chan, Stewart S W Chan, Brendan E Smith, Colin A Graham, Timothy H Rainer
The ultrasonic cardiac output monitor (USCOM) is a noninvasive transcutaneous continuous wave Doppler method for assessing hemodynamics. There are no published reference ranges for normal values in adults (aged 18-60 years) for this device. This study aimed to (1) measure cardiovascular indices using USCOM in healthy adults aged 18-60 years; (2) combine these data with those for healthy children (aged 0-12), adolescents (aged 12-18), and the elderly (aged over 60) from our previously published studies in order to present normal ranges for all ages, and (3) establish normal ranges of USCOM-derived variables according to both weight and age...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28316167/-influences-of-high-voltage-electrical-burns-on-microcirculation-perfusion-on-serosal-surface-of-small-intestine-of-rats-and-the-interventional-effects-of-pentoxifylline
#15
Q F Zhang, S J Xu, L M Liang, J K Feng, Y F Xu, L L Tu
Objective: To investigate influences of high-voltage electrical burns on microcirculation perfusion on serosal surface of small intestine of rats and the interventional effects of pentoxifylline (PTX). Methods: Totally 180 SD rats were divided into sham injury group, simple electrical burn group, and treatment group according to the random number table, with 60 rats in each group. The electrical current was applied to the outside proximal part of left forelimb of rats and exited from the outside proximal part of right hind limb of rats...
March 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28315648/morphologic-and-doppler-findings-from-hepatic-ultrasonography-of-normal-cynomolgus-monkeys-macaca-fascicularis
#16
Kyo Won Lee, Chan Woo Cho, Ji Eun Lee, Hyojun Park, Gyu-Seong Choi, Woo Kyoung Jeong, Jae Berm Park, Sungjoo Kim
The present study evaluated the anatomic and ultrasonographic features of the liver in normal cynomolgus monkeys (Macaca fascicularis). Healthy, male, cynomolgus monkeys from Cambodia (n = 25; mean age, 58.1 mo) were sedated with ketamine (7 mg/kg) and examined by using 2D and Doppler ultrasonography. We measured the diameters of the vascular structures and bile duct, determined the velocities of the hepatic artery and portal vein, and calculated the resistance index of the hepatic artery. Vessel diameters were: proper hepatic artery, 1...
March 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28315202/validation-of-bevacizumab-therapy-effect-on-colon-cancer-subtypes-by-using-whole-body-imaging-in-mice
#17
Ivan Vuletic, Kedi Zhou, Hui Li, Huichen Bai, Xiangxi Meng, Sihao Zhu, Yichen Ding, Jun Li, Hongfang Sun, Qiushi Ren
PURPOSE: Preclinical imaging offers a useful tool for monitoring cancer biological behavior and therapy in vivo without the necessity of animal surgery. The following paper describes our examination of tumor progress and anti-angiogenic therapy with Bevacizumab on colon cancer subtypes (SW480 and SW620) by using different non-invasive real-time in vivo imaging techniques. PROCEDURES: Color Doppler ultrasound imaging (CDUI) was used to observe the formation of new blood vessels; a homemade fluorescence reflectance imaging (FRI) apparatus was mainly used to test the difference in VEGFR2 expression between the tumor subtypes...
March 17, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28306539/three-dimensional-power-doppler-of-the-placenta-and-its-clinical-applications
#18
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/28306228/diagnosis-natural-history-and-management-in-vascular-ehlers-danlos-syndrome
#19
Peter H Byers, John Belmont, James Black, Julie De Backer, Michael Frank, Xavier Jeunemaitre, Diana Johnson, Melanie Pepin, Leema Robert, Lynn Sanders, Nigel Wheeldon
Vascular Ehlers Danlos syndrome (vEDS) is an uncommon genetic disorders characterized by arterial aneurysm, dissection and rupture, bowel rupture, and rupture of the gravid uterus. The frequency is estimated as 1/50,000-1/200,000 and results from pathogenic variants in COL3A1, which encodes the chains of type III procollagen, a major protein in vessel walls and hollow organs. Initial diagnosis depends on the recognitions of clinical features, including family history. Management is complex and requires multiple specialists who can respond to and manage the major complications...
March 2017: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/28303670/a-randomized-comparison-of-modified-subcutaneous-z-stitch-versus-manual-compression-to-achieve-hemostasis-after-large-caliber-femoral-venous-sheath-removal
#20
Radoslaw Pracon, Sripal Bangalore, Jan Henzel, Iwona Cendrowska-Demkow, Barbara Pregowska-Chwala, Agnieszka Tarnowska, Zofia Dzielinska, Zbigniew Chmielak, Adam Witkowski, Marcin Demkow
OBJECTIVES: To compare subcutaneous "Z"-stitch versus manual compression in attaining hemostasis after large bore femoral venous access, and to assess its impact on venous patency. BACKGROUND: Structural interventions increasingly require large caliber venous access, for which convenient, safe, and effective method of postprocedural hemostasis is needed. "Z"-stitch has been introduced for this purpose in some centers but systematic data on its performance is limited...
March 17, 2017: Catheterization and Cardiovascular Interventions
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