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Vascular doppler

Kumari M Rathnayake, Michelle Weech, Kim G Jackson, Julie A Lovegrove
Background: Elevated postprandial triacylglycerol concentrations, impaired vascular function, and hypertension are important independent cardiovascular disease (CVD) risk factors in women. However, the effects of meal fat composition on postprandial lipemia and vascular function in postmenopausal women are unknown. Objective: This study investigated the impact of sequential meals rich in saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), or n-6 (ω-6) polyunsaturated fatty acids (PUFAs) on postprandial flow-mediated dilatation (FMD; primary outcome measure), vascular function, and associated CVD risk biomarkers (secondary outcomes) in postmenopausal women...
March 1, 2018: Journal of Nutrition
Derick Okwan-Duodu, Laura Hansen, Giji Joseph, Alicia N Lyle, Daiana Weiss, David R Archer, W Robert Taylor
OBJECTIVE: The adaptive response to vascular injury is the formation of functional collateral vessels to maintain organ integrity. Many of the clinical complications associated with sickle cell disease can be attributed to repeated bouts of vascular insufficiency, yet the detailed mechanisms of collateral vessel formation after injury are largely unknown in sickle cell disease. Here, we characterize postischemic neovascularization in sickle cell disease and the role of neutrophils in the production of reactive oxygen species...
March 15, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
Ramon Roca-Tey, José Ibeas, Teresa Moreno, Enrique Gruss, José Luis Merino, Joaquín Vallespín, David Hernán, Patricia Arribas
The Spanish Multidisciplinary Group on Vascular Access (GEMAV), which includes experts from the five scientific societies involved (nephrology (S.E.N.), vascular surgery (SEACV), interventional radiology (SERAM-SERVEI), infectious diseases (SEIMC), and nephrology nursing (SEDEN)), along with the methodological support of the Iberoamerican Cochrane Centre, has developed the Spanish Clinical Guidelines on Vascular Access for Hemodialysis. This article summarizes the main issues from the guideline's chapter entitled "Monitoring and surveillance of arteriovenous access...
March 1, 2018: Journal of Vascular Access
R Cuthbert, C Deutsch, A Roy, P Stimpson, H Patel
Introduction The free jejunal flap represents the gold standard for circumferential defects in upper digestive tract reconstruction. It is a technically demanding procedure with significant failure rates. Unrecognised failure leads to flap necrosis and potentially fatal sequelae, including sepsis and carotid artery bleed. Despite these catastrophic consequences, however, there remains no consensus on an optimum method for postoperative flap monitoring. Our unit has pioneered the use of external colour duplex ultrasound to monitor flap vascularity...
March 15, 2018: Annals of the Royal College of Surgeons of England
Xuanliang Pan, Guoxian Chen, Pan Wu, Chunmao Han, Jon Kee Ho
Skin perfusion pressure (SPP) is the blood pressure that is the requisite for the restoration of microcirculatory or capillary flow following controlled occlusion and subsequent flow return. The purpose of the current review was to evaluate the value of SPP for the prediction of wound healing in patients with limb ischemia. Articles published up to January 31, 2017 were searched in the PubMed database and Chinese database CNKI, using the keywords of 'skin perfusion pressure', 'limb ischemia' and 'wound healing'...
April 2018: Biomedical Reports
Antonietta Gigante, Luca Navarini, Domenico Margiotta, Biagio Barbano, Antonella Afeltra, Edoardo Rosato
OBJECTIVES: In systemic sclerosis (SSc), vascular injury leads to endothelial dysfunction with reduced capillary blood flow and tissue hypoxia. In SSc the angiogenesis is impaired and implicated in the microvascular damage. In severe vascular damage VEGF is reduced and endostatin is increased. Aim of this study was to evaluate the correlation between endostatin serum levels and microvascular and digital arteries damage. METHODS: Seventeen SSc patients were enrolled in this study...
March 14, 2018: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
Misun Hwang, Matthew A Thimm, Anthony L Guerrerio
PURPOSE: Cavernous transformation of the portal vein can be missed on color Doppler exam or arterial phase cross-sectional imaging due to their slow flow and delayed enhancement. Contrast-enhanced ultrasound (CEUS) offers many advantages over other imaging techniques and can be used to successfully detect cavernous transformations of the portal vein. METHODS: A 10-month-old female was followed for repeat episodes of hematemesis. Computed tomography angiography (CTA) and magnetic resonance arteriogram (MRA) and portal venography were performed...
March 13, 2018: Journal of Ultrasound
Daniel Høyer Iversen, Lasse Løvstakken, Geirmund Unsgård, Ingerid Reinertsen
PURPOSE: In neurosurgery, reliable information about blood vessel anatomy and flow direction is important to identify, characterize, and avoid damage to the vasculature. Due to ultrasound Doppler angle dependencies and the complexity of the vascular architecture, clinically valuable 3-D flow direction information is currently not available. In this paper, we aim to clinically validate and demonstrate the intraoperative use of a fully automatic method for estimation of 3-D blood flow direction from freehand 2-D Doppler ultrasound...
March 13, 2018: International Journal of Computer Assisted Radiology and Surgery
Mert Ozan Bahtiyar, Emre Ekmekci, Emine Demirel, Roxanna A Irani, Joshua A Copel
Monochorionic twin pregnancies are at risk of unique complications due to placental sharing and vascular connections between placental territories assigned for each twin. Twin anemia-polycythemia sequence (TAPS) is an infrequent but potentially dangerous complication of abnormal placental vascular connections. TAPS occurs due to very-small-caliber (< 1 mm) abnormal placental vascular connections which lead to chronic anemia in the donor twin and polycythemia in the recipient twin. TAPS may occur spontaneously or following fetoscopic laser photocoagulation of communicating placental vessels for twin-twin transfusion syndrome...
March 13, 2018: Fetal Diagnosis and Therapy
Sathasivam Sureshkumar, Narayan Vignesh, J Venkatachalam, Chellappa Vijayakumar, Sundaramurthi Sudharsanan
Background The color Doppler, a better investigation to identify the perforators objectively has replaced the clinical examination for the same. However, this has led to a significant number of negative explorations and cosmetic disfigurement. Objective To compare the efficacy of the clinical tests combined with the color Doppler versus color Doppler alone to identify the perforator incompetence during the surgery for primary varicose veins of the lower limb. Methods This was a prospective analytical study, including 61 lower limb varicose vein patients who belonged to the Clinical-Etiology-Anatomy-Pathophysiology (CEAP) class four-six, planned for the surgical treatment for perforator incompetence, excluding those requiring additional vascular or nonvascular procedure, recurrent varicose veins and those who had injection sclerotherapy prior to the surgery...
January 5, 2018: Curēus
Aurélie Najm, Carl Orr, Lorna Gallagher, Monika Biniecka, Emeline Gaigneux, Benoit Le Goff, Ursula Fearon, Douglas J Veale
Objectives: Ultrasonography (US) is a fast, available and low-cost imaging tool used for detecting knee synovitis. Our aims were to assess the relationship between US and histology findings in appraising levels of inflammation and vascularity in the knee joint in subjects with inflammatory arthropathies; to determine whether differences exist in the appraisal between varying knee compartments and to compare US performances compared with gold standard histology for knee synovitis detection...
2018: RMD Open
Francesco Macrì, Simona Di Pietro, Cyndi Mangano, Michela Pugliese, Giuseppe Mazzullo, Nicola M Iannelli, Vito Angileri, Simona Morabito, Massimo De Majo
BACKGROUND: In veterinary medicine, contrast-enhanced ultrasonography allowed the accurate quantification of liver, splenic and kidney vascularization in healthy dogs and the differentiation between malignant and benign hepatic, renal, and splenic nodules in dogs and cats based on perfusion patterns. The utility of contrast-enhanced ultrasonography in other applications is still under study. The aim of this study was to develop diagnostic criteria by contrast-enhanced ultrasonography in 8 client-owned adult dogs affected by urinary bladder transitional cell carcinoma with definitive diagnosis made by cytopathologic evaluation after suction biopsy...
March 12, 2018: BMC Veterinary Research
Ángel Herráiz-Adillo, Iván Cavero-Redondo, Celia Álvarez-Bueno, Johana Bidner, Vicente Martínez-Vizcaíno, Blanca Notario-Pacheco
BACKGROUND AND AIMS: The diagnostic performance of the oscillometric ankle brachial index (ABI) to detect peripheral arterial disease (PAD) varies among populations, suggesting a spectrum effect. When this heterogeneity modifies post-test probabilities, a spectrum bias arises. This study evaluates the presence and influence of spectrum effect and spectrum bias on test performance and clinical decisions. METHODS: Oscillometric and Doppler ABI were compared in two settings: Primary-Care (333 legs) and Vascular-Service (41 legs)...
March 2, 2018: Atherosclerosis
Piotr Dobrowolski, Magdalena Januszewicz, Anna Klisiewicz, Aleksander Prejbisz, Ewa Warchoł-Celińska, Ilona Michałowska, Elżbieta Florczak, Katarzyna Kożuch, Katarzyna Hanus, Anna Aniszczuk-Hybiak, Helena Witowicz, Adam Witkowski, Jacek Kądziela, Marek Kabat, Krzysztof Madej, Sławomir Nazarewski, Andrzej Tykarski, Łukasz Stryczyński, Małgorzata Szczerbo-Trojanowska, Łukasz Światłowski, Przemysław Kosiński, Krystyna Widecka, Andrzej Januszewicz, Piotr Hoffman
OBJECTIVE: To provide a comprehensive assessment of left ventricle (LV) structure, and function and to detect alterations in cardiac properties in relationship to presence, subtypes and extent of fibromuscular dysplasia (FMD). METHODS: We studied 144 patients with FMD. The control group consisted of 50 matched individuals. Office and ambulatory blood pressure levels were evaluated. Echocardiography was employed to assess: left ventricular mass index (LVMI), systolic function including speckle tracking echocardiography and diastolic function assessed by mitral flow and tissue Doppler imaging...
March 9, 2018: Journal of Hypertension
Devin B Phillips, Craig D Steinback, Sophie É Collins, Desi P Fuhr, Tracey L Bryan, Eric Y L Wong, Vincent Tedjasaputra, Mohit Bhutani, Michael K Stickland
COPD patients have increased central arterial stiffness and muscle sympathetic nervous activity (MSNA), both of which contribute to cardiovascular (CV) dysfunction and increased CV risk. Previous work suggests that COPD patients have elevated carotid chemoreceptor (CC) activity/sensitivity, which may contribute to the elevated MSNA and arterial stiffness. Accordingly, the effect of CC inhibition on central arterial stiffness, MSNA and CV function at rest in COPD patients was examined in a randomized placebo-controlled study...
March 12, 2018: Journal of Physiology
Sehnaz Tezcan, Ebru Ayvazoglu Soy, Nihal Uslu, Mehmet Haberal
Urinary tract infection is the most common complication after kidney transplant and often is associated with graft loss and mortality. Ultrasonography is the most widely applied imaging modality for diagnosis of complications after kidney transplant. Here, we report a case of a 52-year-old male patient who underwent renal transplant 1 month earlier and who presented with fever, leukocytosis, and leukocyturia. Klebsiella pneumoniae was found in the urine and blood cultures. Ultrasonography revealed multiple, ill-defined margined, hypoechoic areas and cysts within the cortex...
March 2018: Experimental and Clinical Transplantation
Cesare Battaglia, Nicola Persico, Isabella Zanetti, Francesca Guasina, Mara Mattioli, Paolo Casadio, Elena Morotti
During pregnancy, women go through a series of physical and emotional changes that may have an impact on their sexuality. The aim of the study was to examine modifications in sexual function during pregnancy by means of translabial ultrasonography and administration of questionnaires on sexual activity. Eighteen healthy and adult (25-35 years) pregnant women without sexual dysfunction and with a stable heterosexual relationship were examined at 10-12, 18-20, and 30-32 weeks of gestation. Patients underwent ultrasonographic translabial clitoral volume and labia minora thickness measurements and color Doppler assessment of the dorsal clitoral and posterior labial arteries...
March 9, 2018: Archives of Sexual Behavior
Xiaohang Li, Jialin Zhang, Yiman Meng, Lei Yang, Fengshan Wang, Baifeng Li, Xitong Zhang
BACKGROUND: Renal transplant is the preferred treatment option for these patients with end-stage renal disease. Transplant renal artery stenosis (TRAS) is one of the most common and serious vascular complications after renal transplantation, and most of the TRAS occurred in the anastomosis. The complication must be diagnosed and treated timely, otherwise the function of transplanted kidney may be losed. CASE PRESENTATION: A 46-year-old male with end-stage renal disease of unknown cause received a cadaveric renal transplant one year ago...
March 9, 2018: BMC Nephrology
Sunghwa Hong, Seungjo Park, Dahae Lee, Ahyoung Cha, Dongeun Kim, Jihye Choi
OBJECTIVE: This study was performed to evaluate ocular structures using contrast-enhanced ultrasonography (CEUS) in dogs to assess the feasibility of CEUS for investigating the blood perfusion of canine eyes. ANIMAL STUDIED: Eight purpose-bred beagles were used. PROCEDURES: Blood perfusion and vascularity of the right eye were evaluated using color Doppler, power Doppler, and CEUS with Sonazoid® . Vascular changes were quantitatively evaluated by measuring peak intensity, time to initial upslope, and time to peak from the ciliary body, iris, choroid, retina, and the retrobulbar region by CEUS...
March 9, 2018: Veterinary Ophthalmology
Rafi Sheikh, Khashayar Memarzadeh, Christian Torbrand, Jonas Blohmé, Sandra Lindstedt, Malin Malmsjö
Purpose: The eyelid is commonly dissected and divided in the process of, for example, blepharotomy, entropion repair, or when preparing a full-thickness eyelid flap to reconstruct a tumor defect. No study has yet been conducted to examine how perfusion in an eyelid is affected by dissection, using modern imaging techniques. Methods: The eyelid was divided with a 10-mm vertical incision, 5 mm from the medial canthus, and the incision was extended horizontally by 30 mm to provide a full-thickness eyelid. Blood perfusion was measured along the length of the free dissected eyelid using both laser Doppler velocimetry and laser speckle contrast imaging...
2018: Eplasty
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