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Vascular ultrasound

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https://www.readbyqxmd.com/read/28635180/renal-vascularization-indexes-and-fetal-hemodynamics-in-fetuses-with-growth-restriction
#1
Giovana Farina Doro, Janaína Campos Senra, Agatha Sacramento Rodrigues, Seizo Miyadahira, Renata Lopes Ribeiro, Rossana Pulcinelli Vieira, 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 10(th) 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/28634807/differential-diagnosis-between-benign-and-malignant-soft-tissue-tumors-utilizing-ultrasound-parameters
#2
Takeshi Morii, Tomonori Kishino, Naoko Shimamori, Mitsue Motohashi, Hiroaki Ohnishi, Keita Honya, Takayuki Aoyagi, Takashi Tajima, Shoichi Ichimura
PURPOSE: Preoperative discrimination between benign and malignant soft tissue tumors is critical for the prevention of excess application of magnetic resonance imaging and biopsy as well as unplanned resection. Although ultrasound, including power Doppler imaging, is an easy, noninvasive, and cost-effective modality for screening soft tissue tumors, few studies have investigated reliable discrimination between benign and malignant soft tissue tumors. METHODS: To establish a modality for discrimination between benign and malignant soft tissue tumors using ultrasound, we extracted the significant risk factors for malignancy based on ultrasound information from 40 malignant and 56 benign pathologically diagnosed soft tissue tumors and established a scoring system based on these risk factors...
June 20, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28634641/a-novel-technique-for-ultrasound-guided-central-venous-catheterization-under-short-axis-out-of-plane-approach-stepwise-flashing-with-triangulation
#3
Toshinori Horiuchi, Chie Okuda, Naoko Kurita, Ayako Yamaguchi, Kazuhiko Kitagawa, Masafumi Takeda, Keiichi Sha, Toshihiro Nagahata
In ultrasound-guided central venous catheterization, there is no standard technique either for the needle tip visualization or for the adequate needle angle and entry to the skin with short-axis view under out-of-plane technique. In the present study, we propose a novel technique named "stepwise flashing with triangulation", and the efficacy of this technique is assessed. Before and after a didactic session in which the technique was explained, 12 novice residents were asked to position the needle tip on or into the imitation vessels and to avoid deeper penetration by using an agar tissue phantom with ultrasound guidance...
June 20, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28633808/impact-of-mr-guided-boiling-histotripsy-in-distinct-murine-tumor-models
#4
Martijn Hoogenboom, Dylan C Eikelenboom, Renske J E van den Bijgaart, Arend Heerschap, Pieter Wesseling, Martijn H den Brok, Jurgen J Fütterer, Gosse J Adema
Interest in mechanical high intensity focused ultrasound (HIFU) ablation is rapidly growing. Boiling histotripsy (BH) is applied for mechanical fragmentation of soft tissue into submicron fragments with limited temperature increase using the shock wave and cavitation effects of HIFU. Research on BH has been largely limited to ex vivo experiments. As a consequence, the in vivo pathology after BH treatment and the relation to preexistent tissue characteristics are not well understood. This study reports on in vivo MR guided BH treatment, either with 100 or 200 pulses per focal spot, in three different subcutaneous mouse tumor models: a soft-tissue melanoma (B16OVA), a compact growing thymoma (EL4), and a highly vascularized neuroblastoma (9464D)...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28632498/can-early-ultrasonography-explain-the-lower-miscarriage-rates-in-twin-as-compared-to-singleton-pregnancies-following-assisted-reproduction
#5
Ana Póvoa, Alexandra Matias, Pedro Xavier, Isaac Blickstein
OBJECTIVE: To compare first trimester 2D conventional and 3D power Doppler angiography measures in twins and singletons following assisted reproduction. METHODS: We prospectively evaluated 50 singleton and 47 twin pregnancies that eventually ended in live births. Patients were recruited from a single assisted reproductive technology (ART) center with standard treatment protocols. Obstetric ultrasound was performed at 8-9 weeks +6 days. Intervillous flow, uteroplacental circulation and uterine artery pulsatility (PI) and resistance index (RI) using two-dimensional (2D) ultrasound examination were evaluated...
June 20, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28630235/ultrasound-markers-of-carotid-atherosclerosis-and-cognition-the-northern-manhattan-study
#6
Hannah Gardener, Michelle R Caunca, Chuanhui Dong, Ying Kuen Cheung, Mitchell S V Elkind, Ralph L Sacco, Tatjana Rundek, Clinton B Wright
BACKGROUND AND PURPOSE: Ultrasound markers of carotid atherosclerosis may be related to cognitive status. We hypothesized that individuals with greater carotid intima-media thickness (cIMT) and carotid plaque burden would exhibit worse cognition. METHODS: One thousand one hundred sixty-six stroke-free participants from the NOMAS (Northern Manhattan Study) underwent carotid ultrasound and neuropsychological examination. Among them, 826 underwent a second neuropsychological examination an average of 5 years later...
June 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28630019/tunica-vaginalis-pedicle-flap-for-repair-of-ruptured-testis-a-single-center-experience-with-four-patients
#7
R N Damle, J F Lalikos, J T Aidlen, P Ellsworth
Management of testicular rupture with a large tunical defect may not be feasible without excision of viable tissue. This study describes the use of a vascularized tunica vaginalis flap, without debridement of viable tissue, in four adolescents. Postoperative ultrasound showed good blood flow and 80% volume of the contralateral testis in two cases. Postoperative exam revealed normal exam and ultrasonographic appearance in three patients, the fourth was demonstrated to be small and undescended during evaluation of contralateral testicular torsion...
May 24, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28629806/prevalence-of-bleeding-complications-following-ultrasound-guided-botulinum-toxin-injections-in-patiens-on-anticoagulation-or-antiplatelet-therapy
#8
Jeffrey Lavallee, Regan Royer, Geoffrey Smith
BACKGROUND: Patients on anticoagulation or antiplatelet therapy may be at higher risk of bleeding complications following intramuscular chemodenervation injections. Musculoskeletal ultrasound may be able to reduce the risk of bleeding complications by providing real time visualization of vascular structures and post-injection monitoring. Limited data exist addressing risk of bleeding complications following ultrasound-guided botulinum neurotoxin intramuscular chemodenervation procedures in the setting of anticoagulation or antiplatelet therapy...
June 16, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28629689/advanced-power-doppler-technique-increases-synovial-vascularity-detection-in-patients-with-rheumatoid-arthritis
#9
Davide Orlandi, Salvatore Gitto, Silvia Perugin Bernardi, Angelo Corazza, Luca De Flaviis, Enzo Silvestri, Marco Amedeo Cimmino, Luca Maria Sconfienza
We compared the diagnostic performance of an advanced power Doppler technique (superb microvascular imaging [SMI]) with that of power Doppler Imaging (PDI) and B-mode ultrasound (US) in patients with early rheumatoid arthritis (RA) and RA under treatment with rituximab. Thirty patients (21 women aged 45 ± 11 y) affected by RA with remission to moderate disease activity were examined. Both hand joints were evaluated using US, PDI and SMI. Two radiologists reviewed all video clips and evaluated synovial vascularity intensity using a semi-quantitative scoring system...
June 16, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28629621/differential-effect-of-obesity-on-prevalence-of-cardiac-and-carotid-target-organ-damage-in-hypertension-the-campania-salute-network
#10
Costantino Mancusi, Eva Gerdts, Maria Angela Losi, Andrea D'Amato, Maria Virginia Manzi, Grazia Canciello, Valentina Trimarco, Nicola De Luca, Giovanni de Simone, Raffaele Izzo
BACKGROUND: Whether increasing body mass index (BMI) is independently associated with parallel increased prevalence of hypertensive vascular and cardiac target organ damage (TOD) needs further clarification. METHODS: We analyzed 8815 hypertensive patients without prevalent cardiovascular disease, participating in the Campania Salute Network, grouped into BMI classes (normal 20-24.9kg/m(2), overweight 25-29.9kg/m(2) and obese ≥30kg/m(2)). Vascular and cardiac TOD was defined as ultrasound plaque (intima-media thickness>1...
June 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28629253/insights-into-the-management-of-papillary-microcarcinoma-of-the-thyroid
#11
Akira Miyauchi, Yasuhiro Ito, Hitomi Oda
BACKGROUND: Rapid increases in the incidence of thyroid carcinoma with stable mortality rates from thyroid carcinoma have been reported from many countries, and these increases are thought to be due mostly to the increased detection of small papillary thyroid carcinomas (PTCs), including papillary microcarcinomas (PMCs, i.e., PTCs ≤10 mm). Some researchers suggested small PTCs have been overdiagnosed and overtreated. In Japan, the active surveillance of patients with low-risk PMCs was initiated by Kuma Hospital (1993) and Tokyo's Cancer Institute Hospital (1995) based on the extremely higher incidences of both latent thyroid carcinomas in autopsy studies and small PTCs detected in mass screening studies using ultrasound examinations compared to the prevalence of clinical thyroid carcinoma...
June 19, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28628470/vascularity-of-nail-bed-by-ultrasound-to-discriminate-psoriasis-psoriatic-arthritis-and-healthy-controls
#12
Sibel Zehra Aydin, Concepción Castillo-Gallego, Zoe R Ash, Helena Marzo-Ortega, Richard Wakefield, Dennis McGonagle
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June 16, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28627865/the-value-of-color-doppler-ultrasound-in-the-diagnosis-of-lower-extremity-vascular-disease-in-type-2-diabetes-and-an-analysis-of-related-factors
#13
Le Jiang, Yuehua Zhao
BACKGROUND: The aim of this paper is to explore the application and clinical significance of color Doppler ultrasound (CDU) in diagnosing lower extremity vascular disease in type 2 diabetes mellitus (T2DM) patients. METHODS: The lower extremity arteries of 81 patients with T2DM and 50 control patients were examined by CDU for blood vessel diameter, intima-media thickness, plaque on the vessel wall, lumen stenosis and filling defect in blood flow. The occurrence of diabetes mellitus was investigated in additional T2DM patients of various ages...
September 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/28625610/current-progress-in-antivascular-tumor-therapy
#14
REVIEW
Yi-Ju Ho, Tzu-Chia Wang, Ching-Hsiang Fan, Chih-Kuang Yeh
The tumor vasculature transports oxygen, nutrients and drugs for crucial roles in tumor therapy. Antivascular therapy directly targets existing tumor vessels to reduce blood perfusion and then inhibit tumor growth. Vascular disrupting agents and ultrasound-stimulated microbubble destruction use chemical toxicity and physical effect, respectively, to damage vascular endothelial cells for antivascular therapy. Moreover, antivascular therapy can break vessel wall barriers and change the tumor microenvironment to compensate for the limitations of conventional chemotherapy or radiotherapy...
June 15, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28625391/twelve-year-experience-of-radical-but-conservative-liver-surgery-for-colorectal-metastases-impact-on-surgical-practice-and-oncologic-efficacy
#15
Guido Torzilli, Luca Viganò, Andrea Gatti, Guido Costa, Matteo Cimino, Fabio Procopio, Matteo Donadon, Daniele Del Fabbro
BACKGROUND: Liver surgery for colorectal metastases (CLM) is moving toward parenchyma-sparing approaches. The authors reported the technical feasibility of parenchyma-sparing hepatectomy for deeply located tumors, but its impact on daily practice and long-term outcomes remain unclear. METHODS: The patients undergoing liver resection (LR) for CLM with vascular contact (first-/second-order pedicle or hepatic vein (HV) trunk) were considered. Those undergoing major hepatectomy were excluded...
June 16, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28625266/-risk-factors-of-deep-venous-thrombosis-associated-with-peripherally-inserted-central-venous-catheter-in-upper-extremity-in-icu
#16
Ning Zhao, Jiale Zhang, Ting Jiang, Xia Chen, Jianning Wang, Chengzhi Ding, Fen Liu, Kejian Qian, Rong Jiang
OBJECTIVE: To analyze the incidence and its risk factors of peripherally inserted central venous catheter related upper extremity deep venous thrombosis (PICC-UEDVT) in intensive care unit (ICU). METHODS: Clinical data of the patients received PICCs in ICU of the First Affiliated Hospital of Nanchang University from August 2013 to August 2016 were retrospectively analysed. The inclusion criteria in the study included: the age > 18 years old, catheter indwelling time > 1 week and the complete relevant information...
February 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28625128/the-wnt-%C3%AE-catenin-signalling-pathway-inhibitor-sclerostin-is-a-biomarker-for-early-atherosclerosis-in-obesity
#17
Djordje S Popovic, Milena Mitrovic, Dragana Tomic-Naglic, Tijana Icin, Ivana Bajkin, Bojan Vukovic, Damir Benc, Zeljko Zivanovic, Branka Kovacev-Zavisic, Edita Stokic
BACKGROUND: Sclerostin is an inhibitor of the wingless-type mouse mammary tumor virus integration site family/β-catenin signalling pathway (WβcSP), which plays an important role in bone metabolism and in vascular biology. It could act protective regarding atherosclerosis development through its effect on WβcSP in vascular cells. Nevertheless, results of studies analyzing association between circulating sclerostin level (CSL) and atherosclerotic diseases (AD) are showing conflicting results...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28624852/vasoconstrictor-responsiveness-in-contracting-human-muscle-influence-of-contraction-frequency-contractile-work-and-metabolic-rate
#18
Nicholas T Kruse, William E Hughes, Kenichi Ueda, Darren P Casey
PURPOSE: The aim of this study was to examine whether independent effects exist between contractile work and metabolic demand (VO2m) on vasoconstrictor responsiveness (i.e., functional sympatholysis) under different contraction durations matched for total contractile work in exercising human skeletal muscle. METHODS: Ten young men performed rhythmic forearm contractions at 10 and 15% of maximum voluntary contraction (MVC) which consisted of muscle contractions using the same duty cycle but altering the duration of the contraction-relaxation cycles of exercise and included: 1) fast frequency contractions at 10% MVC (FFC10%) using a contraction relaxation cycle at 1:2 s; 2) slow frequency contractions at 10% MVC (SFC10%) at 2:4 s; and 3) SFC at 15% MVC (SFC15%) at 2:4 s...
June 17, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28624705/controlled-release-of-basic-fibroblast-growth-factor-for-angiogenesis-using-acoustically-responsive-scaffolds
#19
Alexander Moncion, Melissa Lin, Eric G O'Neill, Renny T Franceschi, Oliver D Kripfgans, Andrew J Putnam, Mario L Fabiilli
The clinical translation of pro-angiogenic growth factors for treatment of vascular disease has remained a challenge due to safety and efficacy concerns. Various approaches have been used to design spatiotemporally-controlled delivery systems for growth factors in order to recapitulate aspects of endogenous signaling and thus assist in translation. We have developed acoustically-responsive scaffolds (ARSs), which are fibrin scaffolds doped with a payload-containing, sonosensitive emulsion. Payload release can be controlled non-invasively and in an on-demand manner using focused, megahertz-range ultrasound (US)...
June 9, 2017: Biomaterials
https://www.readbyqxmd.com/read/28623995/rationale-design-and-methodology-of-the-observational-insights-svt-study-on-the-current-state-of-care-and-outcomes-of-patients-with-superficial-vein-thrombosis
#20
Rupert Bauersachs, Horst Eberhard Gerlach, Andreas Heinken, Ulrich Hoffmann, Florian Langer, Thomas Noppeney, David Pittrow, Jens Klotsche, Eberhard Rabe
OBJECTIVE: Superficial vein thrombosis (SVT) is a common disease in clinical practice. In terms of pathophysiology and outcomes, the condition is related to venous thromboembolism, bearing a potential for severe thromboembolic complications if it is not treated adequately. A wide range of treatment approaches (including oral and injectable anticoagulants, pain medication, nondrug therapy including compression therapy, and no treatment at all) are applied in clinical practice, but there is sparse information about selection of patients for therapies, current treatment pathways, and drug use as well as outcomes...
July 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
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