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Vascular ultrasound

C Roehrig, M Govier, J Robinson, A Aneman
BACKGROUND: It remains unclear whether measuring carotid arterial flow by the time velocity integral using vascular Doppler ultrasound can be used to monitor cardiac output and volume responsiveness. METHODS: The carotid Doppler flow (time velocity integral and peak flow velocity variation) was assessed in triplicate by an intensivist with formal vascular ultrasound training. Thirty-three patients admitted following coronary by-pass surgery were studied before and after a passive leg-raising manoeuvre to investigate volume responsiveness (more than 10% increase in cardiac output) along with indices of arterial load measuring cardiac output by thermodilution...
October 21, 2016: Acta Anaesthesiologica Scandinavica
Rafael Vilhena de Carvalho Fürst, Afonso César Polimanti, Sidnei José Galego, Maria Claudia Bicudo, Erik Montagna, João Antônio Corrêa
OBJECTIVE: To present a simple and affordable model able to properly simulate an ultrasound-guided venous access. DESIGN: The simulation was made using a latex balloon tube filled with water and dye solution implanted in a thawed chicken breast with bones. RESULTS: The presented model allows the simulation of all implant stages of a central catheter. The obtained echogenicity is similar to that observed in human tissue, and the ultrasound identification of the tissues, balloon, needle, wire guide and catheter is feasible and reproducible...
October 20, 2016: World Journal of Surgery
Alexander Dima, Vasilis Ntziachristos
We interrogated the application and imaging features obtained by non-invasive and handheld optoacoustic imaging of the thyroid in-vivo. Optoacoustics can offer complementary contrast to ultrasound, by resolving optical absorption-based and offering speckle-free imaging. In particular we inquired whether vascular structures could be better resolved using optoacoustics. For this reason we developed a compact handheld version of real-time multispectral optoacoustic tomography (MSOT) using a detector adapted to the dimensions and overall geometry of the human neck...
June 2016: Photoacoustics
Christina M Cromwell, Kristin R Aichele, Joyann E Oakman, Michael P Neal, Jessica M Lenzo, Avery N Perez, Naomi L Bye, Erica L Santaniello, Jessica A Hill, Rachel C Evans, Karla A Thiele, Lauren N Chavis, Allyson K Getty, Tia R Wisdo, Deborah L Feairheller
Previous studies have investigated carotid artery intima-media thickness (IMT) and blood pressure and found a direct correlation between the two. It is known that adult females have better cardiovascular health than males until a certain stage of life, yet limited research has examined gender differences in vascular function. Thus, the purpose of this study was to investigate vascular structure and function, blood pressure, and blood glucose/cholesterol levels in relation to gender differences in young healthy adults...
2016: International Journal of Exercise Science
Joshua A Beckman, Allison B Goldfine, Jane A Leopold, Mark A Creager
Oxidative stress is a key driver of vascular dysfunction in diabetes mellitus. Ebselen is a glutathione-peroxidase mimetic. A single-site, randomized, double-masked, placebo-controlled crossover trial in 26 subjects with either type 1 or type 2 diabetes to evaluate effects of high-dose ebselen (150 mg orally twice daily) administration on oxidative stress and endothelium-dependent vasodilation. Treatment periods were in random order of 4 weeks duration, with a 4 week washout between. Measures of oxidative stress included nitrotyrosine, plasma 8-isoprostanes, and the ratio of reduced-to-oxidized glutathione...
October 7, 2016: American Journal of Physiology. Heart and Circulatory Physiology
Craig C Weinkauf, Scott S Berman, Kay Goshima, Luis R Leon, Edmund R Marinelli, Rebecca Millius, Evan C Unger
No abstract text is available yet for this article.
August 2016: Journal of Vascular Surgery
Sameer Sethi, Souvik Maitra, Vikas Saini, Tanvir Samra, S K Malhotra
BACKGROUND: The current available literature is not unanimous in reporting the utility of short-axis and long-axis techniques for radial artery cannulation in both adults and children. This study was designed to compare short-axis out-of-plane (SA-OOP) and long-axis in-plane (LA-IP) techniques in ultrasound-guided radial artery cannulation in adults. METHODS: In this prospective randomized controlled trial, 150 adult patients of American Society of Anesthesiologists physical status I-III aged between 18 and 70 years were included...
October 19, 2016: Journal of Anesthesia
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
Mais M Aljunaidy, Jude S Morton, Christy-Lynn Cooke, Sandra T Davidge
Intrauterine growth restriction (IUGR) is a common pregnancy complication and is a leading cause of fetal morbidity and mortality. Placental hypoxia contributes to adverse fetal consequences, including IUGR. Exposing pregnant rats to hypoxia can lead to IUGR; however, assessment of maternal vascular function in a rat model of hypoxia, and the mechanisms that may contribute to adverse pregnancy outcomes, has not been extensively studied. We hypothesized that exposing pregnant rats to hypoxia will affect maternal systemic vascular function and increase the uterine artery resistance index (RI), which will be associated with IUGR...
October 19, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
Robert N Goldstone, Michael C McCormack, Rachel L Goldstein, Srivalleesha Mallidi, Mark A Randolph, Michael T Watkins, Robert W Redmond, William G Austen
OBJECTIVE: We hypothesized that decreasing vein compliance would protect the vein against stretch injury and reduce intimal hyperplasia (IH). BACKGROUND: Although arteriovenous fistulas (AVFs) are the criterion standard for vascular access, their effectiveness is limited by poor patency with 40% to 60% failing due to IH. Venous stretch injury from exposure to arterial pressure induces IH. Photochemical tissue passivation (PTP) crosslinks adventitial collagen, decreasing vein compliance to resemble that of an artery...
October 17, 2016: Annals of Surgery
Hao-Lin Shen, Shu-Ping Yang, Kang-Jian Wang, Bei-Lei Huang, Wen-Bao Huang, Jin-Zhi Wu, Guo-Rong Lv
OBJECTIVE: Improvement in regional blood flow has been shown to ameliorate diabetic gastroparesis. We compared the gastric blood supply in diabetic patients with gastroparesis, with that in healthy subjects, by using contrast-enhanced ultrasound (CEUS). METHODS: Thirty healthy subjects and forty patients with diabetic gastroparesis were enrolled. The CEUS parameters of greater curvatures of the antrum (GCOA) and lesser curvatures of antrum (LCOA), including peak intensity (PI) and the area under the curve (AUC), were compared between the two groups...
October 19, 2016: British Journal of Radiology
Aashish Kumar Sharma, R P Agrawal, J K Sharma, Ritvik Agrawal, Surendra Kumar, Kunal Thackar, Kailash Chandra Saini
OBJECTIVE: Vitamin D deficiency may be responsible for endothelial dysfunction which in turn affects the onset and progression of vascular disease including coronary artery disease and its risk factor, directly or indirectly through various mechanisms. This study was undertaken to find out association between vitamin D and endothelial dilatation of brachial artery, which may help to suggest possible underlying mechanisms and may be of clinical importance in planning preventive and therapeutic strategies...
July 2016: Journal of the Association of Physicians of India
Shu-Ya Tsai, Chih-Yi Hsu, Yi-Hong Chou, Yi-Chen Lai, Yung-Hui Lin, Hsin-Kai Wang, Hong-Jen Chiou, Jane Wang, Chui-Mei Tiu
Solitary fibrous tumor (SFT) is an uncommon neoplasm of mesenchymal origin, which can be benign or malignant. Most SFTs develop from the pleura, but they can also be found in other sites. There are only few reports of SFT occurring in the breast. We herein report such a rare case. Sonography demonstrated an ovoid lesion mimicking a fibroadenoma, whereas color Doppler imaging showed marked internal vascularity. A brief literature review on imaging features of SFTs is added. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound, 2016...
October 18, 2016: Journal of Clinical Ultrasound: JCU
Alberto Mansur Ghetti, Luiz Gustavo Bruno Siqueira, Eduardo Kenji Nunes Arashiro, Miller Pereira Palhao, Felipe Zandonadi Brandao, Joao Henrique Moreira Viana
BACKGROUND: Removal of the follicular content by ultrasound-guided transvaginal follicle aspiration (TVFA) may fail to induce immediate atresia and loss of function, resulting in the occurrence of residual follicles (RF). The aims of this study were to characterize the blood flow in RF and to determine the effects of the treatment with estradiol benzoate on RF fate. Lactating, cyclic Holstein-Gir crossbred cows were used. In Experiment 1, follicular wave emergence (D0) was synchronized in cows (n = 10) and follicular growth was then monitored by transrectal ultrasonography from D0 to D8, followed by TVFA of the largest follicle present on the ovaries 24 h later...
2016: Journal of Animal Science and Biotechnology
Takayuki Iwamoto, Yasuharu Imai, Sachiyo Kogita, Takumi Igura, Yoshiyuki Sawai, Kazuto Fukuda, Yoshitaka Yamaguchi, Yasushi Matsumoto, Masanori Nakahara, Osakuni Morimoto, Yasushi Seki, Hiroshi Ohashi, Norihiko Fujita, Masatoshi Kudo, Tetsuo Takehara
OBJECTIVE: We compared the efficacy of contrast-enhanced ultrasound sonography (CEUS) with sonazoid and gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced MRI for the assessment of macroscopic classification of nodular hepatocellular carcinoma (HCC). METHODS: Seventy-seven consecutive patients with 79 surgically resected HCCs who underwent both preoperative CEUS and Gd-EOB-DTPA-enhanced MRI were enrolled in this retrospective study...
2016: Digestive Diseases
Benjamin A Fisher, Philippe Donatien, Andrew Filer, C Peter Winlove, Iain B McInnes, Christopher D Buckley, Peter C Taylor
OBJECTIVES: An important feature of rheumatoid arthritis (RA) is hypoxia-driven synovial angiogenesis, but the relationship between change in vascularity, as measured by power Doppler ultrasound (PDUS), and oxygen tensions is unaddressed. METHODS: Metacarpophalangeal (MCP) joint PDUS was assessed in 23 patients with RA, alongside arthroscopic synovitis and oxygen tension measurements, at baseline and 4 weeks after anti-tumour necrosis factor (TNF) inhibitors. RESULTS: Anti-TNF reduced PDUS scores, which were negatively correlated with rise in oxygen tensions...
September 8, 2016: Clinical and Experimental Rheumatology
Jianzhong Xu, Duojiao Wu, Yan Yang, Kaida Ji, Pingjin Gao
The present study investigated the contribution of bone marrow-derived mesenchymal stem cells (BM‑MSCs) to neointimal formation, and whether endothelial‑like cells (ELCs) differentiated from BM‑MSCs could attenuate intimal hyperplasia following vascular injury. BM‑MSCs were isolated from rat femurs and tibias and expanded ex vivo. Differentiation into ELCs was induced by cultivation in the presence of 50 ng/ml vascular endothelial growth factor (VEGF). MSCs and ELCs were labeled with BrdU and injected via the femoral vein on the day of a balloon‑induced carotid artery injury...
October 5, 2016: Molecular Medicine Reports
Christoph F Dietrich, Rudolf Horn, Susanne Morf, Liliana Chiorean, Yi Dong, Xin-Wu Cui, Nathan S S Atkinson, Christian Jenssen
Central venous access has traditionally been performed on the basis of designated anatomical landmarks. However, due to patients' individual anatomy and vessel pathology and depending on individual operators' skill, this landmark approach is associated with a significant failure rate and complication risk. There is substantial evidence demonstrating significant improvement in effectiveness and safety of vascular access by realtime ultrasound (US)-guidance, as compared to the anatomical landmark-guided approach...
September 2016: Journal of Thoracic Disease
Khaled Elbahrawy, Alaa El-Deeb
BACKGROUND: Acute mesenteric ischemia is a life-threatening vascular emergency that requires early diagnosis, immediate anticoagulation, and intervention to restore mesenteric blood flow adequately. AIMS: To investigate the effect of rectus sheath block (RSB) for postoperative analgesia in patients with mesenteric vascular occlusion. SETTINGS AND DESIGN: Forty patients with mesenteric vascular occlusion, American Society of Anesthesiologists physical status I or II or III, scheduled for laparotomy were enrolled in this study...
September 2016: Anesthesia, Essays and Researches
Masaaki Murakami, Genichi Sakaguchi, Noriko Mori
OBJECTIVE: In patients with a high risk of fistula immaturity, we created arteriovenous fistulas (AVFs) combined with brachial artery superficialization. With this procedure, the superficialized arteries are used as drawing routes and the AVFs as returning routes. This is a technical report about AVFs combined with brachial artery superficialization. METHODS: Twenty-four consecutive patients with a high risk of fistula immaturity who underwent AVFs with brachial artery superficialization were included in this single-center retrospective study...
October 12, 2016: Journal of Vascular Surgery
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