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https://www.readbyqxmd.com/read/29683200/posterior-wall-punctures-between-long-and-short-axis-techniques-in-a-phantom-intravenous-model
#1
Darien Davda, David Schrift
OBJECTIVES: To determine whether a long-axis, in-plane approach to ultrasound-guided vascular access produces fewer posterior wall punctures than a short-axis, out-of-plane approach when attempted by novices without prior ultrasound-guided procedural experience. METHODS: Participants were randomized to perform either technique on a ballistic gel-based phantom in a randomized controlled trial. They were then crossed over to repeat the experiment using the alternative approach...
April 23, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29680612/water-treatment-mn-tio-2-synthesized-by-ultrasound-with-increased-aromatics-adsorption
#2
M Stucchi, A Elfiad, M Rigamonti, H Khan, D C Boffito
Pharma-products are mostly single or multiple cyclic compounds. They pollute surface water and are persistent in the aquatic ecosystem. When irradiated by UV light, TiO2 catalysts cleave or degrade organic contaminants in water. Removal of organics by photocatalysis results from a synergistic effect of adsorption and photocatalysis. Synthesis of catalysts by ultrasound (US) produces high surface area and porous solids. Here, we synthesized Mn-doped TiO2 with a US-assisted sol-gel method. Compared to the classical synthesis, US increased the BET surface area from 83 m2  g-1 to 90 m2  g-1 in the Mn-TiO2 sample and from 9...
June 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29643620/opioid-free-anesthesia-for-breast-cancer-surgery-an-observational-study
#3
Swagata Tripathy, Satyajit Rath, Suresh Agrawal, P Bhaskar Rao, A Panda, T S Mishra, Sukdev Nayak
Background and Aims: Opioids are associated with postoperative nausea, vomiting, drowsiness, and increased analgesic requirement. A nonopioid anesthesia technique may reduce morbidity, enable day care surgery, and possibly decrease tumor recurrence. We compared opioid-free, nerve block-based anesthesia with opioid-based general anesthesia for breast cancer surgery in a prospective cohort study. Material and Methods: Twenty four adult American Society of Anesthesiologists grade I-III patients posted for modified radical mastectomy (MRM) with axillary dissection were induced with propofol and maintained on isoflurane (0...
January 2018: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29620705/building-ultrasound-phantoms-with-modified-polyvinyl-chloride-a-comparison-of-needle-insertion-forces-and-sonographic-appearance-with-commercial-and-traditional-simulation-materials
#4
David Frederick Pepley, Cheyenne Cassel Sonntag, Rohan Sunil Prabhu, Mary Alice Yovanoff, David C Han, Scarlett Rae Miller, Jason Zachary Moore
INTRODUCTION: Training using ultrasound phantoms allows for safe introduction to clinical skills and is associated with improved in-hospital performance. Many materials have been used to simulate human tissue in phantoms including commercial manikins, agar, gelatin, and Ballistics Gel; however, phantom tissues could be improved to provide higher-fidelity ultrasound images or tactile sensation. This article describes a novel phantom tissue mixture of a modified polyvinyl chloride (PVC) polymer, mineral oil, and chalk powder and evaluates needle cutting and ultrasonic properties of the modified PVC polymer mixture compared with a variety of phantom tissues...
April 3, 2018: Simulation in Healthcare: Journal of the Society for Simulation in Healthcare
https://www.readbyqxmd.com/read/29611172/prevention-of-in-stent-restenosis-with-endothelial-progenitor-cell-epc-capture-stent-placement-combined-with-regional-epc-transplantation-an-atherosclerotic-rabbit-model
#5
You-Hua Huang, Qiang Xu, Tao Shen, Jian-Ke Li, Jing-Yu Sheng, Hong-Jian Shi
BACKGROUND: Even with drug-eluting stents, the risk of in-stent restenosis (ISR) remains high. The goal of this study was to investigate the use of an endothelial progenitor cell (EPC) capture stent plus regional EPC transplantation to reduce the ISR rate. METHODS: Endothelial progenitor cell capture stents were fabricated using fibrin gel and anti-CD34 plus anti-VEGFR-2 dual antibodies. Twenty male New Zealand white rabbits established as an atherosclerotic model were randomly divided into two groups: group 1 (n = 10), in which EPC capture stents were deployed into the right iliac artery; and group 2 (n = 10), in which sirolimus-eluting stents were placed...
April 3, 2018: Cardiology Journal
https://www.readbyqxmd.com/read/29597836/validation-of-a-novel-cost-effective-easy-to-produce-and-durable-in-vitro-model-for-kidney-puncture-and-pnl-simulation
#6
Jan Thorsten Klein, Jens Rassweiler, Marie-Claire Charlotte Rassweiler-Seyfried
INTRODUCTION: Nephrolithiasis is one of the most common diseases in urology. According to the EAU Guidelines, a percutaneous nephrolitholapaxy (PNL) is recommended when treating a kidney stone >2 cm. Nowadays PNL is performed even for smaller stones (<1 cm) using miniaturized instruments. The most challenging part of any PNL is the puncture of the planned site. PNL-novice surgeons need to practice this step in a safe environment with an ideal training model. We developed and evaluated a new, easy to produce, in-vitro model for the training of the freehand puncture of the kidney...
March 29, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29571304/ultrasound-assisted-emulsification-microextraction-in-an-online-system-for-determination-of-cadmium-in-water-and-tea-samples
#7
Leane Santos Nunes, Valfredo Azevedo Lemos
In this work, a method using ultrasound-assisted emulsification microextraction (USAEME) without the use of ligands in an online system for preconcentration and determination of cadmium was developed. The method was based on the preconcentration of cadmium by USAEME, employing trichloroethylene as the extraction solvent, and subsequent retention of the rich phase in a mini-column packed with silica gel. The extracted metal was determined by flame atomic absorption spectrometry. The parameters that affect the extraction of cadmium were optimized using the univariate method...
March 23, 2018: Journal of AOAC International
https://www.readbyqxmd.com/read/29570862/medical-and-surgical-management-of-advanced-parkinson-s-disease
#8
REVIEW
Angelo Antonini, Elena Moro, Clecio Godeiro, Heinz Reichmann
Advanced Parkinson's disease is characterized by the presence of motor fluctuations, various degree of dyskinesia, and disability with functional impact on activities of daily living and independence. Therapeutic management aims to extend levodopa benefit while minimizing motor complications and includes, in selected cases, the implementation of drug infusion and surgical techniques. In milder forms of motor complications, these can often be controlled with manipulation of levodopa dose and the introduction of supplemental therapies such as catechol-O-methyl transferase inhibitors, monoamine oxidase B inhibitors, and dopamine agonists including apomorphine...
March 23, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29570806/preparation-of-citrus-pectin-gels-by-power-ultrasound-and-its-application-as-edible-coating-in-strawberries
#9
Ana M Muñoz-Labrador, Rodrigo Moreno, Mar Villamiel, Antonia Montilla
BACKGROUND: Pectin is heteropolysaccharide found in cell walls coming mainly from by-products as well as citrus peels, apple and sugar beet pulp and presenting biological and techno-functional properties. In this work a generalproximal and structural characterisation of industrial citrus pectins was done together with a study of impact of power ultrasound (US) on their rheological properties with the aim of using them as edible coatings for fresh strawberries. RESULTS: The results indicated that pure pectin showed a methylesterification degree greater than 50% and galacturonic acid content > 65%, indicating its consideration as additive E-440, conditions that were not achieved by pectin with sugar addition...
March 23, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29565325/effects-of-ultrasound-assisted-extraction-in-conjugation-with-aid-of-actinidin-on-the-molecular-and-physicochemical-properties-of-bovine-hide-gelatin
#10
Tanbir Ahmad, Amin Ismail, Siti A Ahmad, Khalilah A Khalil, Teik K Leo, Elmutaz A Awad, Jurhamid C Imlan, Awis Q Sazili
Actinidin was used to pretreat the bovine hide and ultrasonic wave (53 kHz and 500 W) was used for the time durations of 2, 4 and 6 h at 60 °C to extract gelatin samples (UA2, UA4 and UA6, respectively). Control (UAC) gelatin was extracted using ultrasound for 6 h at 60 °C without enzyme pretreatment. There was significant ( p < 0.05) increase in gelatin yield as the time duration of ultrasound treatment increased with UA6 giving the highest yield of 19.65%. Gel strength and viscosity of UAC and UA6 extracted gelatin samples were 627...
March 22, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29562717/the-preparation-of-tio%C3%A2-film-by-the-sol-gel-method-and-evaluation-of-its-self-cleaning-property
#11
Yu Liang, Sijia Sun, Tongrong Deng, Hao Ding, Wanting Chen, Ying Chen
TiO₂ sol was produced by the sol-gel method through the hydrolysis and the aging of tetrabutyl titanate and the TiO₂ film was obtained by dipping and uniform lifting of the acid-treated and ultrasound-treated clean glass slides into the TiO₂ sol followed by aging, drying, and calcination. The effect of the hydrolysis control agents to the formed sol was researched and the crystalline state, the morphology, and the photocatalytic properties of the products after calcination were characterized. The structural morphology, the contact angles before and after illumination, and the self-cleaning properties of the TiO₂ film were characterized as well...
March 19, 2018: Materials
https://www.readbyqxmd.com/read/29556365/utmd-promoted-co-delivery-of-gemcitabine-and-mir-21-inhibitor-by-dendrimer-entrapped-gold-nanoparticles-for-pancreatic-cancer-therapy
#12
Lizhou Lin, Yu Fan, Feng Gao, Lifang Jin, Dan Li, Wenjie Sun, Fan Li, Peng Qin, Qiusheng Shi, Xiangyang Shi, Lianfang Du
Conventional chemotherapy of pancreatic cancer (PaCa) suffers the problems of low drug permeability and inherent or acquired drug resistance. Development of new strategies for enhanced therapy still remains a great challenge. Herein, we report a new ultrasound-targeted microbubble destruction (UTMD)-promoted delivery system based on dendrimer-entrapped gold nanoparticles (Au DENPs) for co-delivery of gemcitabine (Gem) and miR-21 inhibitor (miR-21i). Methods: In this study, Gem-Au DENPs/miR-21i was designed and synthesized...
2018: Theranostics
https://www.readbyqxmd.com/read/29546269/do-participants-report-any-undesired-effects-in-ultrasound-speech-therapy
#13
Jonathan L Preston, Gabriela Holliman-Lopez, Megan C Leece
Purpose: Ultrasound visual feedback of the tongue is increasingly used as a component of speech therapy in clinical research and practice. The purpose is to offer a preliminary summary of the nature of participant-reported undesired effects related to ultrasound visual feedback. Method: Sixty-two participants across 3 sites (mean age = 11.9 years) and 38 parents responded to a 2-item verbal questionnaire following 14-16 hr of treatment regarding any aspects of the treatment they did not like...
March 15, 2018: American Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/29542277/clinical-acceptance-testing-and-scanner-comparison-of-ultrasound-shear-wave-elastography
#14
Zaiyang Long, Donald J Tradup, Pengfei Song, Scott F Stekel, Shigao Chen, Katrina N Glazebrook, Nicholas J Hangiandreou
Because of the rapidly growing use of ultrasound shear wave elastography (SWE) in clinical practices, there is a significant need for development of clinical physics performance assessment methods for this technology. This study aims to report two clinical medical physicists' tasks: (a) acceptance testing (AT) of SWE function on ten commercial ultrasound systems for clinical liver application and (b) comparison of SWE measurements of targets across vendors for clinical musculoskeletal application. For AT, ten GE LOGIQ E9 XDclear 2...
March 15, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29541527/incorporation-of-an-ultrasound-and-model-guided-permissible-region-improves-quantitative-source-recovery-in-bioluminescence-tomography
#15
Baptiste Jayet, Stephen P Morgan, Hamid Dehghani
Bioluminescence imaging has shown great potential for studying and monitoring disease progression in small animal pre-clinical imaging. However, absolute bioluminescence source recovery through tomographic multi-wavelength measurements is often hindered through the lack of quantitative accuracy and suffers from both poor localisation and quantitative recovery. In this work a method to incorporate a permissible region strategy through not only a priori location (permissible region) but also based on a model of light propagation and hence light sensitivity is developed and tested using both simulations and experimental data...
March 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29511829/a-novel-approach-to-producing-uniform-3-d-tumor-spheroid-constructs-using-ultrasound-treatment
#16
Solmaz Karamikamkar, Ehsan Behzadfar, Karen C Cheung
Producing three-dimensional (3-D) multicellular tumor spheroids (TSs) is valuable for characterizing anticancer drugs since they provide a more representative model of the 3-D in vivo tumor than conventional two-dimensional (2-D) monolayer culture. The interaction of tumor cells with the extracellular matrix (ECM) in a 3-D culture environment is more similar to a tumor in vivo than in a 2-D environment; cell-cell and cell-ECM interaction can influence cell behaviour, such as in response to drug treatment. In vitro tumor spheroid models have been developed using microfluidic systems to generate 3-D hydrogel beads containing components of alginate and ECM protein, such as collagen, with high uniformity and throughput...
March 6, 2018: Biomedical Microdevices
https://www.readbyqxmd.com/read/29494388/contact-urticaria-to-ultrasound-gel-a-case-report
#17
Sara Cacciapuoti, Anna Masarà, Gabriella Fabbrocini, Cataldo Patruno
No abstract text is available yet for this article.
February 28, 2018: Dermatitis
https://www.readbyqxmd.com/read/29492363/the-case-of-an-obstructed-stone-at-the-distal-urethra
#18
Kelcy Higa, Stephen Irving, Richard J Cervantes, Jayce Pangilinan, Laura R Slykhouse, Dale P Woolridge, Richard Amini
This report highlights a presentation of urinary calculus impacted at the urethral meatus and bedside extraction after evaluation with point-of-care ultrasound (POCUS). Visualization of a stone at the urethral meatus prompted a point-of-care ultrasound of the penile shaft and glans. The ultrasound ruled out anatomic variations such as urethral diverticula and as a result bedside removal was expedited. The stone was successfully removed with traction and intraurethral lidocaine gel without urethral lesions or injury to the meatus...
December 20, 2017: Curēus
https://www.readbyqxmd.com/read/29486594/properties-of-microparticles-from-a-whey-protein-isolate-alginate-emulsion-gel
#19
Alicia M Leon, Wenceslao T Medina, Dong J Park, José M Aguilera
Designing soft, palatable and nutritious texture-modified foods for the elderly is a challenge for food technologists. The aim of this work was to produce and characterize emulsion-gelled microparticles (EGM) made from whey protein isolate (WPI) and sodium alginate (NaAlg) that may be used to modify the rheology of liquid foods and as carriers of lipids and lipophilic nutrients and bioactives. Olive oil microdroplets became embedded in the WPI/NaAlg gel matrix in the form of an emulsion produced by ultrasound (US) or high-speed blending (HSB)...
January 1, 2018: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/29447940/the-relationship-between-plasma-vascular-endothelial-growth-factor-and-erythrocyte-2-3-bisphosphoglycerate-the-putative-role-of-chronic-hypoxia
#20
B K Puri, J A Monro
The non-invasive assessment of chronic tissue hypoxia is difficult. Pulse oximetry only allows the peripheral oxygen saturation to be measured, while the detection of hyperlactataemia needs to take into account the fact that the accumulation of lactic acid may result from several causes other than prolonged tissue hypoxia. Arterial blood oxygen measurement is invasive and often does not give a good indication of the level of tissue hypoxia. Other suggested methods include the use of positron emission tomography, magnetic resonance T2 ∗ relaxation time measurement, photoacoustics and high-frequency ultrasound...
March 2018: Medical Hypotheses
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