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https://www.readbyqxmd.com/read/29792199/nanoparticle-delivery-of-grape-seed-derived-proanthocyanidins-to-airway-epithelial-cells-dampens-oxidative-stress-and-inflammation
#1
S Castellani, A Trapani, A Spagnoletta, L di Toma, T Magrone, S Di Gioia, D Mandracchia, G Trapani, E Jirillo, M Conese
BACKGROUND: Chronic respiratory diseases, whose one of the hallmarks is oxidative stress, are still incurable and need novel therapeutic tools and pharmaceutical agents. The phenolic compounds contained in grape are endowed with well-recognized anti-oxidant, anti-inflammatory, anti-cancer, and anti-aging activities. Considering that natural anti-oxidants, such as proanthocyanidins, have poor water solubility and oral bioavailability, we have developed a drug delivery system based on solid lipid nanoparticles (SLN), apt to encapsulate grape seed extract (GSE), containing proanthocyanidins...
May 23, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29791411/optical-nondestructive-dynamic-measurements-of-wafer-scale-encapsulated-nanofluidic-channels
#2
Vladimir Liberman, Melissa Smith, Isaac Weaver, Mordechai Rothschild
Nanofluidic channels are of great interest for DNA sequencing, chromatography, and drug delivery. However, metrology of embedded or sealed nanochannels and measurement of their fill-state have remained extremely challenging. Existing techniques have been restricted to optical microscopy, which suffers from insufficient resolution, or scanning electron microscopy, which cannot measure sealed or embedded channels without cleaving the sample. Here, we demonstrate a novel method for accurately extracting nanochannel cross-sectional dimensions and monitoring fluid filling, utilizing spectroscopic ellipsometric scatterometry, combined with rigorous electromagnetic simulations...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29789979/model-of-dissolution-in-the-framework-of-tissue-engineering-and-drug-delivery
#3
J A Sanz-Herrera, L Soria, E Reina-Romo, Y Torres, A R Boccaccini
Dissolution phenomena are ubiquitously present in biomaterials in many different fields. Despite the advantages of simulation-based design of biomaterials in medical applications, additional efforts are needed to derive reliable models which describe the process of dissolution. A phenomenologically based model, available for simulation of dissolution in biomaterials, is introduced in this paper. The model turns into a set of reaction-diffusion equations implemented in a finite element numerical framework. First, a parametric analysis is conducted in order to explore the role of model parameters on the overall dissolution process...
May 22, 2018: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29789530/efficient-blood-brain-barrier-opening-in-primates-with-neuronavigation-guided-ultrasound-and-real-time-acoustic-mapping
#4
Shih-Ying Wu, Christian Aurup, Carlos Sierra Sanchez, Julien Grondin, Wenlan Zheng, Hermes Kamimura, Vincent P Ferrera, Elisa E Konofagou
Brain diseases including neurological disorders and tumors remain under treated due to the challenge to access the brain, and blood-brain barrier (BBB) restricting drug delivery which, also profoundly limits the development of pharmacological treatment. Focused ultrasound (FUS) with microbubbles is the sole method to open the BBB noninvasively, locally, and transiently and facilitate drug delivery, while translation to the clinic is challenging due to long procedure, targeting limitations, or invasiveness of current systems...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789468/in-vitro-evaluation-of-2d-printed-edible-films-for-the-buccal-delivery-of-diclofenac-sodium
#5
Georgios K Eleftheriadis, Paraskevi Kyriaki Monou, Nikolaos Bouropoulos, Dimitrios G Fatouros
Printing technologies have recently emerged in the development of novel drug delivery systems toward personalized medicine, to improve the performance of formulations, existing bioavailability patterns, and patients' compliance. In the context of two-dimensional printing, this article presents the development of buccal films that are designed to efficiently deliver a class II compound (diclofenac sodium), according to the Biopharmaceutics Classification System (BCS), to the oral cavity. The preparation of drug-loaded inks was carried out based on solubility studies and evaluation of rheological properties, combining ethanol and propylene glycol as optimal solvents...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29789458/flying-real-time-network-to-coordinate-disaster-relief-activities-in-urban-areas-%C3%A2
#6
Matias Micheletto, Vinicius Petrucci, Rodrigo Santos, Javier Orozco, Daniel Mosse, Sergio F Ochoa, Roc Meseguer
While there have been important advances within wireless communication technology, the provision of communication support during disaster relief activities remains an open issue. The literature in disaster research reports several major restrictions to conducting first response activities in urban areas, given the limitations of telephone networks and radio systems to provide digital communication in the field. In search-and-rescue operations, the communication requirements are increased, since the first responders need to rely on real-time and reliable communication to perform their activities and coordinate their efforts with other teams...
May 22, 2018: Sensors
https://www.readbyqxmd.com/read/29789412/effect-of-a-nebulizer-holding-chamber-on-aerosol-delivery
#7
Rania M Sarhan, Ahmed A Elberry, Nada Saed Abdelwahab, Hoda Rabea, Mohamed Nabil Salem, Mohamed Ea Abdelrahim
BACKGROUND: A new holding chamber was designed to be used with the Aerogen Solo nebulizer to increase the aerosol emitted that reach the patient. The aim of this study was to evaluate the efficacy of this holding chamber with Solo nebulizer and determine its usability with other nebulizers. METHODS: The study was divided into 2 parts. In the first part, aerosol emitted of 1 mL respirable solution (nominal dose of 5000 μg salbutamol), delivered by using the Solo nebulizer, Pro nebulizer, and jet nebulizer, connected to a T-piece or a holding chamber, was determined by using a breathing simulator set to provide a tidal volume of 500 mL, frequency of 15 breaths/min, and the inspiratory-expiratory ratio of 1:1 for adults as the quiet breathing pattern...
May 22, 2018: Respiratory Care
https://www.readbyqxmd.com/read/29787407/identifying-barriers-to-implementation-of-the-national-partnership-for-maternal-safety-obstetric-hemorrhage-bundle-at-a-tertiary-center-utilization-of-the-delphi-method
#8
Annemaria De Tina, Anthony Chau, Daniela A Carusi, Julian N Robinson, Lawrence C Tsen, Michaela K Farber
BACKGROUND: In 2015, the National Partnership for Maternal Safety (NPMS) developed an obstetric hemorrhage consensus bundle to provide birthing facilities in the United States with consistent, validated practice guidelines for postpartum hemorrhage management. The process of implementing each bundle element at a large tertiary labor and delivery unit has not been described; we sought to identify practice deficiencies and perceived barriers to bundle implementation among multidisciplinary providers...
May 21, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29785179/nanoformulation-of-brain-derived-neurotrophic-factor-with-target-receptor-triggered-release-in-the-central-nervous-system
#9
Yuhang Jiang, James M Fay, Chi-Duen Poon, Natasha Vinod, Yuling Zhao, Kristin Bullock, Si Qin, Devika S Manickam, Xiang Yi, William A Banks, Alexander V Kabanov
Brain-derived neurotrophic factor (BDNF) is identified as a potent neuroprotective and neuroregenerative agent for many neurological diseases. Regrettably, its delivery to the brain is hampered by poor serum stability and rapid brain clearance. Here, a novel nanoformulation is reported composed of a bio-compatible polymer, poly(ethylene glycol)- b -poly(L-glutamic acid) (PEG-PLE), that hosts the BDNF molecule in a nanoscale complex, termed here Nano-BDNF. Upon simple mixture, Nano-BDNF spontaneously forms uniform spherical particles with a core-shell structure...
February 7, 2018: Advanced Functional Materials
https://www.readbyqxmd.com/read/29782065/foley-catheter-vs-oral-misoprostol-to-induce-labour-among-hypertensive-women-in-india-a-cost-consequence-analysis-alongside-a-clinical-trial
#10
Simon Leigh, Paul Granby, Alan Haycox, Shuchita Mundle, Hillary Bracken, Vaishali Khedikar, Jayashree Mulik, Brian Faragher, Thomas Easterling, Mark A Turner, Zarko Alfirevic, Beverly Winikoff, Andrew D Weeks
OBJECTIVE: To determine the effectiveness and economic impact of two methods for induction of labour in hypertensive women, in low-resource settings. DESIGN: Cost-consequence analysis of a previously reported multi-centre, parallel, open-label randomized trial. SETTING & POPULATION: 602 women with a live fetus, aged>18 years requiring delivery for pre-eclampsia or hypertension, in two public hospitals in Nagpur, India. METHODS: We performed a formal economic evaluation alongside the INFORM clinical trial...
May 21, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29780789/a-fundamentals-train-the-trainer-approach-to-building-pediatric-critical-care-expertise-in-the-developing-world
#11
Sheri S Crow, Beth A Ballinger, Mariela Rivera, David Tsibadze, Nino Gakhokidze, Nino Zavrashvili, Matthew J Ritter, Grace M Arteaga
Pediatric Fundamental Critical Care Support (PFCCS) is an educational tool for training non-intensivists, nurses, and critical care practitioners in diverse health-care settings to deal with the acute deterioration of pediatric patients. Our objective was to evaluate the PFCCS course as a tool for developing a uniform, reproducible, and sustainable model for educating local health-care workers in the optimal management of critically ill children in the Republic of Georgia. Over a period of 18 months and four visits to the country, we worked with Georgian pediatric critical care leadership to complete the following tasks: (1) survey health-care needs within the Republic of Georgia, (2) present representative PFCCS lectures and simulation scenarios to evaluate interest and obtain "buy-in" from key stakeholders throughout the Georgian educational infrastructure, and (3) identify PFCCS instructor candidates...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29777855/polymer-lipid-hybrid-nanoparticles-as-enhanced-indomethacin-delivery-systems
#12
Annalisa Dalmoro, Sabrina Bochicchio, Shamil F Nasibullin, Paolo Bertoncin, Gaetano Lamberti, Anna Angela Barba, Rouslan I Moustafine
Non-steroidal anti-inflammatory drugs (NSAIDs), i.e. indomethacin used for rheumatoid arthritis and non-rheumatoid inflammatory diseases, are known for their injurious actions on the gastrointestinal (GI) tract. Mucosal damage can be avoided by using nanoscale systems composed by a combination of liposomes and biodegradable natural polymer, i.e. chitosan, for enhancing drug activity. Aim of this study was to prepare chitosan-lipid hybrid delivery systems for indomethacin dosage through a novel continuous method based on microfluidic principles...
May 16, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29777764/deformation-behavior-of-crystallized-mannitol-during-compression-using-a-rotary-tablet-press-simulator
#13
Nicolas Tarlier, Ian Soulairol, Noelia Sanchez-Ballester, Gilles Baylac, Adrien Aubert, Philippe Lefevre, Bernard Bataille, Tahmer Sharkawi
Mannitol is commonly used as a pharmaceutical excipient for tablets; the most widely used oral dosage form for drug delivery. For tableting, mannitol is provided in two different forms: native crystals and textured particles. In order to optimize its formulation, a good understanding of the mechanical behavior mechanism of mannitol is necessary. Thus, the aim of this study is to evaluate the deformation mechanism of native mannitol crystals presenting different particle sizes. Pharmaco-technical and compression studies were performed using mannitol with different mean diameters (160 µm, 50 µm and 25 µm)...
May 16, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29777394/biomechanical-impact-of-wrong-positioning-of-a-dedicated-stent-for-coronary-bifurcations-a-virtual-bench-testing-study
#14
Claudio Chiastra, Maik J Grundeken, Carlos Collet, Wei Wu, Joanna J Wykrzykowska, Giancarlo Pennati, Gabriele Dubini, Francesco Migliavacca
The treatment of coronary bifurcations is challenging for interventional cardiologists. The Tryton stent (Tryton Medical, Inc., USA) is one of the few devices specifically designed for coronary bifurcations that underwent large clinical trials. Although the manufacturer provides specific recommendations to position the stent in the bifurcation side branch (SB) according to four radio-opaque markers under angiographic guidance, wrong device positioning may accidentally occur. In this study, the virtual bench testing approach was used to investigate the impact of wrong positioning of the Tryton stent in coronary bifurcations in terms of geometrical and biomechanical criteria...
May 17, 2018: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/29776892/technique-for-the-administration-of-high-dose-rate-brachytherapy-to-the-bile-duct-using-a-nasobiliary-catheter
#15
Christopher L Deufel, Keith M Furutani, Robert A Dahl, Michael P Grams, Luke B McLemore, Christopher L Hallemeier, Michelle Neben-Wittich, James A Martenson, Michael G Haddock
PURPOSE: Cholangiocarcinoma patients who are potential candidates for liver transplantation may be treated with high-dose-rate (HDR) brachytherapy using a minimally invasive nasobiliary catheter in an effort to escalate the radiotherapy dose to the tumor and maximize local control rates. This work describes the equipment, procedures, and quality assurance (QA) that enables successful administration. METHODS AND MATERIALS: This work describes the nasobiliary catheter placement, simulation, treatment planning, treatment delivery, and QA...
May 16, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29776841/-medical-simulation-as-a-tool-in-the-training-of-perinatal-professionals
#16
B Tosello, J Blanc, C Kelway, V Pellegrin, E Quarello, F Comte, C Zakarian, C D'Ercole
Though technology plays an increasingly important role in modern health systems, human performance remains a major determinant of safety, effectiveness and efficiency of patient care. This is especially true in the delivery room. Thus, the training of professionals must aim not only for the acquisition of theory and practical skills on an individual basis, but also for the learning of teamwork systematically. Training health professionals with simulation enhances their theoretical knowledge and meets formal requirements in literacy, technical skills and communication...
May 15, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29776740/development-of-a-deformable-phantom-for-experimental-verification-of-4d-monte-carlo-simulations-in-a-deforming-anatomy
#17
Sara Gholampourkashi, Joanna E Cygler, Bernie Lavigne, Emily Heath
PURPOSE: To verify the accuracy of 4D Monte Carlo (MC) simulations, using the 4DdefDOSXYZnrc user code, in a deforming anatomy. We developed a tissue-equivalent and reproducible deformable lung phantom and evaluated 4D simulations of delivered dose to the phantom by comparing calculations against measurements. METHODS: A novel deformable phantom consisting of flexible foam, emulating lung tissue, inside a Lucite external body was constructed. A removable plug, containing an elastic tumor that can hold film and other dosimeters, was inserted in the phantom...
May 15, 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29776363/rapid-detection-of-carbapenemase-activity-of-enterobacteriaceae-isolated-from-positive-blood-cultures-by-maldi-tof-ms
#18
Jiajia Yu, Jingxian Liu, Yuanrui Li, Jing Yu, Weinan Zhu, Ying Liu, Lisong Shen
BACKGROUND: Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) has been proved to be a useful tool for identification of pathogens directly isolated from blood cultures in clinical microbiology laboratories. β-Lactam antibiotics are commonly used for treatment of bloodstream infections caused by Enterobacteriaceae strains, and carbapenem is the superlative class of β-lactam antibiotics. Since the carbapenem resistance rate of Enterobacteriaceae strains raised year by year, efficient detection of carbapenemase activity and timely delivery of carbapenem susceptibility reports of Enterobacteriaceae strains isolated from blood cultures is important for clinicians...
May 18, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29775080/mindfulness-meditation-and-interprofessional-cardiopulmonary-resuscitation-a-mixed-methods-pilot-study
#19
Diana J Kelm, Jennifer L Ridgeway, Becca L Gas, Monali Mohan, David A Cook, Darlene R Nelson, Roberto P Benzo
PROBLEM: Mindfulness training includes mindfulness meditation, which has been shown to improve both attention and self-awareness. Medical providers in the intensive care unit often deal with difficult situations with strong emotions, life-and-death decisions, and both interpersonal and interprofessional conflicts. The effect of mindfulness meditation training on healthcare providers during acute care tasks such as cardiopulmonary resuscitation remains unknown. Mindfulness meditation has the potential to improve provider well-being and reduce stress in individuals involved in resuscitation teams, which could then translate into better team communication and delivery of care under stress...
May 18, 2018: Teaching and Learning in Medicine
https://www.readbyqxmd.com/read/29774926/an-anionic-shell-shields-a-cationic-core-allowing-for-uptake-and-release-of-polyelectrolytes-within-core-shell-responsive-microgels
#20
Arjan P H Gelissen, Andrea Scotti, Sarah K Turnhoff, Corinna Janssen, Aurel Radulescu, Andrij Pich, Andrey A Rudov, Igor I Potemkin, Walter Richtering
To realize carriers for drug delivery, cationic containers are required for anionic guests. Nevertheless, the toxicity of cationic carriers limits their practical use. In this study, we investigate a model system of polyampholyte N-isopropylacrylamide (NIPAM)-based microgels with a cationic core and an anionic shell to study whether the presence of a negative shell allows the cationic core to be shielded while still enabling the uptake and release of the anionic guest polyelectrolytes. These microgels are loaded with polystyrene sulfonate of different molecular weights to investigate the influence of their chain length on the uptake and release process...
May 18, 2018: Soft Matter
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