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https://www.readbyqxmd.com/read/29049837/clinical-application-of-projection-mapping-technology-for-surgical-resection-of-lung-metastasis
#1
Toyofumi F Chen-Yoshikawa, Etsuro Hatano, Atsushi Yoshizawa, Hiroshi Date
Indocyanine green fluorescent image-guided surgery was developed to identify primary and metastatic nodules of various malignancies. However, currently, surgeons need to identify the fluorescent image on a monitor, which impedes surgical procedures. Herein, we developed a novel projection mapping device that can cast the real-time fluorescent image onto the surface of the targeted organ. We performed surgical resection of a lung metastasis of hepatoblastoma using this technique. The projection mapping technique clearly detected the pulmonary lesion, and no other lesions were identified in the ipsilateral thorax...
July 28, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049538/3d-printed-mitral-valve-models-affordable-simulation-for-robotic-mitral-valve-repair
#2
Ned Premyodhin, Divneet Mandair, Alice S Ferng, Timothy S Leach, Ryan P Palsma, Mohammad Z Albanna, Zain I Khalpey
OBJECTIVES: 3D printed mitral valve (MV) models that capture the suture response of real tissue may be utilized as surgical training tools. Leveraging clinical imaging modalities, 3D computerized modelling and 3D printing technology to produce affordable models complements currently available virtual simulators and paves the way for patient- and pathology-specific preoperative rehearsal. METHODS: We used polyvinyl alcohol, a dissolvable thermoplastic, to 3D print moulds that were casted with liquid platinum-cure silicone yielding flexible, low-cost MV models capable of simulating valvular tissue...
July 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049327/characteristics-of-pulsatile-flows-in-curved-stenosed-channels
#3
Hyeonji Hong, Eunseop Yeom, Ho Seong Ji, Hyun Dong Kim, Kyung Chun Kim
Spatial and temporal variations of the hemodynamic features occur under pulsatile conditions in complex vessel geometry. Wall shear stress affected by the disturbed flow can result in endothelial cell dysfunction, which leads to atherogenesis and thrombosis. Therefore, detailed understanding of the hemodynamic characteristics in a curved stenosed channel is highly important when examining the pathological effects of hemodynamic phenomena on the progression of atherosclerosis. The present study measures the velocity fields of pulsatile flows with three different Reynolds numbers in 3D curved vessel models with stenosis using time-resolved particle image velocimetry (PIV)...
2017: PloS One
https://www.readbyqxmd.com/read/29049268/patient-and-parent-satisfaction-with-sling-use-after-pediatric-upper-extremity-fractures-a-randomized-controlled-trial-of-a-customized-cast-sling-versus-standard-cast-and-sling
#4
Aristides I Cruz, Steven F DeFroda, Joseph A Gil, Heather Hansen, Alexandre Bolous, Michaela Procaccini, Mark R Zonfrillo
BACKGROUND: Long arm cast immobilization after operative and nonoperative treatment of pediatric upper extremity fractures is common. The use of a sling to aid in carrying the casted extremity as well as provide further immobilization is also common practice. Off-the-shelf slings vary in quality and fit, can be confusing for parents/patients to apply, and lead to frustration and dissatisfaction with its use. The purpose of this investigation was to compare patient/parent centered outcomes after the use of a customized sling compared with a standard sling by utilizing a prospective, randomized-controlled trial...
October 18, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29048905/disentangling-bright-and-dark-interactions-in-ordered-assemblies-of-organic-semiconductors
#5
Peijian Wang, Michael D Barnes
We report on spatially correlated wavelength-resolved photoluminescence and Kelvin Probe Force Microscopy (KPFM) to probe ground state charge-transfer coupling and its correlation with pi-stacking order in nanoscale assemblies of a small molecule n-type organic semiconductor, tetraazaterrylene (TAT). We find a distinct upshift in surface potential contrast (SPC) corresponding to a decrease in work function in TAT in the transition from disordered spun-cast films to ordered crystalline nanowire assemblies, accompanied with a nanowire size dependence in the SPC shift suggesting that the shift depends on both ground state charge transfer interaction and a size-(volume) dependent intrinsic doping associated with the nitrogen substitutions...
October 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/29048695/evaluation-of-late-redislocation-in-patients-who-underwent-open-reduction-and-pelvic-osteotomy-as-treament-for-developmental-dysplasia-of-the-hip
#6
Ümit Tuhanioğlu, Hakan Cicek, Hasan U Ogur, Firat Seyfettinoglu, Ahmet Kapukaya
INTRODUCTION: The goal in the treatment of developmental dysplasia of the hip (DDH) is to achieve a stable and concentric reduction and to create a congruent relationship between the femoral head and the acetabulum. This study discusses the causes of loss of reduction in DDH patients who had a concentrically reduced hip at the time of removal of the hip spica cast and cessation of brace use and who later appeared with hip redislocation after mobilisation and ambulation. In addition, the possible interventions in such cases are also discussed...
October 16, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29047324/three-dimensional-duck-s-feet-collagen-plga-scaffoldforchondrification-role-of-pore-size-and-porosity
#7
Jeong Eun Song, Nirmalya Tripathy, Se Rom Cha, Sung Hyun Jeon, Soon Yong Kwon, Dong Sam Suh, Gilson Khang
An ideal tissue-engineered scaffold must provide sufficient porosity to allow free movement of cells, nutrients, and oxygen for proper cell growth and further maintenance. Owing to variation in pore sizes and shapes of as-fabricated scaffold, the amount of oxygen available for the cells attached to the scaffold and transfer of by-products and excrement will be different, which ultimately results in cell activity.Thus, optimizing pore size and porosity of a scaffold for a specific tissue regeneration are one of the key highlights, which should be considered while designing a scaffold as well as choosing a specific cell type...
October 19, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29046990/active-force-maintains-the-stability-of-a-contractile-ring
#8
Stanard Mebwe Pachong, Kristian K Müller-Nedebock
We investigate a system of sufficiently dense polar actin filaments considered rigid and cross-linked by dimer myosin II protein within the contractile ring. The Langevin dynamics of this system is cast in a functional integral formalism and then transformed into density variables. Using the dynamical Random Phase Approximation (RPA) along with the a one-dimensional Langevin dynamics simulation (LDS), we investigate the structural integrity of the actin bundle network. The active force and the networking force reveal a non-trivial diffusive behaviour of the filaments within the ring...
October 23, 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/29045911/fuzzy-rough-cognitive-networks
#9
Gonzalo Nápoles, Carlos Mosquera, Rafael Falcon, Isel Grau, Rafael Bello, Koen Vanhoof
Rough Cognitive Networks (RCNs) are a kind of granular neural network that augments the reasoning rule present in Fuzzy Cognitive Maps with crisp information granules coming from Rough Set Theory. While RCNs have shown promise in solving different classification problems, this model is still very sensitive to the similarity threshold upon which the rough information granules are built. In this paper, we cast the RCN model within the framework of fuzzy rough sets in an attempt to eliminate the need for a user-specified similarity threshold while retaining the model's discriminatory power...
September 28, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29045308/thirty-days-only-double-antiplatelet-therapy-after-drug-eluting-stenting-could-a-short-term-treatment-be-advantageous
#10
Gianni Casella, Elvira Resciniti, Pamela Gallo
: The duration of dual antiplatelet therapy (DAPT) after coronary stenting has been evaluated in randomized studies with apparently conflicting results. Prolonged DAPT reduces late stent thrombosis and myocardial infarction, but at the expenses of more hemorrhages. On the contrary, bleedings are associated with higher morbidity and mortality. Thus, in patients at high risk of bleeding, the less effective bare-metal stents could be preferred to drug-eluting stents (DES) due to the shortened DAPT needed. However, new DES technology carries a lower risk of stent thrombosis and casts doubts on the recommended prolonged DAPT regimen after DES...
October 16, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29045020/the-selective-role-of-long-range-forces-in-the-stereodynamics-of-ion-molecule-reactions-the-he-methyl-formate-case-from-guided-ion-beam-experiments
#11
Andrea Cernuto, Daniela Ascenzi, Fernando Pirani, Luca Matteo Martini, Paolo Tosi
Long range intermolecular forces play a crucial role in controlling the outcome of ion-molecule chemical reactions, such as those determining the disappearance of organic or inorganic "complex" molecules recently detected in various regions of the interstellar medium due to collisions with abundant interstellar atomic ions (e.g. H+ and He+). Theoretical treatments, e.g. based on simple capture models, are nowadays often adopted to evaluate the collision energy dependence of reactive cross-sections (hereafter indicated as ) and the temperature dependent rate coecients of many ion-molecule reactions...
October 18, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29044193/effect-of-surface-and-internal-defects-on-the-mechanical-properties-of-metallic-glasses
#12
Sunghwan Kim, Seunghwa Ryu
Despite the significance of surface effects on the deformation behaviours of small-scale metallic glasses, systematic investigations on surface states are lacking. In this work, by employing atomistic simulations, we characterise the distributions of local inhomogeneity near surfaces created by casting and cutting, along with internal distributions in pristine and irradiated bulk specimens, and investigate the effects of inhomogeneity on the mechanical properties. The cast surface shows enhanced yield strength and degrees of shear localisation, while the cut surface shows the opposite effects, although the fraction of vibrational soft spots, known to indicate low-energy barriers for local rearrangement, is high near both surfaces...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29043969/-orthodontics-and-alexis-schange-in-1841
#13
Julien Philippe
INTRODUCTION: Alexis Schange was one of the first practitioners able to use accurate casts of the dental arches thanks to the invention of the impression-tray by Delabarre. Consequently, his diagnoses were more precise and his appliances fitted better than those of his predecessors. MATERIALS AND METHOD: The author will first outline the status of Orthodontics prior to Schange and the advent of the first casts, before describing Schange's contribution to Orthodontics...
September 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/29043866/three-dimensional-finite-element-analysis-of-glass-fiber-and-cast-metal-posts-with-different-alloys-for-reconstruction-of-teeth-without-ferrule
#14
Fellippo Ramos Verri, Marlice Hayumi Theles Okumura, Cleidiel Aparecido Araujo Lemos, Daniel Augusto de Faria Almeida, Victor Eduardo de Souza Batista, Ronaldo Silva Cruz, Hiskell Francine Fernandes Oliveira, Eduardo Piza Pellizzer
The aim of this study was to evaluate different materials for restoration of teeth without ferrule by three-dimensional (3D) finite element analysis (FEA). Five models simulating the maxillary central incisor and surrounding bone were simulated according to the type of post: glass fibre post (GFP) or cast metal post (CMP) with different alloys such as gold (Au), silver-palladium (AgPd), copper-aluminum (CuAl) and nickel-chromium (NiCr). Models were designed using Invesalius and Rhinoceros. FEAs were made using FEMAP and NeiNastran, with an applied axial force of 100 N and oblique occlusal load at 45°...
October 18, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29043140/warfarin-related-nephropathy-in-a-patient-with-renal-pelvic-cancer
#15
Yuki Nagasako, Akiko Fujii, Satoshi Furuse, Katsunori Saito, Naobumi Mise
An 83-year-old Japanese man had a history of chronic heart failure due to bradycardia-tachycardia syndrome. He was admitted to our hospital because of macrohematuria and acute kidney injury (AKI), which were detected by an urologist at an outpatient visit. He had a history of recurrent macrohematuria and transurethral resection of bladder tumors twice in the preceding 2 years. He had been on warfarin for 12 years, with a stable international normalized ratio (INR) that was usually less than 2.1. Urinalysis revealed numerous red blood cells (RBCs) and mild proteinuria without RBC casts...
2017: Clin Nephrol Case Stud
https://www.readbyqxmd.com/read/29042726/comparative-evaluation-of-conventional-and-accelerated-castings-on-marginal-fit-and-surface-roughness
#16
Vivek Dattatray Jadhav, Bhagwan K Motwani, Jitendra Shinde, Prasad Adhapure
AIMS: The aim of this study was to evaluate the marginal fit and surface roughness of complete cast crowns made by a conventional and an accelerated casting technique. SETTINGS AND DESIGN: This study was divided into three parts. In Part I, the marginal fit of full metal crowns made by both casting techniques in the vertical direction was checked, in Part II, the fit of sectional metal crowns in the horizontal direction made by both casting techniques was checked, and in Part III, the surface roughness of disc-shaped metal plate specimens made by both casting techniques was checked...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29042116/marginal-discrepancy-dimensions-of-single-unit-metal-crowns-fabricated-by-using-cad-cam-milled-acrylate-resin-polymer-blocks-or-a-conventional-waxing-technique
#17
David Lalande, Jeffrey A Hodd, John S Brousseau, Van Ramos, Daniel Dunham, Frederick Rueggeberg
STATEMENT OF PROBLEM: Because crowns with open margins are a well-known problem and can lead to complications, it is important to assess the accuracy of margins resulting from the use of a new technique. Currently, data regarding the marginal fit of computer-aided design and computer-aided manufacturing (CAD-CAM) technology to fabricate a complete gold crown (CGC) from a castable acrylate resin polymer block are lacking. PURPOSE: The purpose of this in vitro study was to compare marginal discrepancy widths of CGCs fabricated by using either conventional hand waxing or acrylate resin polymer blocks generated by using CAD-CAM technology...
October 14, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29040289/sole-vibration-improves-locomotion-through-the-recovery-of-joint-movements-in-a-mouse-cast-model
#18
Atsushi Doi, Kazuaki Miyamoto, Yu-Shin Nakano, Juntaro Sakasaki, Syota Kasae, Keisuke Nishimura, Min-Chul Shin, Megumu Yoshimura
We investigated the effects of a vibratory stimulus on the plantar surface of the hind limb for motor, sensory, and locomotive function using a mouse cast model. The right knee joint of C57BL/6 male mice (7 weeks, 20 g, n = 31) was flexed with aluminum splint and tape for 6 weeks. These mice were randomly divided into 2 groups (control group, n = 11 and vibration group, n = 12). The mice in the vibration group received vibration on the sole of the ankle for 15 minutes per day, 5 days per week. After the knee joint cast was removed, we measured the range of motion (ROM) of both knee and ankle joints and the sensory threshold of the sole...
2017: PloS One
https://www.readbyqxmd.com/read/29039916/hybrid-nanocomposite-films-comprising-dispersed-vo2-nanocrystals-a-scalable-aqueous-phase-route-to-thermochromic-fenestration
#19
Nathan Fleer, Kate Pelcher, Jian Zou, Kelly Nieto, Lacey Douglas, Diane Sellers, Sarbajit Banerjee
Buildings consume an inordinate amount of energy, accounting for 30-40% of worldwide energy consumption. A major portion of solar radiation is transmitted directly to building interiors through windows, skylights, and glazed doors where the resulting solar heat gain necessitates increased use of air conditioning. Current technologies aimed at addressing this problem suffer from major drawbacks, including a reduction in the transmission of visible light, thereby resulting in increased use of artificial lighting...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29038945/human-germline-editing-a-historical-perspective
#20
Michel Morange
The development of the genome editing system called CRISPR-Cas9 has opened a huge debate on the possibility of modifying the human germline. But the types of changes that could and/or ought to be made have not been discussed. To cast some light on this debate, I will describe the story of the CRISPR-Cas9 system. Then, I will briefly review the projects for modification of the human species that were discussed by biologists throughout the twentieth century. Lastly, I will show that for plenty of reasons, both scientific and societal, germline modification is no longer a priority for our societies...
October 16, 2017: History and Philosophy of the Life Sciences
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