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https://www.readbyqxmd.com/read/29452452/-effectivity-and-safety-of-a-modified-tip-design-in-torsional-phacoemulsification
#1
Sabine Schmidt, Sophie Hubich, Jan Markus Vetter, Christopher Wirbelauer
BACKGROUND: Torsional mode phacoemulsification results in more effective fragmentation of the nucleus due to a different movement of the phacotip. In this clinical study, we investigated the influence of a modified tip design and active fluidics on the efficacy of phacoemulsification and safety for the corneal endothelium. MATERIAL AND METHODS: We conducted a prospective randomized 2 : 1 study in which 40 patients were operated on with the mini-flared Kelman Tip using the Infiniti ® System (group 1), and 20 patients were operated on with the Intrepid ® Balanced Tip and the Centurion ® System...
February 16, 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29452433/successful-digital-cholangioscopy-removal-of-a-stent-retriever-tip-migrated-into-the-periphery-of-the-bile-duct
#2
Takeshi Ogura, Atsushi Okuda, Akira Miyano, Nobu Nishioka, Kazuhide Higuchi
No abstract text is available yet for this article.
February 16, 2018: Endoscopy
https://www.readbyqxmd.com/read/29451566/rational-fabrication-of-silver-coated-afm-ters-tips-with-a-high-enhancement-and-long-lifetime
#3
Teng-Xiang Huang, Cha-Wei Li, Li-Kun Yang, Jin-Feng Zhu, Xu Yao, Chuan Liu, Kai-Qiang Lin, Zhi-Cong Zeng, Si-Si Wu, Xiang Wang, Fang-Zu Yang, Bin Ren
Tip-enhanced Raman spectroscopy (TERS), known as nanospectroscopy, has received increasing interest as it can provide nanometer spatial resolution and chemical fingerprint information of samples simultaneously. Since Ag tips are well accepted to show a higher TERS enhancement than that of gold tips, there is an urgent quest for Ag TERS tips with a high enhancement, long lifetime, and high reproducibility, especially for atomic force microscopy (AFM)-based TERS. Herein, we developed an electrodeposition method to fabricate Ag-coated AFM TERS tips in a highly controllable and reproducible way...
February 16, 2018: Nanoscale
https://www.readbyqxmd.com/read/29451170/eus-fna-using-22g-nitinol-or-procore-needles-without-on-site-cytopathology
#4
Charing Ching Ning Chong, Anthony Yuen Bun Teoh, Raymond Shing Yan Tang, Anthony Wing Hung Chan, Enders Kwok Wai Ng, Paul Bo San Lai
Objectives: The project is aimed to compare the tissue sampling rate and the diagnostic accuracy rate of EUS-FNA using 22G nitinol and reverse bevel-tipped needles. Subjects and Methods: This was a prospective, randomized, crossover study in a tertiary academic hospital. All consecutive adult patients undergoing EUS-guided FNA for lesions > 2 cm were recruited. Patients fulfilling the inclusion and exclusion criteria underwent EUS-guided FNA using both needles in sequence...
January 2018: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/29450766/septal-myectomy-for-hypertrophic-cardiomyopathy-important-surgical-knowledge-and-technical-tips-in-the-era-of-increasing-alcohol-septal-ablation
#5
REVIEW
Yuting P Chiang, Yuichi J Shimada, Jonathan Ginns, Shepard D Weiner, Hiroo Takayama
Hypertrophic cardiomyopathy (HCM) is the most commonly inherited cardiac disease-recent studies suggest a prevalence as high as 1 in 200. For symptomatic patients with obstructive HCM who are refractory to medical therapy, septal reduction is indicated. Septal myectomy (SM) is considered the gold standard septal reduction technique. However, due to a shortage of surgeons who are experienced in this technique, alcohol septal ablation (ASA) has overtaken SM as the most commonly performed procedure for obstructive HCM...
February 15, 2018: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29450560/-ecg-results-tips-and-tricks-for-the-correct-diagnosis-bradycardia-and-tachycardia-rhythm-disorders
#6
H-J Trappe
The 12-lead surface electrocardiogram (ECG) is of great importance for the diagnostics of cardiac arrhythmias. For the correct and systematic analysis it has a sensitivity and specificity for the correct diagnosis of supraventricular tachycardia or ventricular tachycardia of more than 95%. Nevertheless, the assessment of cardiac rhythm disorders is difficult for many physicians. In this way errors can occur, frequently due to a non-systematic analysis of the ECG; therefore, the aim of this article is to present the techniques and the necessary knowledge for assessment of the most frequent bradycardiac and tachycardiac heart rhythm disorders...
February 15, 2018: Herz
https://www.readbyqxmd.com/read/29450540/endocan-blockade-suppresses-experimental-ocular-neovascularization-in-mice
#7
Ting Su, Yisheng Zhong, Anna M Demetriades, Jikui Shen, Ailing Sui, Yiyun Yao, Yushuo Gao, Yanji Zhu, Xi Shen, Bing Xie
Purpose: Ocular neovascularization (NV) is a pathologic process characterized by the proliferation and infiltration of various types of cells such as RPE, glial, and endothelial cells, which interact with proangiogenic factors and inflammatory cytokines. Endocan is known to be enriched in retinal endothelial tip cells under hypoxia, but the effect of endocan on ocular NV progression is largely unknown. In this study, we investigated the role of endocan in the ocular NV pathologic process and the possible mechanisms involved...
February 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29449784/immaterial-and-monetary-gifts-in-economic-transactions-evidence-from-the-field
#8
Michael Kirchler, Stefan Palan
Reciprocation of monetary gifts is well-understood in economics. In contrast, there is little research on reciprocal behavior following immaterial gifts like compliments. We narrow this gap and investigate how employees reciprocate after receiving immaterial gifts and material gifts over time. We purchase (1) ice cream from fast food restaurants, and (2) durum doner, a common lunch snack, from independent vendors. Prior to the food's preparation, we either compliment or tip the salesperson. We find that salespersons reciprocate compliments with higher product weight than in a control treatment...
2018: Experimental Economics
https://www.readbyqxmd.com/read/29449590/lateral-force-microscopy-of-interfacial-nanobubbles-friction-reduction-and-novel-frictional-behavior
#9
Chih-Wen Yang, Kwan-Tai Leung, Ren-Feng Ding, Hsien-Chen Ko, Yi-Hsien Lu, Chung-Kai Fang, Ing-Shouh Hwang
Atomic force microscopy is used to conduct single-asperity friction measurements at a water-graphite interface. Local mapping of the frictional force, which is based on the degree of the cantilever twisting, shows nearly friction-free when a tip scans over a nanobubble. Surprisingly, apart from being gapless, the associated friction loop exhibits a tilt in the cantilever twisting versus the tip's lateral displacement with the slope depending on the loading force. The sign of the slope reverses at around zero loading force...
February 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29449449/conserved-and-divergent-features-of-mesenchymal-progenitor-cell-types-within-the-cortical-nephrogenic-niche-of-the-human-and-mouse-kidney
#10
Nils O Lindström, Jinjin Guo, Albert D Kim, Tracy Tran, Qiuyu Guo, Guilherme De Sena Brandine, Andrew Ransick, Riana K Parvez, Matthew E Thornton, Laurence Basking, Brendan Grubbs, Jill A McMahon, Andrew D Smith, Andrew P McMahon
Cellular interactions among nephron, interstitial, and collecting duct progenitors drive mammalian kidney development. In mice, Six2 + nephron progenitor cells (NPCs) and Foxd1 + interstitial progenitor cells (IPCs) form largely distinct lineage compartments at the onset of metanephric kidney development. Here, we used the method for analyzing RNA following intracellular sorting (MARIS) approach, single-cell transcriptional profiling, in situ hybridization, and immunolabeling to characterize the presumptive NPC and IPC compartments of the developing human kidney...
February 15, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29449267/single-cell-transcriptome-analyses-reveal-endothelial-cell-heterogeneity-in-tumors-and-changes-following-anti-angiogenic-treatment
#11
Qi Zhao, Alexandra Eichten, Asma A Parveen, Christina Adler, Ying Huang, Wei Wang, Yueming Ding, Alexander Adler, Thomas Nevins, Min Ni, Yi Wei, Gavin Thurston
Angiogenesis involves dynamic interactions between specialized endothelial tip and stalk cells that are believed to be regulated in part by VEGF and Dll4-Notch signaling. However, our understanding of this process is hampered by limited knowledge of the heterogeneity of endothelial cells and the role of different signaling pathways in specifying endothelial phenotypes. Here we characterized by single cell transcriptomics the heterogeneity of mouse endothelial cells and other stromal cells during active angiogenesis in xenograft tumors as well as from adult normal heart, following pharmacologic inhibition of VEGF and Dll4-Notch signaling...
February 15, 2018: Cancer Research
https://www.readbyqxmd.com/read/29449083/three-dimensional-scapular-dyskinesis-in-hook-plated-acromioclavicular-dislocation-including-hook-motion
#12
Eugene Kim, Seunghee Lee, Hwa-Jae Jeong, Jai Hyung Park, Se-Jin Park, Jaewook Lee, Woosub Kim, Hee Jin Park, So Yeon Lee, Tsuyoshi Murase, Kazuomi Sugamoto, Sumika Ikemoto
BACKGROUND: The purpose of this study is to analyze the 3-dimensional scapular dyskinesis and the kinematics of a hook plate relative to the acromion after hook-plated acromioclavicular dislocation in vivo. Reported complications of acromioclavicular reduction using a hook plate include subacromial erosion and impingement. However, there are few reports of the 3-dimensional kinematics of the hook and scapula after the aforementioned surgical procedure. METHODS: We studied 15 cases of acromioclavicular dislocation treated with a hook plate and 15 contralateral normal shoulders using computed tomography in the neutral and full forward flexion positions...
February 13, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29448685/fabrication-of-si-micro-mold-via-tribo-nanolithography-using-micro-polycrystalline-diamond-cantilever-tool
#13
Uk Su Kim, Jeong Woo Park
A direct mechanical nanomachining, tribo-nanolithography (TNL), has been developed to fabricate micro mold on Si substrate in mechanical milling mode. An atomic force microscope (AFM) tip is replaced by a lab-made Si cantilever with a polycrystalline diamond (PCD) tool. Mechanical cutting by PCD tool enables simple fabrication of micro molds with several tens of nanometers depth. Machined cavities of the Si substrate are prepared as a master mold for additional micro molding using polydimethylsiloxane (PDMS)...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448648/redistribution-of-welding-residual-stresses-of-crack-tip-opening-displacement-specimen-by-local-compression
#14
Young-Gon Kim, Kuk-Hyun Song, Dong-Hoon Lee, Sung-Min Joo
The demand of crack tip opening displacement (CTOD) test which evaluates fracture toughness of a cracked material is very important to ensure the stability of structure under severe service environment. The validity of the CTOD test result is judged using several criterions of the specification standards. One of them is the artificially generated fatigue pre-crack length inside the specimen. For acceptable CTOD test results, fatigue pre-crack must have a reasonable sharp crack front. The propagation of fatigue crack started from the tip of the machined notch, which might have propagated irregularly due to residual stress field...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448387/pressure-evolution-and-deformation-of-confined-granular-media-during-pneumatic-fracturing
#15
Fredrik K Eriksen, Renaud Toussaint, Antoine Léo Turquet, Knut J Måløy, Eirik G Flekkøy
By means of digital image correlation, we experimentally characterize the deformation of a dry granular medium confined inside a Hele-Shaw cell due to air injection at a constant overpressure high enough to deform it (from 50 to 250 kPa). Air injection at these overpressures leads to the formation of so-called pneumatic fractures, i.e., channels empty of beads, and we discuss the typical deformations of the medium surrounding these structures. In addition we simulate the diffusion of the fluid overpressure into the medium, comparing it with the Laplacian solution over time and relating pressure gradients with corresponding granular displacements...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29448333/absolute-and-convective-instabilities-of-a-film-flow-down-a-vertical-fiber-subjected-to-a-radial-electric-field
#16
Rong Liu, Xue Chen, Zijing Ding
We consider the motion of a gravity-driven flow down a vertical fiber subjected to a radial electric field. This flow exhibits rich dynamics including the formation of droplets, or beads, driven by a Rayleigh-Plateau mechanism modified by the presence of gravity as well as the Maxwell stress at the interface. A spatiotemporal stability analysis is performed to investigate the effect of electric field on the absolute-convective instability (AI-CI) characteristics. We performed a numerical simulation on the nonlinear evolution of the film to examine the transition from CI to AI regime...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29447951/suction-electrode-recording-in-locus-coeruleus-of-newborn-rat-brain-slices-reveals-network-bursting-comprising-summated-non-synchronous-spiking
#17
Vladimir Rancic, Bijal Rawal, Bogdan Panaitescu, Araya Ruangkittisakul, Klaus Ballanyi
The brainstem locus coeruleus (LC) controling behaviors like arousal, sleep, breathing, pain or opioid withdrawal is an established model for spontaneous action potential synchronization. Such synchronous 'spiking' might produce an extracellular field potential (FP) which is a crucial tool for neural network analyses. We found using ≥10 μm tip diameter suction electrodes in newborn rat brainstem slices that the LC generates at ∼1 Hz a robust rhythmic FP (rFP). During distinct rFP phases, LC neurons discharge with a jitter of ±33 ms single spikes that summate to a ∼200 ms-lasting population burst...
February 12, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29447917/insertion-of-dengue-e-into-lipid-bilayers-studied-by-neutron-reflectivity-and-molecular-dynamics-simulations
#18
Juan M Vanegas, Frank Heinrich, David M Rogers, Bryan D Carson, Sadie La Bauve, Briana C Vernon, Bulent Akgun, Sushil Satija, Aihua Zheng, Margaret Kielian, Susan B Rempe, Michael S Kent
The envelope (E) protein of Dengue virus rearranges to a trimeric hairpin to mediate fusion of the viral and target membranes, which is essential for infectivity. Insertion of E into the target membrane serves to anchor E and possibly also to disrupt local order within the membrane. Both aspects are likely to be affected by the depth of insertion, orientation of the trimer with respect to the membrane normal, and the interactions that form between trimer and membrane. In the present work, we resolved the depth of insertion, the tilt angle, and the fundamental interactions for the soluble portion of Dengue E trimers (sE) associated with planar lipid bilayer membranes of various combinations of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-rac-glycerol (POPG), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine (POPE), and cholesterol (CHOL) by neutron reflectivity (NR) and by molecular dynamics (MD) simulations...
February 12, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29447327/-unknown-title
#19
(no author information available yet)
BACKGROUND: The lack of nasal tip support resulting in poor protection and projection of the nose is a common cause of nasal obstruction and cosmetic impairment. Although septal cartilage is preferred for restoration of nasal tip support, there is often not enough septal cartilage available. We describe an intercrural columellar strut graft in a circumferential soft tissue pocket: the I-Beam technique. METHODOLOGY: In this cohort study over an 8-year period the clinical and biometrical long-term results after restoration of nasal tip support with an autologous auricular cartilage graft, the I-Beam technique, is evaluated...
February 15, 2018: Rhinology
https://www.readbyqxmd.com/read/29447325/-unknown-title
#20
E Novoa, D Simmen, H R Briner, C Schlegel
BACKGROUND: The lack of nasal tip support resulting in poor protection and projection of the nose is a common cause of nasal obstruction and cosmetic impairment. Although septal cartilage is preferred for restoration of nasal tip support, there is often not enough septal cartilage available. We describe an intercrural columellar strut graft in a circumferential soft tissue pocket: the I-Beam technique. METHODOLOGY: In this cohort study over an 8-year period the clinical and biometrical long-term results after restoration of nasal tip support with an autologous auricular cartilage graft, the I-Beam technique, is evaluated...
February 15, 2018: Rhinology
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