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https://www.readbyqxmd.com/read/28550794/minimal-resection-interposition-arthroplasty-of-the-first-metatarsophalangeal-joint
#1
Panagiotis K Givissis, Panagiotis D Symeonidis, Dimitrios M Kitridis, Dimitrios N Daskalakis, Anastasios G Christodoulou
BACKGROUND: Interposition arthroplasty of the first metatarsophalangeal (MTP) joint is a viable alternative to fusion in patients with advanced hallux rigidus. The purpose of this study is to evaluate the midterm results of a modification of the technique. METHODS: Case series of 18 interposition arthroplasties were performed on 13 female patients with Grade III-IV hallux rigidus. The technique included cheilectomy, bunionectomy when needed, minimal resection of the base of the proximal phalanx and interposition of a fascia lata allograft in the first metatarsophalangeal joint...
March 23, 2017: Foot
https://www.readbyqxmd.com/read/28550512/duplex-ultrasound-versus-clinical-surveillance-in-the-prediction-of-tips-malfunction-placed-for-refractory-ascites-is-ultrasound-surveillance-useful
#2
Shamar Young, Patrick Scanlon, Prashant Sherestha, Jafar Golzarian, Tina Sanghvi
PURPOSE: Since the advent of expanded polytetrafluoroethylene-covered stents and the improved patency they confer for transjugular intrahepatic portosystemic shunt (TIPS), the need to perform ultrasound surveillance has been debated. Prior reports have failed to separately evaluate patients who had TIPS placed for refractory ascites and variceal bleeding. The difference in morbidity from TIPS malfunction between these cohorts argues for distinction between the two. This retrospective review aims to determine whether Duplex ultrasound or return of symptoms more accurately predicts TIPS dysfunction...
May 26, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28550178/severity-of-structural-and-functional-right-ventricular-remodeling-depends-on-training-load-in-an-experimental-model-of-endurance-exercise
#3
Maria Sanz-de la Garza, Cira Rubies, Montserrat Batlle, Bart Bijnens, Lluís Mont, Marta Sitges, Eduard Guasch
An arrhythmogenic right ventricle (RV) remodeling has been reported in response to regular training, but it remains unclear how exercise intensity affects the presence and extent of such remodeling. We aimed at assessing the relationship between RV remodeling and exercise load in a long-term endurance training model. Wistar rats were conditioned to run at moderate (MOD, 45 min, 30cm/s) or intense (INT, 60 min, 60cm/s) workloads for 16 weeks; sedentary rats (SED) served as controls. Cardiac remodeling was assessed with standard echocardiographic and tissue Doppler techniques, sensor-tip pressure catheters and pressure-volume loop analyses...
May 26, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28549895/needle-free-jet-lidocaine-administration-for-preinjection-anesthesia-in-trigger-finger-injection-a%C3%A2-randomized-controlled-trial
#4
Brandon E Earp, Spencer J Stanbury, Ariana N Mora, Philip E Blazar
PURPOSE: To evaluate the efficacy of needle-free jet lidocaine (J-tip) administration for pain reduction in trigger finger corticosteroid injection compared with simultaneous lidocaine injection with corticosteroid. METHODS: A prospective randomized clinical trial was performed in which patients received either 0.25 mL of 2% lidocaine administered by J-tip just prior to 0.5 mL of corticosteroid injection by needle or 0.5 mL of 1% lidocaine and 0.5 mL of corticosteroid administered simultaneously through a needle for the treatment of trigger finger...
May 24, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28549405/twelve-tips-for-the-implementation-of-epas-for-assessment-and-entrustment-decisions
#5
Harm Peters, Ylva Holzhausen, Christy Boscardin, Olle Ten Cate, H Carrie Chen
The concept of entrustable professional activities (EPAs) reframes the approach to assessment in competency-based medical education. Key to this concept is the linking of assessment to decision making about entrusting learners with clinical responsibilities. Based on recent literature and the authors' experiences with implementing EPAs, this article provides practical recommendations for how to implement EPAs for assessment and entrustment decisions in the workplace. Tips for supervising clinicians include talking to learners about trust, using EPA descriptions to guide learning and teaching, providing learners with greater ad hoc responsibilities, using EPAs to identify/create opportunities for assessment and feedback, including case-based discussions and acknowledging gut feelings about learner readiness for more autonomy...
May 26, 2017: Medical Teacher
https://www.readbyqxmd.com/read/28549214/griffith-criterion-for-nanoscale-stress-singularity-in-brittle-silicon
#6
Takashi Sumigawa, Takahiro Shimada, Shuuhei Tanaka, Hiroki Unno, Naoki Ozaki, Shinsaku Ashida, Takayuki Kitamura
Brittle materials such as silicon fail via the crack nucleation and propagation, which is characterized by the singular stress field formed near the crack tip according to Griffith or fracture mechanics theory. The applicability of these continuum-based theories is, however, uncertain and questionable in nanoscale system due to its extremely small singular stress field of only a few nanometers. Here, we directly characterize the mechanical behavior of a nano-crack via the development of in situ nanomechanical testing using a transmission electron microscope, and demonstrate that Griffith or fracture mechanics theory can be applied to even 4-nm stress singularity despite their continuum-based concept...
May 26, 2017: ACS Nano
https://www.readbyqxmd.com/read/28549073/repeated-measurements-of-blood-pressure-and-cholesterol-improves-cardiovascular-disease-risk-prediction-an-individual-participant-data-meta-analysis
#7
Ellie Paige, Jessica Barrett, Lisa Pennells, Michael Sweeting, Peter Willeit, Emanuele Di Angelantonio, Vilmundur Gudnason, Børge G Nordestgaard, Bruce M Psaty, Uri Goldbourt, Lyle G Best, Gerd Assmann, Jukka T Salonen, Paul J Nietert, Wm Monique Verschuren, Eric J Brunner, Richard A Kronmal, Veikko Salomaa, Stephan Jl Bakker, Gilles R Dagenais, Shinichi Sato, Jan-Håkan Jansson, Johann Willeit, Altan Onat, Agustin Gómez de la Cámara, Ronan Roussel, Henry Völzke, Rachel Dankner, Robert W Tipping, Tom W Meade, Chiara Donfrancesco, Lewis H Kuller, Annette Peters, John Gallacher, Daan Kromhout, Hiroyasu Iso, Matthew Knuiman, Edoardo Casiglia, Maryam Kavousi, Luigi Palmieri, Johan Sundström, Barry R Davis, Inger Njølstad, David Couper, John Danesh, Simon G Thompson, Angela Wood
The added value of incorporating information from repeated measurements of blood pressure and cholesterol for cardiovascular disease (CVD) risk prediction has not been rigorously assessed. We used data from the Emerging Risk Factors Collaboration on 191,445 adults (38 cohorts from across 17 countries with data from 1962-2014) with > 1 million measurements of systolic blood pressure, total cholesterol and high-density lipoprotein cholesterol; over a median 12 years of follow-up, 21,170 CVD events occurred...
May 26, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28549044/a-modified-suction-assisted-technique-of-transfer-of-diced-cartilage-graft-to-carrier-material-and-outcome-of-direct-injection-of-unwrapped-diced-cartilage-in-rhinoplasty
#8
Muhammad Mustehsan Bashir, Muhammad Sohail, Farid Ahmad Khan, Sadia Nosheen Jan, Hamid Hussain Ansari, Umer Nazir, Zohaib Hidayat
OBJECTIVE: To describe a modified suction-assisted technique (MSAT) of transfer of diced cartilage (DC) graft to a carrier material and to determine the clinical outcome of direct injection of unwrapped diced cartilage (UDC) in rhinoplasty. PLACE AND DURATION OF STUDY: Department of Plastic Surgery, KEMU, Mayo Hospital, Lahore from February 2011 to January 2015 METHODS:: Forty-seven patients of both genders with types 0 to 3 saddle nose deformity were included. Patients with types 4 and 5 saddle nose deformity, diabetes, hypertension, hepatic or renal disorders were excluded...
May 25, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28548293/local-photocurrent-mapping-and-cell-performance-behaviour-on-a-nanometre-scale-for-monolithically-interconnected-cu-in-ga-se2-solar-cells
#9
M Haggui, B Reinhold, P Andrae, D Greiner, M Schmid, P Fumagalli
The local efficiency of lamellar shaped Cu(In,Ga)Se2 solar cells has been investigated using scanning near-field optical microscopy (SNOM). Topographic and photocurrent measurements have been performed simultaneously with a 100 nm tip aperture. The lamellar shaped solar cell with monolithic interconnects (P scribe) has been investigated on a nanometre scale for the first time at different regions using SNOM. It was found that, the cell region between P1 and P2 significantly contributes to the solar cells overall photocurrent generation...
May 26, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28548051/xenon-gas-field-ion-source-from-a-single-atom-tip
#10
Wei-Chiao Lai, Chun-Yueh Lin, Wei-Tse Chang, Po-Chang Li, Tsu-Yi Fu, Chia-Seng Chang, T T Tsong, Ing-Shouh Hwang
Focused ion beam (FIB) systems have become powerful diagnostic and modification tools for nanoscience and nanotechnology. Gas field ion sources (GFISs) built from atomic-size emitters offer the highest brightness among all ion sources and thus can improve the spatial resolution of FIB systems. Here we show that the Ir/W(111) single-atom tip (SAT) can emit high-brightness Xe(+) ion beams with a high current stability. The ion emission current versus extraction voltage was analyzed from 150 K up to 309 K. The optimal emitter temperature for maximum Xe(+) ion emission was ∼150 K and the reduced brightness at the Xe gas pressure of 1 × 10(-4) torr is two to three orders of magnitude higher than that of a Ga liquid metal ion source, and four to five orders of magnitude higher than that of a Xe inductively coupled plasma ion source...
May 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28547795/synaptogenesis-and-synaptic-protein-localization-in-the-postnatal-development-of-rod-bipolar-cell-dendrites-in-mouse-retina
#11
Zvan A Anastassov, Weiwei Wang, Felice A Dunn
Retinal responses to photons originate in rod photoreceptors and are transmitted to the ganglion cell output of the retina through the primary rod bipolar pathway. At the first synapse of this pathway, input from multiple rods is pooled into individual rod bipolar cells. This architecture is called convergence. Convergence serves to improve sensitivity of rod vision when photons are sparse. Establishment of convergence depends on the development of a proper complement of dendritic tips and transduction proteins in rod bipolar cells...
May 25, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28547294/seasonal-dynamics-of-extraradical-mycelium-and-mycorrhizas-in-a-black-truffle-tuber-melanosporum-plantation
#12
Mikel Queralt, Javier Parladé, Joan Pera, Ana María DE Miguel
Seasonal dynamics of black truffle (Tuber melanosporum) extraradical mycelium as well as the associated mycorrhizal community have been evaluated in a 16-year-old plantation with productive and non-productive trees. Mycelium biomass was seasonally quantified by real-time PCR over two consecutive years and the correlation with environmental variables explored. Extraradical mycelium biomass varied seasonally and between the two consecutive years, being correlated with the precipitation that occurred 1 month before sampling...
May 25, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28546891/scaling-law-to-determine-peak-forces-in-tapping-mode-afm-experiments-on-finite-elastic-soft-matter-systems
#13
Horacio V Guzman
Analytical equations to estimate the peak force will facilitate the interpretation and the planning of amplitude-modulation force microscopy (tapping mode) experiments. A closed-form analytical equation to estimate the tip-sample peak forces while imaging soft materials in liquid environment and within an elastic deformation regime has been deduced. We have combined a multivariate regression method with input from the virial-dissipation equations and Tatara's bidimensional deformation contact mechanics model...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28546697/erratum-comparison-of-olive-tipped-and-conventional-steven-s-cannula-for-sub-tenon-ophthalmic-anesthesia
#14
(no author information available yet)
[This corrects the article on p. 307 in vol. 23, PMID: 27994394.].
January 2017: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/28546340/the-golgi-matrix-protein-giantin-is-required-for-normal-cilia-function-in-zebrafish
#15
Dylan J M Bergen, Nicola L Stevenson, Roderick E H Skinner, David J Stephens, Christina L Hammond
The Golgi is essential for glycosylation of newly synthesised proteins including almost all cell-surface and extracellular matrix proteoglycans. Giantin, encoded by the golgb1 gene, is a member of the golgin family of proteins that reside within the Golgi stack but its function remains elusive. Loss-of-function of giantin in rats causes osteochondrodysplasia; knockout mice show milder defects, notably a cleft palate. In vitro, giantin has been implicated in Golgi organisation, biosynthetic trafficking, and ciliogenesis...
May 25, 2017: Biology Open
https://www.readbyqxmd.com/read/28545818/boron-nitride-nanotubes-as-novel-fillers-for-improving-the-properties-of-dental-adhesives
#16
Felipe Weidenbach Degrazia, Vicente Castelo Branco Leitune, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
OBJECTIVE: This study aimed to evaluate the physical-chemical properties of experimental dental adhesives containing boron nitride nanotubes (BNNTs) as inorganic fillers. METHODS: An experimental adhesive resin was prepared using HEMA-BisGMA, 66/33 wt% (control). Inorganic BNNT fillers were first analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and then incorporated into the adhesive at different concentration (0.05, 0...
May 22, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28545245/multimodal-bio-inspired-tactile-sensing-module-for-surface-characterization
#17
Thiago Eustaquio Alves de Oliveira, Ana-Maria Cretu, Emil M Petriu
Robots are expected to recognize the properties of objects in order to handle them safely and efficiently in a variety of applications, such as health and elder care, manufacturing, or high-risk environments. This paper explores the issue of surface characterization by monitoring the signals acquired by a novel bio-inspired tactile probe in contact with ridged surfaces. The tactile module comprises a nine Degree of Freedom Microelectromechanical Magnetic, Angular Rate, and Gravity system (9-DOF MEMS MARG) and a deep MEMS pressure sensor embedded in a compliant structure that mimics the function and the organization of mechanoreceptors in human skin as well as the hardness of the human skin...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545235/a-high-sensitive-pressure-sensor-using-a-single-mode-fiber-embedded-microbubble-with-thin-film-characteristics
#18
Guanjun Wang, Xinglin Liu, Zhiguo Gui, Yongquan An, Jinyu Gu, Meiqin Zhang, Lu Yan, Gao Wang, Zhibin Wang
A new fiber pressure sensor is proposed and analyzed in this paper. A commercial arc fusion splicer and pressure-assisted arc discharge technology are used here to fabricate a silica hollow microbubble from a common glass tube with the characteristics of a thin film. Then the single mode fiber is embedded into the microbubble to form a fiber Fabry-Perot interferometer by measuring the reflected interference spectrum from the fiber tip and microbubble end. As the wall thickness of the micro-bubble can reach up to several micrometers, it can then be used for measuring the outer pressure with high sensitivity...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28544167/molecular-graph-paper
#19
Marcin Lindner, Michal Valášek, Marcel Mayor, Timo Frauhammer, Wulf Wulfhekel, Lukas Gerhard
We present a self-assembled template of tetraphenylmethane-based variants on a Au(111) surface which feature a periodic lateral arrangement of acetyl groups sticking out of the molecular film. Using the tip of a scanning tunneling microscope, this acetyl group can be removed in a spatially controlled way without a significant effect on the remaining molecular assembly. The chemically modified molecule can readily be distinguished from the original ones such that information can be engraved in the molecular film...
May 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28543980/multicenter-analysis-of-the-use-of-transjugular-intrahepatic-portosystemic-shunt-tips-for-management-of-mpn-associated-portal-hypertension
#20
Christopher R Reilly, Daria V Babushok, Karlyn Martin, Jerry L Spivak, Michael Streiff, Ranjeeta Bahirwani, Jeffrey Mondschein, Brady Stein, Alison Moliterno, Elizabeth O Hexner
BCR-ABL1-negative myeloproliferative neoplasms (MPNs) are clonal stem cell disorders defined by proliferation of one or more myeloid lineages, and carry an increased risk of vascular events and progression to myelofibrosis and leukemia. Portal hypertension (pHTN) occurs in 7-18% of MPN patients via both thrombotic and nonthrombotic mechanisms and portends a poor prognosis. Transjugular intrahepatic portosystemic shunt (TIPS) has been used in the management of MPN-associated pHTN; however, data on long-term outcomes of TIPS in this setting is limited and the optimal management of medically refractory MPN-associated pHTN is not known...
May 24, 2017: American Journal of Hematology
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