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https://www.readbyqxmd.com/read/28429927/endovascular-correction-in-acute-bleeding-after-femoropopliteal-bypass-a-single-centre-experience
#1
Giulia Mazzitelli, Mariagnese Mele, Francesco Setacci, Giuseppe Galzerano, Gianmarco DE Donato, Domenico Benevento, Massimiliano W Guerrieri, Carlo Setacci
INTRODUCTION: The endovascular correction (EC) has emerged in recent years as a possible alternative to surgical revision (SR) in case of bleeding complications after peripheral bypass (PB) . The purpose of this study is to evaluate the efficacy and safety of EC compared to SR in case of bleeding complications of PB. METHODS: From January 2004 to December 2014, we have submitted 32 patients to surgery for acute bleeding in previous PB (25 venous bypass, in situ or reversed, 6 PTFE bypass and 1 composite bypass)...
April 21, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28426290/development-of-a-thoracic-personal-sampler-system-for-co-sampling-of-sulfuric-acid-mist-and-sulfur-dioxide-gas
#2
Chih-Hsiang Chien, Alexandros Theodore, Chufan Zhou, Chang-Yu Wu, Yu-Mei Hsu, Brian Birky
A novel personal sampler was designed to measure inorganic acid mists and gases for determining human exposure levels to these acids in workplaces. This sampler consists of (1) a parallel impactor for classifying aerosol by size following the ISO/CEN/ACGIH defined human thoracic fraction, (2) a cellulose filter to collect the residual acid mist but allowing penetration of sulfur dioxide gas, and (3) an accordion-shaped porous membrane denuder (aPMD) for adsorbing the penetrating sulfur dioxide gas. Acid-resistant PTFE was chosen as the housing material to minimize sampling interference...
April 20, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28423411/a-convenient-technique-for-live-cell-observation-on-the-surface-of-polytetrafluoroethylene-with-a-phase-contrast-microscope
#3
Naoto Inukai, Kazuaki Tanaka, Tatsuya Takizawa
Phase-contrast microscopy is a convenient technique for live-cell observation on the surface of materials with high optical transmittance. Here, we demonstrate a novel technique to observe living cells on the surface of materials with low optical transmittance, such as polytetrafluoroethylene (PTFE), which are widely used in biomaterials for blood-contacting devices. The surface of a cover glass was coated with a thin PTFE layer with sufficient transmittance, thereby enabling the observation of living cells on the PTFE surface with a phase-contrast microscope...
April 1, 2017: Microscopy
https://www.readbyqxmd.com/read/28411802/protein-separation-through-preliminary-experiments-concerning-ph-and-salt-concentration-by-tube-radial-distribution-chromatography-based-on-phase-separation-multiphase-flow-using-a-polytetrafluoroethylene-capillary-tube
#4
Hyo Kan, Kazuhiko Tsukagoshi
Protein mixtures were separated using tube radial distribution chromatography (TRDC) in a polytetrafluoroethylene (PTFE) capillary (internal diameter=100µm) separation tube. Separation by TRDC is based on the annular flow in phase separation multiphase flow and features an open-tube capillary without the use of specific packing agents or application of high voltages. Preliminary experiments were conducted to examine the effects of pH and salt concentration on the phase diagram of the ternary mixed solvent solution of water-acetonitrile-ethyl acetate (8:2:1 volume ratio) and on the TRDC system using the ternary mixed solvent solution...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28391858/dual-thermostating-in-flow-analysis
#5
Tuanne R Dias, Milton K Sasaki, Elias A G Zagatto
An advanced strategy involving concentric tubes is proposed for fast and controlled heating (or cooling) of the reaction medium in flow analysis. Different temperatures are set by sequentially circulating two thermostated water streams through the outer larged bore (2.0mm i.d.) silicone tube, which acted as a water-jacket of the inner (0.8mm i.d.) PTFE tube, and directing the sample zone to flow through it. Each end of the outer tube is connected to a three-way valve that selects the stream to flow inside it...
June 1, 2017: Talanta
https://www.readbyqxmd.com/read/28381770/a-new-strategy-to-refine-crude-indian-sardine-oil
#6
S Charanyaa, Prasanna D Belur, I Regupathi
Current work aims to develop a refining process for removing phospholipids, free fatty acids (FFA), and metal ions without affecting n-3 polyunsaturated fatty acid (n-3 PUFA) esters present in the crude Indian sardine oil. Sardine oil was subjected to degumming with various acids (orthophosphoric acid, acetic acid, and lactic acid), conventional and membrane assisted deacidification using various solvents (methanol, ethanol, propanol and butanol) and bleaching with bleaching agents (GAC, activated earth and bentonite) and all the process parameters were further optimized...
April 4, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28353491/nonprogrammed-vascular-access-is-associated-with-greater-mortality-in-patients-who-return-to-hemodialysis-with-a-failing-renal-graft
#7
Gustavo Laham, Gervasio Soler Pujol, Antonio Vilches, Ana Cusumano, Carlos Diaz
BACKGROUND: In incident hemodialysis (HD) patients the use of catheters is associated with a worse prognosis when compared to those with an arteriovenous fistula (AVF), but the role of vascular access (VA) type in the morbidity and mortality of patients returning to HD with a failing renal allograft is unknown. We aimed to determine the associations between the type of vascular access and mortality in this population. METHODS: This was a retrospective observational cohort study of 138 patients who initiated dialysis after kidney transplant failure between 1995 and 2014...
March 28, 2017: Transplantation
https://www.readbyqxmd.com/read/28345932/formation-of-turmeric-based-thin-films-universal-transparent-coatings
#8
Do Kyoung Yeon, So Hyun Ki, Jeanne Choi, Sung Min Kang, Woo Kyung Cho
Curry stains on clothes and dishes in daily life inspired us to investigate the potential use of turmeric powder, the major ingredient in curry, as a universal coating material. After condition optimization, the coating solution was made by boiling and filtering a turmeric slurry, and the coating was formed at pH 3, leading to the formation of ultrathin, transparent films. Various inorganic and polymeric substrates were successfully coated with turmeric-based materials, including gold, TiO2, SiO2, glass, stainless steel, indium tin oxide, nylon, polyethylene, polycarbonate, polypropylene, acryl, and poly(ethylene terephthalate)...
April 4, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28341509/dialysis-access-hemorrhage-access-rescue-from-a-surgical-emergency
#9
Tazo Inui, Valy Boulom, Dennis Bandyk, John S Lane, Erik Owens, Andrew Barleben
OBJECTIVE: Hemorrhage from a dialysis access can be a life-threatening condition. This study details our experience using access rescue strategies, including in situ graft replacement, primary repair, or conversion to an autogenous fistula; coupled with treatment of central vein occlusion to maintain access usage in patients presenting with conduit hemorrhage. METHODS: During a 3-yr period (2012-2014), 26 patients (14 women, 12 men) on chronic hemodialysis were treated for access conduit bleeding (n=18) or life-threatening hemorrhage (n=8); located in the upper extremity (n=23) or thigh (n=3)...
March 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28340791/solid-phase-extraction-microfluidic-devices-for-matrix-removal-in-trace-element-assay-of-actinide-materials
#10
Jun Gao, Benjamin T Manard, Alonso Castro, Dennis P Montoya, Ning Xu, Rebecca M Chamberlin
Advances in sample nebulization and injection technology have significantly reduced the volume of solution required for trace impurity analysis in plutonium and uranium materials. Correspondingly, we have designed and tested a novel chip-based microfluidic platform, containing a 100-µL or 20-µL solid-phase microextraction column, packed by centrifugation, which supports nuclear material mass and solution volume reductions of 90% or more compared to standard methods. Quantitative recovery of 28 trace elements in uranium was demonstrated using a UTEVA chromatographic resin column, and trace element recovery from thorium (a surrogate for plutonium) was similarly demonstrated using anion exchange resin AG MP-1...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28337011/ptfe-tape-inspiration
#11
H Stean
No abstract text is available yet for this article.
March 24, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28301295/an-in-vitro-tensile-strength-study-on-suturing-technique-and-material
#12
Albert González-Barnadas, Octavi Camps-Font, Dunia Espanya-Grifol, Antoni España-Tost, Rui Figueiredo, Eduard Valmaseda-Castellón
Suture technique and materials are important in preventing complications like wound dehiscences. The purpose of this study was to determine the tensile strength of different suturing techniques, comparing several materials with different diameters. One hundred and sixty sutures were performed using silk, e-PTFE and two types of polyamide (monofilament and Supramid®). Ten simple, 10 horizontal mattress and 10 combinations of the two stitches were performed with the 4-0 gauge of each material. Additionally, 10 simple sutures were performed with the 5-0 gauge of each material...
March 16, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28301016/deflection-and-flexural-strength-effects-on-the-roughness-of-aesthetic-coated-orthodontic-wires
#13
Cibele Gonçalves de Albuquerque, Américo Bortolazzo Correr, Giovana Cherubini Venezian, Milton Santamaria, Carlos Alberto Tubel, Silvia Amélia Scudeler Vedovello
The aim was to evaluate the flexural strength and the effects of deflection on the surface roughness of esthetic orthodontic wires. The sample consisted of 70 archwire 0.014-inch: polytetrafluorethylene (PTFE)-coated Nickel-Titanium (Niti) archwires (Titanol Cosmetic-TC, Flexy Super Elastic Esthetic-FSE, esthetic Nickel Titanium Wire-ANT); epoxy resin-coated Niti archwires (Spectra-S, Niticosmetic-TEC); gold and rhodium coated Niti (Sentalloy-STC) and a control group (superelastic Niti (Nitinol-NS). The initial roughness was evaluated with a rugosimeter...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28296517/therapeutic-algorithm-for-congenital-ptosis-repair-with-levator-resection-and-frontalis-suspension-results-and-literature-review
#14
Riccardo Gazzola, Elena Piozzi, Luca Vaienti, Franz Wilhelm Baruffaldi Preis
BACKGROUND: Several treatments have been described for the treatment of congenital ptosis, but there are few studies that analyze the effectiveness of a therapeutic approach rather than a single technique. AIMS: In this study, we aim to evaluate the effectiveness of our therapeutic algorithm, which relies on levator muscle resection and frontalis suspension with silicone rods, polytetrafluoroethylene (PTFE), or autologous fascia lata. METHODS: We retrospectively analyzed all patients affected by congenital ptosis who underwent corrective surgery at a single department between January 1998 and January 2016...
March 15, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28290661/epitaxy-of-ferroelectric-p-vdf-trfe-films-via-removable-ptfe-templates-and-its-application-in-semiconducting-ferroelectric-blend-resistive-memory
#15
Wei Xia, Christian Peter, Junhui Weng, Jian Zhang, Herbert Kliem, Yulong Jiang, Guodong Zhu
Ferroelectric polymer based devices exhibit great potentials in low-cost and flexible electronics. To meet the requirements of both low voltage operation and low energy consumption, thickness of ferroelectric polymer films is usually required to be less than, for example, 100 nm. However, decrease of film thickness is also accompanied by the degradation of both crystallinity and ferroelectricity and also the increase of current leakage, which surely degrades device performance. Here we report one epitaxy method based on removable poly(tetrafluoroethylene) (PTFE) templates for high-quality fabrication of ordered ferroelectric polymer thin films...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28278107/plasma-treatment-of-polyethersulfone-membrane-for-benzene-removal-from-water-by-air-gap-membrane-distillation
#16
Sara Pedram, Hamid Reza Mortaheb, Farzaneh Arefi-Khonsari
In order to obtain a durable cost-effective membrane for membrane distillation (MD) process, flat sheet polyethersulfone (PES) membranes were modified by an atmospheric pressure nonequilibrium plasma generated using a dielectric barrier discharge in a mixture of argon and hexamethyldisiloxane as the organosilicon precursor. The surface properties of the plasma-modified membranes were characterized by water contact angle (CA), liquid entry pressure, X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy...
March 13, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28275427/resection-and-reconstruction-following-recurrent-malignant-phyllodes-case-report-and-review-of-literature
#17
Aashish Rajesh, Mohammed Farooq
INTRODUCTION: Phyllodes tumors are uncommon biphasic fibroepithelial neoplasms of the breast of varying malignant potential occurring in middle aged women. They exhibit diverse biological behavior. Margin free excision is the mainstay of treatment. CASE PRESENTATION: A 27 year-old lady was referred with a painless ulceroproliferative right breast lesion which had rapidly progressed over six months. Three years back, she had been diagnosed with a borderline phyllodes tumor and underwent a wide local excision followed by a right mastectomy for recurrence...
April 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28269994/holmium-yttrium-aluminum-garnet-laser-and-guidewires-is-there-a-durability-difference-among-guidewires-against-laser-energy-an-in-vitro-experimental-study
#18
Sahin Bagbanci
PURPOSE: To evaluate the durability differences between five different type of guidewires against laser energy in an in vitro experimental ureteral model. METHODS: The study was performed at the Department of Urology, Medicine Faculty of Ahi Evran University. An in vitro experimental ureteral model was created for the work; a silicon ureteral model in a saline-filled container. Experiments were performed on five different type of guidewires; ZIPwire, Sensor polytetrafluoroethylene (PTFE) Nitinol guidewire, Roadrunner(®) PC wire guide, Amplatz Super Stiff, and Zebra Urologic Guidewire...
April 10, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28269739/comparison-of-hexagonal-crystal-structures-between-fluorapatite-and-polytetrafluoroethylene
#19
REVIEW
Masayuki Okazaki
The crystallographic properties of fluorapatite (FAp) and polytetrafluoroethylene (PTFE) as biomedical materials were compared. Both materials contain fluorine and casually belong to the hexagonal crystal system. It is interesting that FAp is an inorganic ionic crystal, while PTFE is an organic covalent-bond crystal. Generally, fluorine contributes to the physicochemical stability and in some cases to the biocompatibility. The crystal structure of FAp was initially analyzed in 1930 by Náray-Szabó, although the analysis of hydroxyapatite (HAp) was markedly delayed until 1964...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28268107/prosthetic-bypass-for-restenosis-after-endarterectomy-or-stenting-of-the-carotid-artery
#20
Giulio Illuminati, Romain Belmonte, Fabrice Schneider, Giulia Pizzardi, Francesco G Calió, Jean-Baptiste Ricco
OBJECTIVE: The objective of this study was to evaluate the results of prosthetic carotid bypass (PCB) with polytetrafluoroethylene (PTFE) grafts as an alternative to carotid endarterectomy (CEA) in treatment of restenosis after CEA or carotid artery stenting (CAS). METHODS: From January 2000 to December 2014, 66 patients (57 men and 9 women; mean age, 71 years) presenting with recurrent carotid artery stenosis ≥70% (North American Symptomatic Carotid Endarterectomy Trial [NASCET] criteria) were enrolled in a prospective study in three centers...
March 4, 2017: Journal of Vascular Surgery
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