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https://www.readbyqxmd.com/read/29158178/dissection-enabled-scaffold-assisted-resection-descar-a-novel-technique-for-resection-of-residual-or-non-lifting-gi-neoplasia-of-the-colon-with-video
#1
Matthew W Stier, Christopher G Chapman, Allie Kreitman, John A Hart, Shu-Yuan Xiao, Uzma D Siddiqui, Irving Waxman
BACKGROUND AND AIMS: Due to previous manipulation or submucosal invasion, GI lesions referred for endoscopic mucosal resection (EMR) frequently have flat areas of visible tissue that cannot be snared. Current methods for treating residual tissue may lead to incomplete eradication or not allow complete tissue sampling for histologic evaluation. Our aim is to describe dissection-enabled scaffold-assisted resection (DeSCAR), a new technique combining circumferential ESD with EMR for removal of superficial non-lifting or residual "islands" with suspected submucosal involvement/fibrosis...
November 17, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29151535/multiple-endotracheal-metastases-of-lung-cancer-after-bronchoscopic-intervention-a-case-report
#2
Kazuki Hayasaka, Satoshi Shiono, Naoki Yanagawa
A 65-year-old man presented with obstructive pneumonia due to squamous cell carcinoma of the lung, which invaded the right main bronchus. Argon plasma coagulation was performed, which reduced his symptoms. Right pneumonectomy was performed after preoperative chemotherapy; the pathological diagnosis was T3N1M0 Stage IIIA. Fifteen months after surgery, he presented with bloody sputum. Bronchoscopy showed multiple endotracheal tumors, and a pathological examination revealed squamous cell carcinoma; the same histology as the primary lung cancer...
November 20, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29140375/plasma-of-argon-increases-cell-attachment-and-bacterial-decontamination-on-different-implant-surfaces
#3
Luigi Canullo, Tullio Genova, Hom-Lay Wang, Stefano Carossa, Federico Mussano
PURPOSE: This in vitro study tested the effects of argon atmospheric pressure dielectric barrier discharge (APDBD) on different implant surfaces with regard to physical changes, bacterial decontamination, and osteoblast adhesion. MATERIALS AND METHODS: Seven hundred twenty disks with three different surface topographies-machined (MAC), titanium plasma-sprayed (TPS), and zirconia-blasted and acid-etched (ZRT)-were tested in this experiment. Bacterial adhesion tests were performed repeatedly on a simplified biofilm of Streptococcus mitis...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29137133/reduced-graphene-oxide-on-nickel-foam-for-supercapacitor-electrodes
#4
Uma Ramabadran, Gillian Ryan, Xuan Zhou, Susan Farhat, Felicia Manciu, Yigang Tong, Ryan Ayler, Graham Garner
The focus of this paper is the investigation of reduced graphene oxide (GO)/nickel foam (RGON) samples for use as supercapacitor electrodes. Nickel foam samples were soaked in a GO suspension and dried before being subjected to two different methods to remove oxygen. Atmospheric pressure annealed (APA) samples were treated with a varying number (10-18) of nitrogen plasma jet scans, where sample temperatures did not exceed 280 °C. Furnace annealed (FA) samples were processed in an atmosphere of hydrogen and argon, at temperatures ranging from 600 °C to 900 °C...
November 11, 2017: Materials
https://www.readbyqxmd.com/read/29125213/gastrointestinal-spray-coagulation-with-snare-tip-as-a-rescue-therapy-to-argon-plasma-coagulation-for-bleeding-jejunal-angioectasia
#5
H H Yen
No abstract text is available yet for this article.
December 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29099778/upper-gastrointestinal-bleeding-in-children-a-tertiary-united-kingdom-children-s-hospital-experience
#6
Omar Nasher, David Devadason, Richard J Stewart
The aim of this study was to review the aetiology, presentation and management of these patients with upper gastrointestinal bleeding (UGIB) at a tertiary children's unit in the United Kingdom. This was a retrospective single-institution study on children (<16 years) who presented with acute UGIB over a period of 5 years using known International Classification of Diseases (ICD) codes. A total of 32 children (17 males, 15 females) were identified with a total median age at presentation of 5.5 years. The majority (24/32) of patients presented as an emergency...
November 3, 2017: Children
https://www.readbyqxmd.com/read/29092972/tranexamic-acid-in-treatment-resistant-chronic-transfusion-dependent-gastrointestinal-angiodysplasia-bleeding
#7
Karina V Grooteman, Erwin J M van Geenen, Joost P H Drenth
A small proportion of gastrointestinal angiodysplasia bleeding leads to chronic blood cell transfusion dependency. There are no guidelines supporting decision-making among various treatments in patients with gastrointestinal angiodysplasia bleeding. When endoscopic argon plasma coagulation is ineffective, the angiogenesis inhibitors thalidomide and octreotide can be considered. We describe a 77-year-old woman who had side effects of these angiogenesis inhibitors, which caused her to have continued bleeding...
November 1, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29092495/a-platform-for-exploding-wires-in-different-media
#8
Ruoyu Han, Jiawei Wu, Aici Qiu, Haibin Zhou, Yanan Wang, Jiaqi Yan, Weidong Ding
A platform SWE-2 used for single wire explosion experiments has been designed, established, and commissioned. This paper describes the design and initial experiments of SWE-2. In summary, two pulsed current sources based on pulse capacitors and spark gaps are adopted to drive sub-microsecond and microsecond time scale wire explosions in a gaseous/liquid medium, respectively. In the initial experiments, a single copper wire was exploded in air, helium, and argon with a 0.1-0.3 MPa ambient pressure as well as tap water with a 283-323 K temperature, 184-11 000 μS/cm conductivity, or 0...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29092491/confocal-laser-induced-fluorescence-with-comparable-spatial-localization-to-the-conventional-method
#9
Derek S Thompson, Miguel F Henriquez, Earl E Scime, Timothy N Good
We present measurements of ion velocity distributions obtained by laser induced fluorescence (LIF) using a single viewport in an argon plasma. A patent pending design, which we refer to as the confocal fluorescence telescope, combines large objective lenses with a large central obscuration and a spatial filter to achieve high spatial localization along the laser injection direction. Models of the injection and collection optics of the two assemblies are used to provide a theoretical estimate of the spatial localization of the confocal arrangement, which is taken to be the full width at half maximum of the spatial optical response...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29092487/performance-evaluation-of-a-permanent-ring-magnet-based-helicon-plasma-source-for-negative-ion-source-research
#10
Arun Pandey, M Bandyopadhyay, Dass Sudhir, A Chakraborty
Helicon wave heated plasmas are much more efficient in terms of ionization per unit power consumed. A permanent magnet based compact helicon wave heated plasma source is developed in the Institute for Plasma Research, after carefully optimizing the geometry, the frequency of the RF power, and the magnetic field conditions. The HELicon Experiment for Negative ion-I source is the single driver helicon plasma source that is being studied for the development of a large sized, multi-driver negative hydrogen ion source...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29092486/design-and-test-of-a-simple-fast-electromagnetic-inductive-gas-valve-for-planar-pulsed-inductive-plasma-thruster
#11
Dawei Guo, Mousen Cheng, Xiaokang Li
In support of our planar pulsed inductive plasma thruster research, a fast electromagnetic inductive valve for a gas propellant injection system has been built and tested. A new and important design feature is the use of a conical diaphragm as the action part, which greatly contributes to the virtue of simplicity for adopting the resultant force of the diaphragm deformation as the closing force. An optical transmission technique is adopted to measure the opening and closing characters of the valve while the gas throughput is determined by measuring the pressure change per pulse in a test chamber with a capacitance manometer...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29091063/characterization-of-x-ray-gas-attenuator-plasmas-by%C3%A2-optical-emission-and-tunable-laser-absorption-spectroscopies
#12
Álvaro Martín Ortega, Ana Lacoste, Stéphane Béchu, Alexandre Bès, Nader Sadeghi
X-ray gas attenuators are used in high-energy synchrotron beamlines as high-pass filters to reduce the incident power on downstream optical elements. The absorption of the X-ray beam ionizes and heats up the gas, creating plasma around the beam path and hence temperature and density gradients between the center and the walls of the attenuator vessel. The objective of this work is to demonstrate experimentally the generation of plasma by the X-ray beam and to investigate its spatial distribution by measuring some of its parameters, simultaneously with the X-ray power absorption...
November 1, 2017: Journal of Synchrotron Radiation
https://www.readbyqxmd.com/read/29082456/endoscopic-treatment-of-weight-regain-following-roux-en-y-gastric-bypass-a-systematic-review-and-meta-analysis
#13
REVIEW
Vitor Ottoboni Brunaldi, Pichamol Jirapinyo, Diogo Turiani H de Moura, Ossamu Okazaki, Wanderley M Bernardo, Manoel Galvão Neto, Josemberg Marins Campos, Marco Aurélio Santo, Eduardo G H de Moura
Roux-en-Y gastric bypass (RYGB) is the most commonly performed bariatric procedure. Despite its high efficacy, some patients regain part of their lost weight. Several endoscopic therapies have been introduced as alternatives to treat weight regain, but most of the articles are relatively small with unclear long-term data. To systematically assess the efficacy of endoscopic therapies for weight regain after RYGB. We searched MEDLINE, EMBASE, Scopus, Web of Science, Cochrane, OVID, CINAHL/EBSCo, LILACS/Bireme, and gray literature...
October 29, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29081165/-effectiveness-and-safety-of-argon-plasma-coagulation-via-thoracoscopy-on-the-treatment-of-spontaneous-pneumothorax-with-subpleural-bullae
#14
H Zhang, C S Ge, Z M Sun, X C Bu, L Wang, W Zhang, N Zhao
Objective: To evaluate the effectiveness and safety of argon plasma coagulation (APC) via thoracoscopy on the treatment of spontaneous pneumothorax with subpleural blebs. Methods: Thirty patients with spontaneous pneumothorax with subpleural blebs were retrospectively analyzed during the period of Nov, 2012 to June, 2015 in Rizhao Hospital of Traditional Chinese Medicine. According to the classification of pulmonary bullae through medical thoracoscopy by Reid, type Ⅱand partial type Ⅲ pulmonary bullae (2 cm ≤ diameter <5 cm) were coagulated by argon, and pleural adhesions were mutilated by high frequency electrocision...
October 31, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29078897/investigation-of-blood-coagulation-effect-of-nonthermal-multigas-plasma-jet-in%C3%A2-vitro-and-in%C3%A2-vivo
#15
Yudai Nomura, Toshihiro Takamatsu, Hiroaki Kawano, Hidekazu Miyahara, Akitoshi Okino, Masaru Yoshida, Takeshi Azuma
BACKGROUND: Nonthermal atmospheric pressure plasma (NTAPP) has recently received attention as a novel tool in medicine. It is thought that plasma components yield plasma effects such as sterilization, blood coagulation, and wound healing. These effects are produced without thermal damage. We investigated the blood coagulation effect of NTAPP by using a multigas plasma jet. MATERIALS AND METHODS: Multigas plasma jets can generate NTAPP by several gas species. In this study, argon, oxygen, helium, nitrogen, mock air, and carbon dioxide were used to generate NTAPP, and blood coagulation times were compared with each plasma-treated sample...
November 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/29071037/the-impact-of-plasma-treatment-of-cercon%C3%A2-zirconia-ceramics-on-adhesion-to-resin-composite-cements-and-surface-properties
#16
Kasra Tabari, Sepanta Hosseinpour, Hossein Mohammad-Rahimi
Introduction: In recent years, the use of ceramic base zirconia is considered in dentistry for all ceramic restorations because of its chemical stability, biocompatibility, and good compressive as well as flexural strength. However, due to its chemical stability, there is a challenge with dental bonding. Several studies have been done to improve zirconia bonding but they are not reliable. The purpose of this research is to study the effect of plasma treatment on bonding strength of zirconia. Methods: In this in vitro study, 180 zirconia discs' (thickness was 0...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29052061/comparison-of-two-new-techniques-for-the-management-of-malignant-central-airway-obstruction-argon-plasma-coagulation-with-mechanical-tumor-resection-versus-cryorecanalization
#17
Derya Kızılgöz, Zafer Aktaş, Aydın Yılmaz, Ayperi Öztürk, Fatih Seğmen
BACKGROUND: The development of central airway obstruction during malignant diseases is an important cause of morbidity and mortality. Endobronchial therapies can decrease the patient's symptoms and improve quality of life. Here, we compare airway recanalization methods: argon plasma coagulation with mechanical tumor resection (APC + MTR) and cryorecanalization (CR efficiency, complications, restenosis rate, and time to restenosis) in patients with malignant exophytic endobronchial airway obstruction...
October 19, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29047403/successful-treatment-of-a-recurrent-granulation-polyp-in-the-airways-with-high-dose-rate-brachytherapy-a-case-report
#18
M Polke, J Oelmann-Avendano, A Warth, C P Heussel, F J F Herth, R Eberhardt
BACKGROUND: Benign central airway tumors are very rare diseases. Their unspecific symptoms are responsible for late diagnosis. Endoscopic interventions with different techniques and tools are widely used for their treatment. However, in certain cases interventional endoscopy might be unsuccessful and therefore other methods such as high-dose-rate brachytherapy could be a therapeutic option. CASE PRESENTATION: A 76-year-old white German woman was referred to our clinic for an endoscopic treatment of a recurrent granulation polyp in her left main bronchus...
October 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29030605/cubic-gauche-polymeric-nitrogen-under-ambient-conditions
#19
El Mostafa Benchafia, Zhenhua Yao, Gu Yuan, Tsengmin Chou, Hong Piao, Xianqin Wang, Zafar Iqbal
The long-sought cubic gauche phase of polymeric nitrogen (cg-PN) with nitrogen-nitrogen single bonds has been synthesized together with a related phase by a radio-frequency plasma reaction under near-ambient conditions. Here, we report the synthesis of polymeric nitrogen using a mixture of nitrogen and argon flowing over bulk β-sodium azide or β-sodium azide dispersed on 100 nm long multiwall carbon nanotubes. The cg-PN phase is identified by Raman and attenuated total reflection-Fourier transform infrared spectroscopy, and powder X-ray diffraction...
October 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29017673/iatrogenic-gastrointestinal-perforation-following-therapeutic-endoscopic-procedures-management-and-outcome
#20
Wen Chong Song, Wei Wei Lv, Xiao Zhong Gao
The aim of this study was to analyze the location, the cause and treatment of iatrogenic gastrointestinal perforations following therapeutic endoscopic procedures. Perforation occurred in 12 patients out of 3,389, giving cases occurred intraoperatively or postoperatively. Among them, 6 cases were closed by titanium clipping and 1 case by purse string suture. In another case after cap-assisted endoscopic mucosal resection (EMRC), attempted titanium clipping failed, emergency surgery had to be performed. One each case, after Argon plasma coagulation (APC) and case after endoscopic piecemeal mucosal resection (EPMR), recovered well spontaneously...
September 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
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