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Ablation Techniques

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https://www.readbyqxmd.com/read/28214499/current-techniques-to-treat-pathologic-perforator-veins
#1
Kathleen Ozsvath, Eric Hager, Michael Harlander-Locke, Elna Masuda, Steve Elias, Ellen D Dillavou
Pathologic perforating veins have become an interest to the venous specialist caring for patients with CEAP 4 to 6 disease. Historically, open perforator ligation and then subdermal endoscopic perforator ligation was described. These methods had clear shortcomings. More recently, thermal ablation techniques, including radiofrequency ablation and laser ablation, have been described. Ultrasound-guided sclerotherapy has also been used as a possible means to treat pathologic perforator veins. This report describes and summarizes the updated techniques to treat perforating veins in a challenging patient population...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28214489/ablation-of-the-great-saphenous-vein-with-nontumescent-n-butyl-cyanoacrylate-versus-endovenous-laser-therapy
#2
İsmail Koramaz, Helin El Kılıç, Fatih Gökalp, Macit Bitargil, Nilüfer Bektaş, Ersoy Engin, Mehmet Taşkın Egici, Ahmet Kürşat Bozkurt
OBJECTIVE: The endovenous application of n-butyl cyanoacrylate (NBCA) is a new nontumescent ablation technique for the treatment of venous insufficiency. The aim of this study was to retrospectively compare an NBCA-based ablation method with endovenous laser ablation (EVLA) for the management of incompetent great saphenous veins. METHODS: Between May 2013 and August 2014, there were 339 patients with incompetent varicose veins who were treated with either the endovenous application of NBCA (VariClose Vein Sealing System [VVSS]; Biolas, Ankara, Turkey) or EVLA...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28213875/vehicle-type-affects-filling-of-fractional-laser-ablated-channels-imaged-by-optical-coherence-tomography
#3
Uffe Høgh Olesen, Mette Mogensen, Merete Haedersdal
Ablative fractional laser (AFXL) is an emerging method that enhances topical drug delivery. Penetrating the skin in microscopic, vertical channels, termed microscopic treatment zones (MTZs), the fractional technique circumvents the skin barrier and allows increased uptake of topically applied drugs. This study aims to elucidate the impact of vehicle type on the filling of MTZs from application of liquid, gel, and cream vehicles. Ex vivo pig skin was exposed to 10,600 nm fractional CO2 laser at 5% density, 120 μm beam diameter, and fluences of 40 and 80 mJ/microbeam (mJ/mb)...
February 17, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28213504/adjunctive-interventional-techniques-when-percutaneous-catheter-ablation-for-drug-refractory-ventricular-arrhythmias-fail-a-contemporary-review
#4
Saurabh Kumar, Usha B Tedrow, William G Stevenson
No abstract text is available yet for this article.
February 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28212588/colorectal-polypectomy-and-endoscopic-mucosal-resection-emr-european-society-of-gastrointestinal-endoscopy-esge-clinical-guideline
#5
Monika Ferlitsch, Alan Moss, Cesare Hassan, Pradeep Bhandari, Jean-Marc Dumonceau, Gregorios Paspatis, Rodrigo Jover, Cord Langner, Maxime Bronzwaer, Kumanan Nalankilli, Paul Fockens, Rawi Hazzan, Ian M Gralnek, Michael Gschwantler, Elisabeth Waldmann, Philip Jeschek, Daniela Penz, Denis Heresbach, Leon Moons, Arnaud Lemmers, Konstantina Paraskeva, Juergen Pohl, Thierry Ponchon, Jaroslaw Regula, Alessandro Repici, Matthew D Rutter, Nicholas G Burgess, Michael J Bourke
1 ESGE recommends cold snare polypectomy (CSP) as the preferred technique for removal of diminutive polyps (size ≤ 5 mm). This technique has high rates of complete resection, adequate tissue sampling for histology, and low complication rates. (High quality evidence, strong recommendation.) 2 ESGE suggests CSP for sessile polyps 6 - 9 mm in size because of its superior safety profile, although evidence comparing efficacy with hot snare polypectomy (HSP) is lacking. (Moderate quality evidence, weak recommendation...
February 17, 2017: Endoscopy
https://www.readbyqxmd.com/read/28209559/irreversible-electroporation-for-the-ablation-of-renal-cell-carcinoma-a-prospective-human-in-vivo-study-protocol-ideal-phase-2b
#6
Mara Buijs, Krijn P van Lienden, Peter Gk Wagstaff, Matthijs Jv Scheltema, Daniel M de Bruin, Patricia J Zondervan, Otto M van Delden, Ton G van Leeuwen, Jean Jmch de la Rosette, M Pilar Laguna
BACKGROUND: Irreversible electroporation (IRE) is an emerging technique delivering electrical pulses to ablate tissue, with the theoretical advantage to overcome the main shortcomings of conventional thermal ablation. Recent short-term research showed that IRE for the ablation of renal masses is a safe and feasible treatment option. In an ablate and resect design, histopathological analysis 4 weeks after radical nephrectomy demonstrated that IRE-targeted renal tumors were completely covered by ablation zone...
February 16, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28209456/the-role-of-stereotactic-ablative-body-radiotherapy-in-gynaecological-cancers-a-systematic-review
#7
L C Mendez, E Leung, P Cheung, L Barbera
AIMS: To summarise and evaluate the current literature in gynaecological tumours treated with stereotactic ablative body radiotherapy (SABR) through a systematic review using the Preferred Reported Items for Systematic Reviews and Meta-analysis (PRISMA) guideline. MATERIALS AND METHODS: A literature search through Medline, EMBASE and Cochrane databases resulted in 22 pertinent manuscripts. Selected studies evaluated the locoregional role of SABR in gynaecological tumours, regardless of SABR clinical indication...
February 13, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28207197/changing-the-surgical-dogma-in-frontal-sinus-trauma-transnasal-endoscopic-repair
#8
Jessica W Grayson, Hari Jeyarajan, Elisa A Illing, Do-Yeon Cho, Kristen O Riley, Bradford A Woodworth
BACKGROUND: Management of frontal sinus trauma includes coronal or direct open approaches through skin incisions to either ablate or obliterate the frontal sinus for posterior table fractures and openly reduce/internally fixate fractured anterior tables. The objective of this prospective case-series study was to evaluate outcomes of frontal sinus anterior and posterior table trauma using endoscopic techniques. METHODS: Prospective evaluation of patients undergoing surgery for frontal sinus fractures was performed...
February 16, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28205119/use-of-three-dimensional-computed-tomography-overlay-for-real-time-cryoballoon-ablation-in-atrial-fibrillation-reduces-radiation-dose-and-contrast-dye
#9
B Oude Velthuis, M Molenaar, H G Reinhart Dorman, J Y Stevenhagen, M F Scholten, J van der Palen, J M van Opstal
AIMS: Cryoballoon pulmonary vein (PV) isolation in patients with atrial fibrillation has proven to be effective in short-term and long-term follow-up. To visualise the PV anatomy, pre-ablation contrast pulmonary venography is commonly performed. Three-dimensional (3D) computed tomography (CT) overlay is a new technique creating a live 3D image of the left atrium by integrating a previously obtained CT scan during fluoroscopy. To evaluate the benefits of 3D CT overlay during cryoballoon ablation, we studied the use of 3D CT overlay versus contrast pulmonary venography in a randomised fashion in patients with paroxysmal atrial fibrillation undergoing cryoballoon PV isolation...
February 15, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28202257/radiofrequency-catheter-ablation-of-atrioventricular-node-reentrant-tachycardia-in-children-with-limited-fluoroscopy
#10
Moshe Swissa, Einat Birk, Tamir Dagan, Sody Abby Naimer, Michal Fogelman, Tom Einbinder, Elchanan Bruckheimer, Rami Fogelman
BACKGROUND: Limited fluoroscopy cryo-ablation using a 3D electro-anatomical system (3DS) has been used for AVNRT in children. We aimed to facilitate a fluoroscopy limited approach of RF ablation of AVNRT in children. METHODS: A retrospective study was performed of procedure parameters in children undergoing RF ablation of AVNRT in 75 consecutive children (June 2011 to November 2013 - Group A) using standard fluoroscopy techniques compared to those of 64 consecutive children (December 2013 to May 2015 - Group B), using a fluoroscopy limited approach with 3DS...
January 31, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28195418/upconversion-nanoparticles-synthesized-by-ultra-short-pulsed-laser-ablation-in-liquid-effect-of-stabilizing-environment
#11
Laura Gemini, Tim Schmitz, Rainer Kling, Stephan Barcikowski, Bilal Gökce
The distinctive feature of upconverting compounds to absorb and emit light in the near-infrared region has made upconverting nanoparticles of great interest in various application fields. Nevertheless, these colloids show highly hydrophobic behavior and therefore the use of a proper stabilizing agent is necessary in most cases. Although few chemical techniques for colloid stabilization are available, it is still difficult to achieve a fully reproducible synthesis method for stable upconverting nanoparticle colloids...
February 14, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28195194/in-situ-study-of-nucleation-and-aggregation-phases-for-nanoparticles-grown-by-laser-driven-methods
#12
M Barberio, P Antici
In the last decades, nanomaterials and nanotechnologies have become fundamental and irreplaceable in many fields of science and technology. When used in applications, their properties depend on many factors such as size, shape, internal structure and composition. For this, exact knowledge of their structural features is essential when developing fabrication technologies and searching for new types of nanostructures or nanoparticles with specific properties. For the latter, the knowledge of the precise temporal evolution of the growth processes is fundamental when it comes to industrial production and applications...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28191931/laser-synthesis-and-processing-of-colloids-fundamentals-and-applications
#13
Dongshi Zhang, Bilal Gökce, Stephan Barcikowski
Driven by functionality and purity demand for applications of inorganic nanoparticle colloids in optics, biology, and energy, their surface chemistry has become a topic of intensive research interest. Consequently, ligand-free colloids are ideal reference materials for evaluating the effects of surface adsorbates from the initial state for application-oriented nanointegration purposes. After two decades of development, laser synthesis and processing of colloids (LSPC) has emerged as a convenient and scalable technique for the synthesis of ligand-free nanomaterials in sealed environments...
February 13, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28191783/concise-review-the-potential-use-of-intestinal-stem-cells-to-treat-patients-with-intestinal-failure
#14
Sung Noh Hong, James C Y Dunn, Matthias Stelzner, Martín G Martín
Intestinal failure is a rare life-threatening condition that results in the inability to maintain normal growth and hydration status by enteral nutrition alone. Although parenteral nutrition and whole organ allogeneic transplantation have improved the survival of these patients, current therapies are associated with a high risk for morbidity and mortality. Development of methods to propagate adult human intestinal stem cells (ISCs) and pluripotent stem cells raises the possibility of using stem cell-based therapy for patients with monogenic and polygenic forms of intestinal failure...
February 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28191722/gold-nanoparticles-immobilized-on-electrospun-titanium-dioxide-nanofibers-for-catalytic-reduction-of-4-nitrophenol
#15
Halit Cavusoglu, Burak Zafer Buyukbekar, Huseyin Sakalak, Sebastian Kohsakowski
This study involves the preparation and catalytic properties of anatase titanium dioxide nanofibers (TiO2 NFs) supported gold nanoparticles (Au NPs) using a model reaction based on the reduction of 4-nitrophenol (NP) into 4-aminophenol (AP) by sodium borohydride (NaBH4). The fabrication of surfactant-free Au NPs was performed using pulsed laser ablation in liquid (PLAL) technique. The TiO2 NFs were fabricated by a combination of electrospinning and calcination process using a solution containing poly(vinyl pyrolidone)(PVP) and titanium isopropoxide...
February 13, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28191488/measurement-of-mechanical-tension-at-cell-cell-junctions-using-two-photon-laser-ablation
#16
Xuan Liang, Magdalene Michael, Guillermo A Gomez
The cortical actomyosin cytoskeleton is found in all non-muscle cells where a key function is to control mechanical force (Salbreux et al., 2012). When coupled to E-cadherin cell-cell adhesion, cortical actomyosin generates junctional tension that influences many aspects of tissue function, organization and morphogenesis (Lecuit and Yap, 2015). Uncovering the molecular mechanisms underlying the generation of junctional tension requires tools for measuring it in live cells with a high spatio-temporal resolution...
December 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28190945/mems-based-flexible-force-sensor-for-tri-axial-catheter-contact-force-measurement
#17
Hardik J Pandya, Jun Sheng, Jaydev P Desai
Atrial fibrillation (AFib) is a significant healthcare problem caused by the uneven and rapid discharge of electrical signals from pulmonary veins (PVs). The technique of radiofrequency (RF) ablation can block these abnormal electrical signals by ablating myocardial sleeves inside PVs. Catheter contact force measurement during RF ablation can reduce the rate of AFib recurrence, since it helps to determine effective contact of the catheter with the tissue, thereby resulting in effective power delivery for ablation...
February 2017: Journal of Microelectromechanical Systems
https://www.readbyqxmd.com/read/28188362/comparing-renal-function-preservation-after-laparoscopic-radio-frequency-ablation-assisted-tumor-enucleation-and-laparoscopic-partial-nephrectomy-for-clinical-t1a-renal-tumor-using-a-3d-parenchyma-measurement-system
#18
Liangsong Zhu, Guangyu Wu, Jiwei Huang, Jianfeng Wang, Ruiyun Zhang, Wen Kong, Wei Xue, Yiran Huang, Yonghui Chen, Jin Zhang
PURPOSE: To compare the renal function preservation between laparoscopic radio frequency ablation assisted tumor enucleation and laparoscopic partial nephrectomy. METHODS: Data were analyzed from 246 patients who underwent laparoscopic radio frequency ablation assisted tumor enucleation and laparoscopic partial nephrectomy for solitary cT1a renal cell carcinoma from January 2013 to July 2015. To reduce the intergroup difference, we used a 1:1 propensity matching analysis...
February 10, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28186767/size-control-of-silver-core-silica-shell-nanoparticles-fabricated-by-laser-ablation-assisted-chemical-reduction
#19
Victor A Ermakov, Ernesto Jiménez-Villar, José Maria Clemente da Silva Filho, Emre Yassitepe, Naga Vishnu Vardhan Mogili, Fernando Iikawa, Gilberto Fernandes De Sá, Carlos Lenz Cesar, Francisco C Marques
Aqueous colloidal silver nanoparticles have a substantial potential in biological application as markers and antibacterial agents, and in surface-enhanced Raman spectroscopy (SERS) applications. A simple method of fabrication and encapsulation into an inert shell is of great importance today in order to make their use ubiquitous. Here we show that colloids of Silver-Core/Silica-Shell nanoparticles can be easily fabricated by a laser ablation assisted chemical reduction method and their sizes can be tuned in the range of 2...
February 10, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28186620/an-update-on-the-diagnosis-surgical-management-and-fertility-outcomes-for-women-with-endometrioma
#20
Ryan Cranney, George Condous, Shannon Reid
Endometriosis is estimated to affect up to 50% of infertile women, and severity of endometriosis stage appears to correlate with reduced fertility. Ovarian endometrioma are found in up to 44% of women with endometriosis, and are significantly associated with the presence of pelvic deep infiltrating endometriosis, ovarian adhesions, and pouch of Douglas obliteration. Through the use of MEDLINE and PubMed databases, we conducted a literature review of all available research related to the diagnosis, surgical management and fertility outcomes for women with endometrioma...
February 10, 2017: Acta Obstetricia et Gynecologica Scandinavica
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