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https://www.readbyqxmd.com/read/29035214/a-graph-cut-approach-to-artery-vein-classification-in-ultra-widefield-scanning-laser-ophthalmoscopy
#1
Enrico Pellegrini, Gavin Robertson, Tom MacGillivray, Jano van Hemert, Graeme Houston, Emanuele Trucco
The classification of blood vessels into arterioles and venules is a fundamental step in the automatic investigation of retinal biomarkers for systemic diseases. In this paper we present a novel technique for vessel classification on ultra-wide-fieldof- view images of the retinal fundus acquired with a scanning laser ophthalmoscope. To our best knowledge, this is the first time that a fully automated artery/vein classification technique for this type of retinal imaging with no manual intervention has been presented...
October 13, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/29034283/endovenous-laser-ablation-of-spermatic-vein-for-the-treatment-of-varicocele
#2
Antonio Basile, Alessandro Motta, Giovanni Failla, Giuseppe Caltabiano, Marco Pizzarelli, Cecilia Gozzo, Davide Castiglione, Stefano Palmucci
INTRODUCTION: Varicocele is a relatively complex pathology of the scrotum veins', known to be one of the easiest to treat. Modern treatment involves both surgical (open, laparoscopic and microsurgery) and interventional approach (either with coils and/or sclerosant injection). Our aim is to demonstrate the feasibility and the reliability of endovenous laser ablation (EVLA) of the spermatic vein for the treatment of varicocele. MATERIALS AND METHODS: We consecutively and prospectively treated 11 patients (age range 24-45 years old, mean 31y) with left varicocele, phlebografically classified as Bahren type I and with indication for percutaneous treatment...
2017: European Journal of Radiology Open
https://www.readbyqxmd.com/read/29033337/five-year-results-of-great-saphenous-vein-treatment-a-meta-analysis
#3
REVIEW
Sterre A S Hamann, Jenny Giang, Marianne G R De Maeseneer, Tamar E C Nijsten, Renate R van den Bos
OBJECTIVES: The most frequently used treatment options for great saphenous vein incompetence are high ligation with stripping (HL+S), endovenous thermal ablation (EVTA), mainly consisting of endovenous laser ablation (EVLA) or radiofrequency ablation, and ultrasound guided foam sclerotherapy (UGFS). The objective of this systematic review and meta-analysis was to compare the long-term efficacy of these different treatment modalities. METHODS: A systematic literature search was performed...
October 12, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29024882/quantitative-mapping-of-elements-in-basil-leaves-ocimum-basilicum-based-on-cesium-concentration-and-growth-period-using-laser-ablation-icp-ms
#4
Jung Aa Ko, Naoki Furuta, Heung Bin Lim
Quantitative elemental mapping of metallic pollutants in sweet basil was studied by laser ablation (LA)-ICP-MS. For this, the sweet basil was cultivated in Hoagland nutrient solution spiked with 100 and 1000 ng mL(-1) of Cs for 10-60 days. Then, the Cs distribution in collected leaves was determined by LA-ICP-MS using lab-synthesized standard pellets based on NIST 1573a tomato leaves. For comparison, S, Ca, and K were also simultaneously determined in this measurement with a(13)C(+) signal from the leaves as an internal standard...
October 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/29020423/noninvasive-high-resolution-functional-macular-imaging-in-subjects-with-retinal-vein-occlusion
#5
Thalmon R Campagnoli, Gábor Márk Somfai, Jing Tian, Delia Cabrera DeBuc, William E Smiddy
BACKGROUND AND OBJECTIVES: Several imaging modalities have been developed to characterize ischemia inherent in retinal vascular diseases. This study aims to predict the impact and to better establish the mechanisms of visual deterioration. A high-resolution functional imaging device is used, yielding quantitative data for macular blood flow and capillary network features in healthy eyes and in eyes with central retinal vein occlusion (CRVO) or branch retinal vein occlusion (BRVO). PATIENTS AND METHODS: This prospective, cross-sectional, comparative case series measured blood flow velocities (BFVs) and noninvasive capillary perfusion maps (nCPMs) in macular vessels in patients with BRVO/CRVO and in healthy controls using the Retinal Function Imager (RFI; Optical Imaging, Rehovot, Israel)...
October 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29019582/ultrasound-guided-foam-sclerotherapy-for-severe-chronic-venous-insufficiency
#6
Guilherme Camargo Gonçalves de-Abreu, Otacílio de Camargo, Márcia Fayad Marcondes de-Abreu, José Luís Braga de-Aquino
Chronic venous insufficiency is characterized by cutaneous alterations caused by venous hypertension; in severe forms, it progresses to lower limb ulcers. Lower limb varicose veins are the main cause of chronic venous insufficiency, and the classic treatment includes surgery and compressive therapy. Minimally invasive alternative treatments for varicose veins include new techniques such as venous thermal ablation using laser or radiofrequency. The use of different methods depends on clinical and anatomical factors...
September 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28976394/-approach-to-venous-diseases-in-the-elderly
#7
Ahmet Kürşat Bozkurt, Ozan Onur Balkanay
Incidence and severity of both deep vein thrombosis and chronic venous insufficiency are increased with age. Today, however, the significance of these diseases in the elderly patient population are still poorly comprehended. Although most patients have a history of previous treatment, chronic venous insufficiency is usually encountered in the advanced clinical stage. As a result, there is an increase in mobility restrictions, the need for assistance in daily activities and the risk of falls in elderly patients...
September 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28966797/toward-monocular-camera-guided-retinal-vein-cannulation-with-an-actively-stabilized-handheld-robot
#8
Shohin Mukherjee, Sungwook Yang, Robert A MacLachlan, Louis A Lobes, Joseph N Martel, Cameron N Riviere
In this paper we describe work towards retinal vessel cannulation using an actively stabilized handheld robot, guided by monocular vision. We employ a previously developed monocular camera based surface reconstruction method using automated laser beam scanning over the retina. We use the reconstructed plane to find a coordinate transform between the 2D image plane coordinate system and the global 3D frame. Within a hemispherical region around the target, we use motion scaling for higher precision. The contribution of this work is the homography matrix estimation using monocular vision and application of the previously developed laser surface reconstruction to Micron guided vein cannulation...
May 2017: IEEE International Conference on Robotics and Automation: ICRA: [proceedings]
https://www.readbyqxmd.com/read/28956693/a-description-of-the-smile-sign-and-multi-pass-technique-for-endovenous-laser-ablation-of-large-diameter-great-saphenous-veins
#9
Emma B Dabbs, Laurensius E Mainsiouw, Judith M Holdstock, Barrie A Price, Mark S Whiteley
Aims To report on great saphenous vein diameter distribution of patients undergoing endovenous laser ablation for lower limb varicose veins and the ablation technique for large diameter veins. Methods We collected retrospective data of 1929 (943 left leg and 986 right leg) clinically incompetent great saphenous vein diameters treated with endovenous laser ablation over five years and six months. The technical success of procedure, complications and occlusion rate at short-term follow-up are reported. Upon compression, larger diameter veins may constrict asymmetrically rather than concentrically around the laser fibre (the 'smile sign'), requiring multiple passes of the laser into each dilated segment to achieve complete ablation...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28954021/alternative-ways-to-optimize-treatment-for-retinal-vein-occlusion-with-peripheral-capillary-non-perfusion-a-pilot-study
#10
Svetlana N Tultseva, Yury S Astakhov, Sergei A Novikov, Pavel A Nechiporenko, Alla B Lisochkina, Andranik Y Ovnanyan, Sergei Y Astakhov
Purpose: We compared the efficacy and safety of ranibizumab versus ranibizumab plus scatter laser photocoagulation (SLP) in patients with chronic post-central retinal vein occlusion (CRVO) macular edema (ME). Methods: This prospective non-randomized pilot study included 250 patients with peripheral retinal ischemia and CRVO-related ME. The mean follow-up period was 24.5 ± 6.5 months. The clinical assessments conducted included best corrected visual acuity, optical coherence tomography, and multi-field fluorescein angiography with measurement of the ischemic area...
July 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28937857/evaluation-of-retinal-blood-flow-before-and-after-panretinal-photocoagulation-using-pattern-scan-laser-for-diabetic-retinopathy
#11
Yoshihisa Yamada, Kiyoshi Suzuma, Naoko Onizuka, Masafumi Uematsu, Yasser Helmy Mohamed, Takashi Kitaoka
PURPOSE: Laser speckle flowgraphy (LSFG) can measure blood flow in the ocular fundus. We analyzed the relationship between retinal blood flow and panretinal photocoagulation (PRP) in diabetic retinopathy. METHODS: This retrospective observational study examined the eyes of 35 patients with proliferative diabetic retinopathy (PDR) or non-PDR (NPDR). PRP was performed using a pattern scan laser. Using LSFG, blood flow was evaluated as the mean blur rate (MBR) or the relative flow volume (RFV)...
September 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28932922/decreased-ocular-blood-flow-after-photocoagulation-therapy-in-neonatal-retinopathy-of-prematurity
#12
Tadashi Matsumoto, Takashi Itokawa, Tomoaki Shiba, Masahiko Tomita, Kotaro Hine, Norio Mizukaki, Hitoshi Yoda, Yuichi Hori
PURPOSE: To evaluate the relationships between optic nerve head blood flow, expressed as mean blur rate (MBR) measured by laser speckle flowgraphy (LSFG), and photocoagulation therapy in neonates with retinopathy of prematurity (ROP). STUDY DESIGN: Case series study. METHODS: We studied 5 ROP neonates either during sleep or under sedation both before and after photocoagulation, and evaluated 8 eyes in which the circulation could be measured three times consecutively...
September 20, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28932398/mid-calf-level-as-a-puncture-site-is-not-safe-enough-for-thermal-ablation-of-the-small-saphenous-vein
#13
Soner Sanioglu, Halit Yerebakan, Ali Ozgen, Huseyin O Ozdemir, Nurcan K Sancar, Mustafa B Farsak
BACKGROUND: Endovenous thermal ablation of the small saphenous vein carries a risk for sural nerve injury. Ablation above mid-calf level is recommended to avoid it. However, this strategy could not eradicate this complication. We present our results of consecutive 30 small saphenous vein thermal ablations which are performed after ultrasonographic identification of the sural nerve. METHODS: We studied 26 consecutive subjects with a total of 30 limbs. Ablation was performed proximal to the risk point by a 1470-nm diode laser...
2017: SAGE Open Medicine
https://www.readbyqxmd.com/read/28927933/azopolymer-photopatterning-for-directional-control-of-angiogenesis
#14
Chiara Fedele, Maria De Gregorio, Paolo A Netti, Silvia Cavalli, Chiara Attanasio
Understanding cellular behavior in response to microenvironmental stimuli is central to tissue engineering. An increasing number of reports emphasize the high sensitivity of cells to the physical characteristics of the surrounding milieu and in particular, topographical cues. In this work, we investigated the influence of dynamic topographic signal presentation on sprout formation and the possibility to obtain a space-time control over sprouting directionality without growth factors, in order to investigate the contribution of just topography in the angiogenic process...
September 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28922697/low-frequency-ranibizumab-versus-dexamethasone-implant-for-macular-oedema-secondary-to-branch-retinal-vein-occlusion
#15
Bora Yuksel, Omer Karti, Ozan Celik, Suleyman Gokhan Kerci, Tuncay Kusbeci
BACKGROUND: The aim was to make a real-world comparison of the efficacy of ranibizumab, dexamethasone and grid laser treatments in macular oedema due to branch retinal vein occlusion (BRVO). METHODS: Forty-four eyes of 44 consecutive patients with macular oedema secondary to BRVO were included. Treatment arms comprised standard care (StCARE, n = 15), intravitreal ranibizumab (RNB, n = 14) and dexamethasone implant (DEX, n = 15). No rescue laser was performed in DEX and RNB groups...
September 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28918305/single-center-experience-with-percutaneous-extraction-of-cardiac-implantable-electric-devices
#16
Ayako Okada, Morio Shoda, Hiroaki Tabata, Wataru Shoin, Hideki Kobayashi, Takahiro Okano, Koji Yoshie, Yasutaka Oguchi, Takahiro Takeuchi, Ken Kato, Koichiro Kuwahara
BACKGROUND: The estimated incidence of infected cardiac implantable electric devices (CIED) has recently increased to 1-2% in Japan. Extraction of long-term implanted devices is generally difficult. There are few reports about lead extraction in Japan. We describe our experience with and outcomes of lead extraction using excimer lasers, mechanical sheaths, and manual extraction. METHODS: We retrospectively analyzed the characteristics, types of devices, and indications for extraction in 29 patients with 67 leads who required CIED lead extraction at Shinshu University Hospital between April 2014 and October 2016...
September 13, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28916115/-retinal-vein-occlusions
#17
REVIEW
A Pierru, J-F Girmens, E Héron, M Paques
Retinal venous occlusions comprise central retinal vein occlusion, hemiretinal vein occlusions, and branch retinal vein occlusions. They are associated with arterial hypertension and glaucoma. Retinal vein occlusions occur more frequently in males, at a median age of 55. The pathogenesis of retinal venous occlusions remains obscure. The clinical presentation of the disease is variable. In most cases, there is a unilateral visual loss over days with a painless, white and quiet eye. However, retinal venous occlusions may also present as an abrupt and profound loss of vision, or be asymptomatic...
October 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28915292/news-views-and-reviews-a-tool-for-my-laser-practice-i-simply-can-t-do-without-shining-a-light-on-my-favorite-light-source
#18
Eric F Bernstein
With laser surgery, what you see is what you get. Visualizing the target for treatment, be it a port-wine stain, a cluster of spider veins, a tattoo or freckles, or simply photodamaged skin requires seeing through surface reflections, dry skin, and often quite dark laser goggles. The tool that has been indispensable to me in my practice is the Syris v900L polarizing and magnifying headlamp. This indispensable tool makes laser treatment more precise, effective, and easier by truly shining a light on the subject of a laser treatment...
September 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28912938/comparison-of-endovenous-laser-and-radiofrequency-ablation-in-treating-varices-in-the-same-patient
#19
Orhan Bozoglan, Bulent Mese, Erdinc Eroglu, Hasan Cetin Ekerbiçer, Alptekin Yasim
Introduction: To compare endovenous laser ablation (EVLA) and radiofrequency ablation (RFA) in different legs in the same individual in patients with venous insufficiency. Methods: Sixty patients with bilateral saphenous vein insufficiency were included. EVLA or RFA was applied to one of the patient's legs and RFA or EVLA to the other leg. Results: EVLA and RFA complications were hyperemia at 20.7% and 31.0%, ecchymosis at 31.0% and 51.7% and edema at 27.6% and 65.5%, respectively. The rate of recanalization was 6...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/28902831/-endovenous-thermal-interventions-in-treatment-of-patients-with-lower-limb-varicose-veins
#20
A N Kulikova, S V Khaĭrutdinov
The problem regarding treatment of patients suffering from lower limb varicose veins remains a matter of current concern and is important today because of high prevalence of the pathology concerned and a steadily growing number of newly diagnosed cases. Mention should be made that both Russian and foreign phlebologists along with an open surgical operation on veins have more and more often been using minimally invasive endovenous techniques in comprehensive management of patients presenting with varicose veins...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
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