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https://www.readbyqxmd.com/read/28798783/mesh-covered-roadsaver-stent-as-a-new-treatment-modality-for-symptomatic-or-high-risk-carotid-stenosis
#1
Roman Machnik, Piotr Paluszek, Łukasz Tekieli, Karolina Dzierwa, Damian Maciejewski, Mariusz Trystuła, Andrzej Brzychczy, Krzysztof Banaszkiewicz, Robert Musiał, Piotr Pieniążek
INTRODUCTION: Prevention of periprocedural stroke has a crucial role in carotid artery stenting (CAS) procedures. AIM: To assess retrospectively 30-day safety and effectiveness of 41 procedures of internal and common carotid artery stenting using the Roadsaver double nitinol layer micromesh stent in 40 non-consecutive patients with symptomatic or high-risk carotid artery stenosis. MATERIAL AND METHODS: The patients were men (n = 31) and women (n = 9); mean age was 67...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/28794652/stent-tunnel-technique-to-save-thrombosed-native-hemodialysis-fistula-with-extensive-venous-aneurysm
#2
Martin Rabellino, Guillermo J Rosa-Diez, Sergio A Shinzato, Pablo Rodriguez, Oscar A Peralta, Maria S Crucelegui, Rosario Luxardo, Agustina Heredia-Martinez, Mariela I Bedini-Rocca, Ricardo D García-Mónaco
INTRODUCTION AND PURPOSE: The increasing number of patients undergoing hemodialysis and the limited number of access sites have resulted in an increasing number of techniques to maintain vascular access for hemodialysis. Thrombosed arteriovenous (AV) fistulas with large venous aneurysms have poor treatment results, with both endovascular and surgical techniques, leading to a high rate of definitive AV access loss. The purpose of this study was to review the feasibility and initial results of this novel endovascular treatment of thrombosed AV fistulas with large venous aneurysms...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28782151/implantation-of-a-modified-stented-bovine-pulmonary-valve-in-a-beating-heart-sheep-model
#3
Yongshan Zhang, Fei Teng, Juan Xiao, Weiguo Bao, Qingling Zhou, Qiang Sun, Guowei Meng
PURPOSE: The aim of this research was to assess the performance of a modified bovine stent valve implanted transventricularly in the pulmonary position in sheep with a 3-month follow-up period. MATERIALS AND METHODS: Seven modified pulmonary bovine stent valves were transventricularly implanted in the pulmonary position into seven sheep using a delivery system. Stent valve performance was investigated and evaluated hemodynamically, angiographically, and with echocardiograms before, immediately after, and 3 months following implantation...
August 6, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28763518/biomechanical-comparison-of-pin-and-nitinol-bone-staple-fixation-to-pin-and-tension-band-wire-fixation-for-the-stabilization-of-canine-olecranon-osteotomies
#4
Alen Lai, Chris Christou, Craig Bailey, Chris J Tan, John Culvenor, Tian Wang, William R Walsh
OBJECTIVE: To compare the initial biomechanical properties of olecranon osteotomies stabilized with intramedullary pins and a Nitinol bone staple to osteotomies stabilized with pin and tension band wire fixation. STUDY DESIGN: Ex vivo mechanical evaluation on cadaveric bones. MATERIAL AND METHODS: Ten pairs of cadaveric forelimbs from skeletally mature Greyhounds with an olecranon osteotomy stabilized with either a pin and Nitinol bone staple or a pin and tension band wire...
August 1, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28761023/a-comparison-of-the-in-vivo-neoendothelialization-and-wound-healing-processes-of-three-atrial-septal-defect-occluders-used-during-childhood-in-a-nonrandomized-prospective-trial
#5
Derya Aydın Şahin, Osman Başpınar, Ayşe Sülü, Tekin Karslıgil, Seval Kul
OBJECTIVE: We prospectively investigated the neoendothelialization of transcatheter secundum atrial septal defect (ASD) closure in children receiving one of three different occluders. METHODS: Transcatheter ASD closure was performed for 44 children. The patients were divided into three groups: group I: Amplatzer, group II: Lifetech CeraFlex, and group III: Occlutech Figulla Flex II septal occluder. The data were prospectively analyzed. Markers of the three phases of wound healing were studied in all patients before and on the 1st and 10th days and 1st month post intervention...
July 25, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28760124/interphalangeal-arthrodesis-using-an-intramedullary-nitinol-implant-a-prospective-study
#6
Markus Jakubek, Martin Enzendorfer, Rainer Fiala, Klemens Trieb
OBJECTIVES: This study aims to evaluate the nitinol (X-Fuse®) implant in arthrodesis of the distal interphalangeal and the thumb joints with respect to bone fusion and clinical efficiency. PATIENTS AND METHODS: This prospective study included 24 consecutive patients (7 males, 17 females; mean age 56.8 years; range 27 to 79 years) with nitinol (X-Fuse®) implants in their 41 joints. All patients were followed-up clinically and radiographically with respect to fusion, complications and outcome at a minimum of 14 months postoperatively (mean 28±6 months)...
August 2017: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/28759840/an-experimental-canine-patent-ductus-arteriosus-occlusion-device-based-on-shape-memory-polymer-foam-in-a-nitinol-cage
#7
Mark A Wierzbicki, Sarah B Raines, Sonya G Gordon, John C Criscione, Ashley B Saunders, Scott Birch, Bradley Due, Brandis Keller, Landon D Nash, Matthew W Miller, Duncan J Maitland
Patent ductus arteriosus (PDA) is a congenital cardiovascular defect in which a fetal connection between the aorta and pulmonary artery does not spontaneously close shortly after birth. If left uncorrected serious complications and even death can occur. Surgical ligation is the traditional treatment method; however, it is an invasive procedure, that motivates development of a minimally invasive option. Shape memory polymer (SMP) foams are unique materials that hold promise in the field of minimally invasive occlusion devices...
July 25, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28756418/one-year-clinical-outcomes-of-patients-presenting-with-st-segment-elevation-myocardial-infarction-caused-by-bifurcation-culprit-lesions-treated-with-the-stentys-self-apposing-coronary-stent-results-from-the-apposition-iii-study
#8
Maik J Grundeken, Huangling Lu, Nicola Vos, Alexander IJsselmuiden, Robert-Jan van Geuns, Rainer Wessely, Thomas Dengler, Alessio La Manna, Johanne Silvain, Gilles Montalescot, René Spaargaren, Jan G P Tijssen, Robbert J de Winter, Joanna J Wykrzykowska, Giovanni Amoroso, Karel T Koch
OBJECTIVE: To investigate outcomes in patients with ST-segment elevation myocardial infarction (STEMI) after treatment with the Stentys self-apposing stent (Stentys SAS; Stentys S.A.) for bifurcation culprit lesions. BACKGROUND: The nitinol, self-expanding Stentys was initially developed as a dedicated bifurcation stent. The stent facilitates a provisional strategy by accommodating its diameter to both the proximal and distal reference diameters and offering an opportunity to "disconnect" the interconnectors, opening the stent toward the side branch...
August 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28734706/emerging-minimally-invasive-treatment-options-for-male-lower-urinary-tract-symptoms
#9
REVIEW
Giuseppe Magistro, Christopher R Chapple, Mostafa Elhilali, Peter Gilling, Kevin T McVary, Claus G Roehrborn, Christian G Stief, Henry H Woo, Christian Gratzke
CONTEXT: Lower urinary tract symptoms (LUTS) are one of the most common and troublesome nonmalignant conditions affecting quality of life in aging men. A spectrum of established medical and surgical options is available to provide relief of bothersome LUTS. Both the adverse events of medication and the morbidity with surgical treatment modalities have to be counterbalanced against efficacy. Novel minimally invasive treatment options aim to be effective, ideally to be performed in an ambulatory setting under local anaesthesia and to offer a more favourable safety profile than existing reference techniques...
July 19, 2017: European Urology
https://www.readbyqxmd.com/read/28734257/comparison-of-femoropopliteal-artery-stents-under-axial-and-radial-compression-axial-tension-bending-and-torsion-deformations
#10
Kaspars Maleckis, Paul Deegan, William Poulson, Cole Sievers, Anastasia Desyatova, Jason MacTaggart, Alexey Kamenskiy
High failure rates of Peripheral Arterial Disease (PAD) stenting appear to be associated with the inability of certain stent designs to accommodate severe biomechanical environment of the femoropopliteal artery (FPA) that bends, twists, and axially compresses during limb flexion. Twelve Nitinol stents (Absolute Pro, Supera, Lifestent, Innova, Zilver, Smart Control, Smart Flex, EverFlex, Viabahn, Tigris, Misago, and Complete SE) were quasi-statically tested under bench-top axial and radial compression, axial tension, bending, and torsional deformations...
July 13, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28731623/concentric-photothermal-coagulation-with-basket-integrated-optical-device-for-treatment-of-tracheal-stenosis
#11
Van Nam Tran, Hyungshin Lee, Van Gia Truong, Yun-Hee Rhee, Hyun Wook Kang
A basket-integrated optical device is developed to consistently treat tubular tissue by centering an optical diffuser in the lumen. Four nitinol arms in conjunction with the optical diffusing applicator are deployed to induce homogeneous circumferential light emission and concentric photothermal coagulation on tracheal tissue. 1470-nm laser light is employed for the tissue testing at various irradiation conditions and evaluated in terms of thermal gradient and temperature evolution. Preliminary experiments on liver tissue demonstrate the concentric development of the radial thermal coagulation in the tissue (eccentric ratio = ~5...
July 21, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28722294/clinical-outcomes-of-balloon-angioplasty-alone-versus-nitinol-stent-implantation-in-patients-with-small-femoropopliteal-artery-disease-observations-from-the-retrospective-multicenter-analysis-for-femoropopliteal-stenting-real-fp
#12
Norihiko Kamioka, Yoshimitsu Soga, Shoichi Kuramitsu, Osamu Iida, Keisuke Hirano, Kenji Suzuki, Daizo Kawasaki, Terutoshi Yamaoka, Nobuhiro Suematsu, Yoshiaki Shintani, Yusuke Miyashita, Hiroki Takahashi, Taketsugu Tsuchiya, Norihiko Shinozaki, Shinya Okazaki, Kenji Ando
OBJECTIVES: We sought to assess whether balloon angioplasty (BA) alone for small femoropopliteal disease improved the outcome following endovascular therapy as compared with stent implantation. BACKGROUND: The optimal strategy of endovascular therapy for small vessel arteries in femoropopliteal disease remains unclear. METHODS: We performed a multicenter retrospective analysis of 337 consecutive patients (371 limbs) with femoropopliteal arteries 4...
July 19, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28708023/comparison-of-drug-eluting-balloon-angioplasty-with-self-expanding-interwoven-nitinol-stent-deployment-in-patients-with-complex-femoropopliteal-lesions
#13
Burak Teymen, Suleyman Akturk, Ulku Akturk, Muhammed Tdjani
Objective The aim of this study was to compare the drug-eluting balloon with self-expanding interwoven nitinol stent deployment in patients with complex femoropopliteal lesions. Methods We retrospectively identified patients at our clinic with complex femoropopliteal artery lesions treated either with self-expanding interwoven nitinol stent or drug-eluting balloon. All patients had ankle-brachial index measured before and after the intervention, and regular clinical follow-up with Doppler ultrasonography was performed at six months and one year...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/28707350/midterm-to-long-term-safety-and-efficacy-of-self-expandable-nitinol-stent-implantation-for-coarctation-of-aorta-in-adults
#14
Ali Mohammad Haji Zeinali, Mohammad Sadeghian, Shakeel A Qureshi, Payam Ghazi
PURPOSE: Endovascular treatment of coarctation of aorta (CoA) by self-expandable Nitinol stents is one of the recognized treatment methods and may be an alternative to surgery or balloon-expandable stent implantation for CoA but there is little information about midterm to long term results of self-expandable stents. METHODS: Sixty-two patients with CoA (40 men), with a mean age of 30.7 ± 11 years, (range 17-63 years) underwent stent implantation with Optimed self-expandable Nitinol stents between 2005 and 2014...
July 14, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28705512/multi-objective-optimization-of-nitinol-stent-design
#15
G Alaimo, F Auricchio, M Conti, M Zingales
Nitinol stents continuously experience loadings due to pulsatile pressure, thus a given stent design should possess an adequate fatigue strength and, at the same time, it should guarantee a sufficient vessel scaffolding. The present study proposes an optimization framework aiming at increasing the fatigue life reducing the maximum strut strain along the structure through a local modification of the strut profile.The adopted computational framework relies on nonlinear structural finite element analysis combined with a Multi Objective Genetic Algorithm, based on Kriging response surfaces...
July 10, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28705446/a-novel-sax-stent-method-in-treatment-of-ascending-aorta-and-aortic-arch-aneurysms-evaluated-by-finite-element-simulations
#16
M C Arokiaraj, M De Beule, G De Santis
OBJECTIVES: A novel stent method to simplify treatment of proximal ascending aorta and aortic arch aneurysms was developed and investigated by finite element analysis. Therapy of ascending aortic and aortic arch aneurysms is difficult and challenging and is associated with various complications. METHODS: A 55mm wide×120mm long stent was designed without the stent graft and the stent was deployed by an endovascular method in a virtual patient-specific aneurysm model...
February 2017: J Med Vasc
https://www.readbyqxmd.com/read/28690710/the-role-of-simulation-in-the-design-of-a-semi-enclosed-tubular-embolus-retrieval
#17
Xuelian Gu, Yongxiang Qi, Arthur Erdman, Zhonghua Li
A numerical analysis of a semi-enclosed tubular mechanical embolus retrieval device (MERD) for the treatment of acute ischemic stroke (AIS) is presented. In this research, the finite element analysis (FEA) methodology is used to evaluate mechanical performance and provide suggestions for optimizing the geometric design. A MERD fabricated from nickel-titanium alloy (Nitinol) tubing is simulated and analyzed under complex in vivo loading conditions involving shape-setting, crimping, deployment, and embolus retrieval...
June 2017: Journal of Medical Devices
https://www.readbyqxmd.com/read/28688651/feasibility-and-scalability-of-spring-parameters-in-distraction-enterogenesis-in-a-murine-model
#18
Nhan Huynh, Genia Dubrovsky, Joshua D Rouch, Andrew Scott, Matthias Stelzner, Shant Shekherdimian, James C Y Dunn
BACKGROUND: Distraction enterogenesis has been investigated as a novel treatment for short bowel syndrome (SBS). With variable intestinal sizes, it is critical to determine safe, translatable spring characteristics in differently sized animal models before clinical use. Nitinol springs have been shown to lengthen intestines in rats and pigs. Here, we show spring-mediated intestinal lengthening is scalable and feasible in a murine model. MATERIALS AND METHODS: A 10-mm nitinol spring was compressed to 3 mm and placed in a 5-mm intestinal segment isolated from continuity in mice...
July 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28664186/highly-articulated-robotic-needle-achieves-distributed-ablation-of-liver-tissue
#19
Giada Gerboni, Joseph D Greer, Paul F Laeseke, Gloria L Hwang, Allison M Okamura
Robotic needle steering will improve percutaneous radio-frequency ablation (RFA) in the liver by performing distributed ablations without requiring multiple punctures of the liver capsule, thus enabling the treatment of large or multifocal tumors. However, state-of-the-art asymmetric-tip robotic needle steering systems do not yet achieve clinically relevant curvature. This work presents the design and development of a highly articulated needle that enables distributed RFA in liver tissue under ultrasound (US) image guidance...
July 2017: IEEE Robotics and Automation Letters
https://www.readbyqxmd.com/read/28649980/mid-term-outcomes-of-stent-overlap-in-long-total-occluded-lesions-of-superficial-femoral-artery
#20
Ulas Bildirici, Mujdat Aktas, Emir Dervis, Umut Celikyurt
BACKGROUND Superficial femoral artery chronic total occlusion (SCTO) is a common type of peripheral arterial disease (PAD). Endovascular therapy is a treatment approach that has a poor long-term success rate in this group. The aim of this study was to compare the mid-term results of two different uses of nitinol stents in long SCTO lesions (>100 mm): the use of one long stent or two shorter stents. MATERIAL AND METHODS Of 154 patients who underwent percutaneous infrainguinal interventions from 2011 to 2014, a total of 170 CTO lesions were selected for this retrospective study analysis...
June 26, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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