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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/28644054/the-thermoexpandable-nitinol-stent-a-long-term-alternative-in-patients-without-nephropathy-or-malignancy
#10
Simone Bier, Bastian Amend, Elena Wagner, Steffen Rausch, Johannes Mischinger, Eva Neumann, Viktoria Stühler, Joerg Hennenlotter, Tilman Todenhoefer, Arnulf Stenzl, Jens Bedke, Stephan Kruck
OBJECTIVE: The aim of this study was to investigate the long-term outcome of a thermoexpandable nickel-titanium nitinol ureteral stent (Memokath 051™) and to identify individual risk factors for failure. MATERIALS AND METHODS: This retrospective single-centre study included 125 patients who underwent implantation of the self-expandable Memokath 051 stent. Complications, indwelling time and reason for explantation were recorded. Analyses were stratified by gender, age, body mass index, American Society of Anesthesiologists score, estimated glomerular filtration rate (eGFR), side, localization and cause of the stricture...
June 23, 2017: Scandinavian Journal of Urology
https://www.readbyqxmd.com/read/28643922/speed-of-human-tooth-movement-in-growers-and-non-growers-selection-of-applied-stress-matters
#11
L R Iwasaki, Y Liu, H Liu, J C Nickel
OBJECTIVES: To test that the speed of tooth translation is not affected by stress magnitude and growth status. SETTING AND SAMPLE POPULATION: Advanced Education Orthodontic clinics at the Universities of Nebraska Medical Center and Missouri-Kansas City. Forty-six consenting subjects with orthodontic treatment plans involving maxillary first premolar extractions. MATERIALS AND METHODS: This randomized split-mouth study used segmental mechanics with definitive posterior anchorage and individual vertical-loop maxillary canine retraction appliances and measured three-dimensional tooth movements...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28612912/temporal-healing-patterns-and-coverage-dynamics-after-new-polish-transcatheter-pfo-occluder-implantation-in-a-swine
#12
Krzysztof Milewski, Roland Fiszer, Piotr Paweł Buszman, Przemysław Węglarz, Adam Janas, Agata Krauze, Michał Jelonek, Piotr Hirnle, Grzegorz Smolka, Robert Gil, Jacek Białkowski, Paweł Eugeniusz Buszman
BACKGROUND: Although currently used devices for interventional closure of patent foramen ovale (PFO) are widely used due to minimally invasive nature of this technique and high success rate, there is still a need to look for new materials and designs in order to improve the treatment outcomes. AIM: To evaluate safety, biocompatibility, temporal healing patterns and coverage dynamics of the new Polish PFO occluder (Balton, Warsaw, Poland) in a swine model - an observation that may assist decision with regard to its first-in-human use and duration of anticoagulation therapy...
June 14, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28612417/length-and-pressure-matter-expediting-evidence-based-progress-in-femoropoliteal-intervention
#13
EDITORIAL
Arka Chatterjee, William B Hillegass
Preprocedural lesion length and ankle-brachial indices (ABI) synergistically predict 12-month patency and repeat revacularization in claudicants treated with bare metal nitinol stents for femoropopliteal disease. This predictive length-ABI model will permit broader evidence-based indirect comparisons of newer femoropopliteal approaches such as drug eluting balloon treatment with or without atherectomy. The length-ABI model is a step to supplement and supplant randomized controlled trials with indirect comparisons as the necessary evidence source expediting innovation and optimizing personalized endovascular therapy for infrainguinal obstructive peripheral arterial disease...
June 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28597743/one-year-results-of-primary-stenting-for-tasc-ii-d-lesions-of-the-superficial-femoral-and-popliteal-arteries
#14
Mehmet Ali Astarcıoglu, Celal Kılıt, Taner Sen, Halil Ibrahim Durmus, Macit Kalcık, Mustafa Ozan Gursoy, Mahmut Yesın, Lale Dinc Asarcıklı, Gokhan Gozubuyuk, Basri Amasyalı
Objective This study aimed to evaluate the safety and the efficacy of primary stenting to treat Trans-Atlantic Inter-Society Consensus II (TASC) D femoropopliteal lesions. Background Advances in wire, balloon and stent design have been reported to improve the durability of stenting of longer femoropopliteal lesions. Methods A total of 57 limbs of 53 patients with Rutherford stage 3 to 6 due to TASC D femoropopliteal lesions were treated with a self-expanding nitinol stent in a prospective, single-centre, observational study...
February 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28595206/transcatheter-closure-of-atrial-septal-defect-with-atrial-septal-occluder-in-a-patient-with-nickel-allergy
#15
Hasan Arı, Selma Arı, Ahmet Tütüncü, Alper Karakuş, Mehmet Melek
Presently described is transcatheter closure of atrial septal defect with atrial septal occluder (ASO) device in a patient with nickel allergy. Patients with metal allergy who will undergo nitinol device implantation should be tested for possible nickel hypersensitivity. ASO device and treatment strategy (percutaneous or surgical) should be selected according to allergy test result.
June 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28594722/treatment-of-complex-fistula-in-ano-with-a-nitinol-proctology-clip
#16
Andreas Nordholm-Carstensen, Peter-Martin Krarup, Kikke Hagen
BACKGROUND: The treatment of complex anocutaneous fistulas remains a major therapeutic challenge balancing the risk of incontinence against the chance of permanent closure. OBJECTIVE: The purpose of this study was to investigate the efficacy of a nitinol proctology clip for closure of complex anocutaneous fistulas. DESIGN: This is a single-center cohort study with retrospective analysis of all of the treated patients. SETTINGS: Data were obtained from patient records and MRI reports, as well as follow-up telephone calls and clinical follow-up with endoanal ultrasonography...
July 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28580267/fatigue-behavior-of-nitinol-anterior-cruciate-ligament-graft-and-inappropriate-femoral-tunnel-placement-single-stage-revision-anterior-cruciate-ligament-reconstruction-surgery
#17
Fatih Karaaslan, Sinan Karaoğlu
Anterior cruciate ligament (ACL) injury is the most common ligament injury in the knee, and progressive instability and disability may develop in a significant number of patients. The incidence of ACL reconstruction is rapidly increasing, as is the number of failures. Although ACL reconstruction is a common procedure, less than satisfactory outcomes have been reported to occur in up to 25% of patients. The reasons for clinical failure after ACL reconstruction are numerous but can be broadly separated into 3 categories: technical, biological, and mechanical failures...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28554520/memokath-stent-failure-in-recurrent-bulbar-urethral-strictures-results-from-an-investigative-pilot-stage-2a-study
#18
Guido Barbagli, Claudio Rimondi, Sofia Balò, Denis Butnaru, Salvatore Sansalone, Massimo Lazzeri
OBJECTIVE: To evaluate the efficacy of the Memokath stent in managing recurrent bulbar urethral strictures. MATERIALS AND METHODS: This is an investigative pilot stage 2A study in patients with a recurrent bulbar urethral stricture who underwent a Memokath stent implant from January 2014 to January 2016 in a single high-volume centre for urethral reconstruction. The Memokath stent (Pnn Medical A/S, Kvistgaard, Denmark) is manufactured from nitinol, a biocompatible alloy of nickel and titanium, which is endoscopically placed...
May 26, 2017: Urology
https://www.readbyqxmd.com/read/28526560/limb-flexion-induced-axial-compression-and-bending-in-human-femoropopliteal-artery-segments
#19
William Poulson, Alexey Kamenskiy, Andreas Seas, Paul Deegan, Carol Lomneth, Jason MacTaggart
BACKGROUND: High failure rates of femoropopliteal artery (FPA) interventions are often attributed in part to severe mechanical deformations that occur with limb movement. Axial compression and bending of the FPA likely play significant roles in FPA disease development and reconstruction failure, but these deformations are poorly characterized. The goal of this study was to quantify axial compression and bending of human FPAs that are placed in positions commonly assumed during the normal course of daily activities...
May 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28522664/non-contrast-enhanced-silent-scan-mr-angiography-of-intracranial-anterior-circulation-aneurysms-treated-with-a-low-profile-visualized-intraluminal-support-device
#20
N Takano, M Suzuki, R Irie, M Yamamoto, K Teranishi, K Yatomi, N Hamasaki, K K Kumamaru, M Hori, H Oishi, S Aoki
BACKGROUND AND PURPOSE: The Low-Profile Visualized Intraluminal Support Device comprises a small-cell nitinol structure and a single-wire braided stent that provides greater metal coverage than previously reported intracranial stents, as well as assumed strong susceptibility artifacts. This study aimed to assess the benefits of non-contrast-enhanced MRA by using a Silent Scan (Silent MRA) for intracranial anterior circulation aneurysms treated with Low-Profile Visualized Intraluminal Support Device stents...
May 18, 2017: AJNR. American Journal of Neuroradiology
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