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https://www.readbyqxmd.com/read/28612912/temporal-healing-patterns-and-coverage-dynamics-after-new-polish-transcatheter-pfo-occluder-implantation-in-a-swine
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/28501130/collateral-artery-pathways-of-the-femoral-and-popliteal-artery
#10
Rombout R Kruse, Denise E Doomernik, Kasper V Maltha, Jan G M Kooloos, Tamas L Kozicz, Michel M P J Reijnen
BACKGROUND: The role of collateral artery circulation in the lower limb is under debate but clinically relevant, particularly when using covered stents for occlusive disease. Covered stents seem to outperform nitinol stents in extensive disease, but collaterals could be essential in case of acute thrombosis. In the present study, we describe the collateral pathways of the deep and superficial femoral artery (DFA, SFA) and the popliteal artery (PA), observed in human cadavers. METHODS: Ten fresh frozen cadaver legs were selected...
May 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28499054/manual-removal-of-intraocular-lens-silicone-oil-droplets-and-dystrophic-calcifications-using-a-nitinol-loop-a-case-series
#11
Kareem Moussa, Theodore Leng, Julius T Oatts, Robert B Bhisitkul, David G Hwang, Jay M Stewart
Deposition of dystrophic calcifications on the posterior surface of silicone intraocular lenses (IOLs) has been reported in patients with asteroid hyalosis. Accumulation of silicone oil droplets on the posterior surface of silicone IOLs in silicone-filled eyes has also been reported. Recently, a novel technique to manually remove dystrophic calcifications using a nickel titanium loop (Finesse Flex Loop; Alcon, Fort Worth, TX) was described, obviating the need for IOL exchange. Here, the authors report their outcomes with this technique in five eyes with IOL dystrophic calcifications as well as one eye with IOL silicone oil droplet accumulation...
May 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28495299/a-randomized-comparison-of-a-novel-nitinol-frame-low-dose-copper-intrauterine-contraceptive-and-a-copper-t380s-intrauterine-contraceptive
#12
Matthew F Reeves, Bob H Katz, Juan M Canela, Mark J Hathaway, Michael G Tal
OBJECTIVE: We sought to compare VeraCept (VC175), a novel nitinol intrauterine contraceptive (IUC) with 175 square-mm of copper surface area, to a copper T380S IUC. STUDY DESIGN: We enrolled parous women into a randomized subject-blinded comparison of VC175 and a copper T380S in a 2:1 fashion at a single clinic. The primary outcomes were total adverse events and continuation at 12 months. We also examined pain on insertion, ease of placement, expulsion, tolerability and pregnancy...
May 8, 2017: Contraception
https://www.readbyqxmd.com/read/28482528/biocompatibility-of-hydroxyapatite-coatings-deposited-by-pulse-electrodeposition-technique-on-the-nitinol-superelastic-alloy
#13
F Marashi-Najafi, J Khalil-Allafi, M R Etminanfar
The present study deals with pulse electrochemical deposition of HA on NiTi alloy and in vitro evaluation of coatings. At first step, a thermo-chemical surface modification process was applied to control the Ni release of the alloy. The electrochemical deposition of CaP coatings was examined at both dilute and concentrated solutions. The morphology and the composition of coatings were studied using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Plate like and needle like morphologies were formed for dilute and concentrated solution respectively and HA phase was formed by increasing the pulse current density for both electrolyte...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28471091/superb-final-3-year-outcomes-using-interwoven-nitinol-biomimetic-supera-stent
#14
Lawrence A Garcia, Kenneth R Rosenfield, Christopher D Metzger, Frank Zidar, Ashish Pershad, Jeffrey J Popma, Margo Zaugg, Michael R Jaff
IMPORTANCE: Long-term outcomes of an interwoven nitinol stent design represent the best in class for treatment of lower limb arterial obstructive disease METHODS: The subjects were enrolled in an open single arm study comparing the outcomes to an FDA mandated objective performance goal (OPG). RESULTS: About 325 patients (264 intention-to-treat and 64 roll-in subjects) were enrolled. Mean follow-up period was 887+/- 352 days. Treated lesion lengths were 7.8 cm ± 4...
May 4, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28470391/continuously-grooved-stent-struts-for-enhanced-endothelial-cell-seeding
#15
Marja Ter Meer, Willeke F Daamen, Yvonne L Hoogeveen, Gijs J F van Son, Jeremy E Schaffer, J Adam van der Vliet, Leo J Schultze Kool, Lambertus P van den Heuvel
PURPOSE: Implantation of pre-endothelialized stents could enhance cellular recovery of a damaged vessel wall provided attached cells remain viable, functional and are present in sufficient numbers after deployment. The purpose of this study was to evaluate the feasibility of grooved stainless steel (SS) stents as a primary endothelial cell (EC) carrier with potentially enhanced EC protection upon stent deployment. MATERIALS AND METHODS: Attachment and behavior of enzymatically harvested human adult venous ECs seeded onto gelatin-coated vascular stents were evaluated in an in vitro setting...
May 3, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28452874/a-retrievable-rescue-stent-graft-and-radiofrequency-positioning-for-rapid-control-of-noncompressible-hemorrhage
#16
Youngjae Chun, Sung Kwon Cho, William C Clark, William R Wagner, Xinzhu Gu, Amit D Tevar, Ryan M McEnaney
BACKGROUND: Non-compressible hemorrhage of the torso remains a challenging surgical dilemma. Stent graft repair requires endovascular expertise, imaging, and inventory that are not available within the critical window of massive hemorrhage. We developed a retrievable stent graft for rapid hemorrhage. We further investigated a radiofrequency (RF) positioning approach as a possible alternative to the logistics of fluoroscopy. METHODS: A retrievable stent graft was constructed with a novel "petal and stem" design from nitinol and covered with a sleeve of electrospun polyurethane...
April 27, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28449479/early-results-of-the-sorin-%C3%A2-perceval-s-sutureless-valve-systematic-review-and-meta-analysis
#17
Karan Sian, Sheila Li, Daneish Selvakumar, Ross Mejia
BACKGROUND: Minimally invasive aortic valve replacement (MAVR) has demonstrated a benefit with respect to increased patient satisfaction due to minimised pain and earlier recovery. Sutureless valves may benefit MAVR and conventional aortic valve replacement (AVR) by reducing operative times and blood transfusion requirements. The Perceval valve (Sorin, Salluggia, Italy) is a self-expanding prosthesis made from bovine pericardium mounted in a nitinol stent, designed to simplify the implantation of an aortic valve...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28438895/the-casper-carotid-artery-stent-a-unique-all-metal-micromesh-stent-designed-to-prevent-embolic-release
#18
Orlando Diaz, Gloria Lopez, John O F Roehm, Ginna De la Rosa, Fernando Orozco, Rafael Almeida
BACKGROUND: Stroke due to the release of embolic debris during the placement of a stent to correct carotid artery stenosis is a constant procedural and peri-procedural threat. The new all metal Casper stent has been created with two layers of nitinol, the inner layer of which has pores diminutive enough to prevent embolic release. OBJECTIVE: To evaluate the safety, effectiveness, and utility of the double layer nitinol Casper carotid artery stent in the treatment of patients with severe carotid artery stenosis...
April 24, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28436316/first-in-man-experience-of-self-expanding-nitinol-stents-combined-with-drug-coated-balloon-in-the-treatment-of-femoropopliteal-occlusive-disease
#19
Bibombe Patrice Mwipatayi, Kalpa Perera, Ali Daneshmand, Rhys Daniel, Jackie Wong, Shannon D Thomas, Sally A Burrows
Purpose The present study aimed to determine the safety and efficacy of a drug-coated balloon inflated within a thin-strut self-expanding bare-metal stent in patients with severe and complex femoropopliteal occlusive disease. Methods This prospective study used the Pulsar-self-expanding stent and Passeo-18 Lux drug-coated balloon in patients with severe and complex femoropopliteal occlusive disease. The primary endpoint was the 12-month primary patency, and the secondary endpoints included 24-month primary patency, assisted primary patency, secondary patency, and clinically associated target lesion revascularisation...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/28430904/catheter-based-tricuspid-valve-replacement-first-experimental-data-of-a-newly-designed-bileaflet-stent-graft-prosthesis%C3%A2
#20
Henning F Lausberg, Rafal Gryszkiewicz, Maximilian Kuetting, Moritz Baumgaertner, Marcos Centola, Hans-Peter Wendel, Martina Nowak-Machen, David Schibilsky, Tobias Kruger, Christian Schlensak
OBJECTIVES: Moderate or severe degree tricuspid valve regurgitation (TVR) is associated with high rates of morbidity and mortality. Surgical correction as the only therapeutic option offers unsatisfactory results. Recently, several interventional procedures have been introduced clinically in a limited cohort. We present our initial experiments with an innovative interventional valved stent graft for treatment of TVR. METHODS: A newly designed porcine pericardium-covered nitinol stent graft with a lateral bicuspid valve was adapted to size in a cadaver study...
April 18, 2017: European Journal of Cardio-thoracic Surgery
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