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https://www.readbyqxmd.com/read/28526560/limb-flexion-induced-axial-compression-and-bending-in-human-femoropopliteal-artery-segments
#1
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
#2
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
#3
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
#4
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
#5
Matthew F Reeves, Bob 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 12months. 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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/28428652/percutaneous-stent-placement-for-the-treatment-of-malignant-biliary-obstruction-nitinol-versus-elgiloy-stents
#14
Charles Edouard Zurstrassen, Almir Galvão Vieira Bitencourt, Marcos Duarte Guimaraes, Aline Cristine Barbosa Santos Cavalcante, Chiang Jeng Tyng, Mauricio Kauark Amoedo, João Paulo Kawaoka Matsushita Junior, Janio Szklaruk, Edson Marchiori, Rubens Chojniak
OBJECTIVE: This study aimed to compare two self-expanding stents, a nitinol stent and an elgiloy stent, both placed percutaneously, in terms of their efficacy in palliating inoperable malignant biliary obstruction. MATERIALS AND METHODS: We retrospectively investigated 99 patients with unresectable malignant biliary obstruction treated with percutaneous placement of a self-expanding metallic stent at our institution between May 2007 and January 2010. Serum bilirubin and liver enzyme levels were measured before and 30 days after stenting...
March 2017: Radiologia Brasileira
https://www.readbyqxmd.com/read/28424038/a-novel-method-for-the-treatment-of-bilateral-hypogastric-aneurysms-using-hybrid-polytetrafluoroethylene-graft
#15
Sam Tyagi, D Pineda, H Zheng, M Dougherty, K Calligaro, D Troutman
Open aortic aneurysm repair in the setting of bilateral hypogastric aneurysms is technically challenging. We present a novel technique for open surgical repair for bilateral hypogastric aneurysms using the Gore hybrid vascular graft (GVHG; W. L. Gore and Associates Inc, Flagstaff, Arizona). The GVHG is an expanded polytetrafluoroethylene graft with a nitinol stent at 1 end designed for hemodialysis access. The GVHG has been also been used for aortic debranching and treatment of occlusive disease. We describe the first report using GVHG to repair hypogastric aneurysms...
May 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28419788/the-italian-stallions-of-cli-value-care-delivery
#16
EDITORIAL
Gary M Ansel, Michael R Jaff
Critical Limb ischemia with long segment occlusive disease typically reserved for surgery can be treated with a high degree of success in expert centers via an endovascular approach Nitinol woven stents appear to have high patency with proper deployment in all PAD groups Increased early expense that is associated with decreased re-intervention can be cost effective.
April 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28411099/robot-assisted-transplanted-ureteral-stricture-management
#17
H M Abdul-Muhsin, S B McAdams, R N Nuñez, N N Katariya, E P Castle
OBJECTIVE: To assess the feasibility of robot assisted transplanted ureteral reimplantation as a minimally invasive alternative to open surgery. MATERIAL AND METHODS: Between August 2015 and March 2016, five patients presented with transplanted ureteral strictures after failure of previous endoscopic management. All patients underwent robot assisted ureteral reimplantation. Patients' demographics, perioperative outcomes and complications are reported. RESULTS: All patients presented with deterioration of kidney function with or without recurrent urinary tract infection...
April 11, 2017: Urology
https://www.readbyqxmd.com/read/28389291/a-word-of-caution-for-extra-large-self-expandable-nitinol-stents
#18
Andrés Reyes Valdivia, Africa Duque Santos, Francisco Alvarez Marcos, Asunción Romero Lozano, Julia Ocaña Guaita, Claudio Gandarias Zúñiga
PURPOSE: To report an unsuccessful use of large nitinol stent to prevent proximal endoleak in endograft treatment for juxtarenal aortic aneurysm. CASE REPORT: Male of 82 years old, with coronary disease and severe chronic obstructive pulmonary disease (COPD) requiring oxygen support. A large 80 mm. juxtarenal aneurysm was found on routine urological examination. Neck features were as follows: 7mm and high anterior-posterior angulation. ASA IV was given. Patient wanted to be treated...
April 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28377911/distal-femoral-arteriovenous-fistula-with-iliac-vein-thrombosis-after-blunt-trauma
#19
Duk Sil Kim, Sung Wan Kim, Hyun Seok Lee, Kyung Hwan Byun, Michael SungPil Choe
A 39-year-old woman arrived at our emergency department, complaining of severe pain and swelling of her left leg. She had slipped down stairs and injured on her left leg about 3 months ago. Computed tomography angiography showed left distal superficial femoral artery's pseudoaneurysm with arteriovenous fistula and thrombotic occlusion of left common iliac vein. We decided to do endovascular intervention due to severe venous hypertension and chronic inflammation around the fistula. The femoral arteriovenous fistula was closed via stent-graft (7 mm×5, 9 mm×5 cm) deployment...
March 2017: Vascular Specialist International
https://www.readbyqxmd.com/read/28372983/primary-stenting-of-the-superficial-femoral-artery-in-intermittent-claudication-improves-health-related-quality-of-life-abi-and-walking-distance-12-month-results-of-a-controlled-randomised-multicentre-trial
#20
H Lindgren, P Qvarfordt, M Åkesson, S Bergman, A Gottsäter
BACKGROUND: Invasive treatment of intermittent claudication (IC) because of severe atherosclerotic stenosis or occlusion in the superficial femoral artery (SFA) is controversial. This prospective randomised trial was performed to assess the impact on health related quality of life (HRQoL) of primary stenting with nitinol self expanding stents compared with best medical treatment alone in patients suffering from stable IC due to SFA disease. METHODS: One hundred patients with stable IC caused by SFA disease from seven Swedish hospitals treated with best medical treatment (BMT) were randomised to either the stent (n = 48) or the control (n = 52) group...
March 31, 2017: European Journal of Vascular and Endovascular Surgery
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