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Scaffold stent

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https://www.readbyqxmd.com/read/29774520/implantation-of-bioresorbable-scaffolds-under-guidance-of-optical-coherence-tomography-feasibility-and-pilot-clinical-results-of-a-systematic-protocol
#1
Juan Luis Gutiérrez-Chico, Carlos Cortés, Michele Schincariol, Ula Limon, Meric Yalcinli, María-Alexandra Durán-Cortés, Milosz Jaguszewski
BACKGROUND: We hypothesise that a comprehensive optical coherence tomography (OCT)-guided implantation protocol for bioresorbable scaffolds (BRS) might improve expansion and apposition, thus translating into better clinical outcomes, particularly reducing thrombotic events. METHODS: Patients considered suitable for BRS therapy in de novo coronary lesions underwent OCT. The predominant type of plaque was classified as lipidic, fibrous or calcific, undergoing tailored plaque preparation accordingly...
May 18, 2018: Cardiology Journal
https://www.readbyqxmd.com/read/29749038/vascular-differentiation-from-pluripotent-stem-cells-in-3-d-auxetic-scaffolds
#2
Liqing Song, Mohammad Faisal Ahmed, Yan Li, Changchun Zeng, Yan Li
Auxetic scaffolds, i.e. scaffolds that can display negative Poisson's ratio, have unique physical properties and can expand transversally when axially strained or contract under compression. Auxetic materials have been used for bioprostheses and artery stents due to the enhanced compressive strength and shear stiffness. In vascular tissue engineering, auxetic scaffolds allow the widening of blood vessels when blood flows through (creating compressive stress) to prevent the blockage. However, the influence of auxetic materials on the cellular fate decision in local environment is unclear...
May 10, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29743023/three-years-outcomes-of-diabetic-patients-treated-with-coronary-bioresorbable-scaffolds
#3
Remzi Anadol, Katharina Schnitzler, Liv Lorenz, Melissa Weissner, Helen Ullrich, Alberto Polimeni, Thomas Münzel, Tommaso Gori
BACKGROUND: Diabetes is among the strongest predictors of outcome after coronary artery stenting and the incidence of negative outcomes is still high in this specific group. Data of long-term outcomes comparing diabetic patients with non-diabetic patients treated with bioresorbable scaffolds are still incomplete. This work evaluates the long-term outcomes after implantation of a coronary bioresorbable scaffold (BRS) in diabetic patients compared to non-diabetics. METHODS: Patients who received at least one Absorb BRS in the time of May 2012 to December 2014 were enrolled into this single-center registry...
May 10, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29742143/mid-term-outcomes-of-the-absorb-bvs-versus-second-generation-des-a-systematic-review-and-meta-analysis
#4
Cordula M Felix, Victor J van den Berg, Sanne E Hoeks, Jiang Ming Fam, Mattie Lenzen, Eric Boersma, Peter C Smits, Patrick W Serruys, Yoshinobu Onuma, Robert Jan M van Geuns
BACKGROUND: Bioresorbable Vascular Scaffolds (BVS) were introduced to overcome some of the limitations of drug-eluting stent (DES) for PCI. Data regarding the clinical outcomes of the BVS versus DES beyond 2 years are emerging. OBJECTIVE: To study mid-term outcomes. METHODS: We searched online databases (PubMed/Medline, Embase, CENTRAL), several websites, meeting presentations and scientific session abstracts until August 8th, 2017 for studies comparing Absorb BVS with second-generation DES...
2018: PloS One
https://www.readbyqxmd.com/read/29741484/comparison-of-acute-thrombogenicity-for-magnesium-versus-stainless-steel-stents-in-a-porcine-arteriovenous-shunt-model
#5
Michael J Lipinski, Eduardo Acampado, Qi Cheng, Lila Adams, Sho Torii, Jiaxiang Gai, Rebecca Torguson, David G Hellinga, Michael Joner, Claus Harder, Philine Zumstein, Aloke V Finn, Frank D Kolodgie, Renu Virmani, Ron Waksman
Aims The aetiology for reduced thrombogenicity of the Magmaris resorbable magnesium scaffold (RMS) when compared with the Absorb bioresorbable vascular scaffold remains unclear. We therefore investigated whether the Magmaris RMS has platelet-repelling properties by comparing its acute thrombogenicity with an equivalent stainless steel stent in an arteriovenous shunt model. Methods and Results An ex vivo porcine carotid jugular arteriovenous shunt was established and connected to Sylgard tubing containing the Magmaris RMS with sirolimus-eluting PLLA coating and an equivalent 316L stainless steel stent with sirolimus-eluting PLLA coating...
May 8, 2018: EuroIntervention
https://www.readbyqxmd.com/read/29735265/a-quantitative-study-on-magnesium-alloy-stent-biodegradation
#6
Yuanming Gao, Lizhen Wang, Xuenan Gu, Zhaowei Chu, Meng Guo, Yubo Fan
Insufficient scaffolding time in the process of rapid corrosion is the main problem of magnesium alloy stent (MAS). Finite element method had been used to investigate corrosion of MAS. However, related researches mostly described all elements suffered corrosion in view of one-dimensional corrosion. Multi-dimensional corrosions significantly influence mechanical integrity of MAS structures such as edges and corners. In this study, the effects of multi-dimensional corrosion were studied using experiment quantitatively, then a phenomenological corrosion model was developed to consider these effects...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29732926/imaging-guided-pre-dilatation-stenting-post-dilatation-ipsp-a-protocolized-approach-highlighting-the-importance-of-intravascular-imaging-for-implantation-of-bioresorbable-scaffolds
#7
Ziad A Ali, Keyvan Karimi Galougahi, Richard Shlofmitz, Akiko Maehara, Gary S Mintz, Alexandre Abizaid, Daniel Chamié, Jonathan Hill, Patrick W Serruys, Yoshinobu Onuma, Gregg W Stone
The advent of the fully bioresorbable vascular scaffold (BVS) is the latest step in a series of advancements in the design of intracoronary stents over the past few decades. The novelty of this technology is in providing temporary vessel scaffolding and local antiproliferative therapy to prevent neointimal hyperplasia after percutaneous coronary intervention followed by gradual resorption of the scaffold to restore the native vessel anatomy and physiology-a process termed vascular reparative therapy. Areas covered: The first generation of BVS has not been able to fully match the high benchmark in safety and efficacy set by contemporary metallic drug-eluting stents...
May 7, 2018: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/29721495/current-strategies-for-the-manufacture-of-small-size-tissue-engineering-vascular-grafts
#8
REVIEW
Michele Carrabba, Paolo Madeddu
Occlusive arterial disease, including coronary heart disease (CHD) and peripheral arterial disease (PAD), is the main cause of death, with an annual mortality incidence predicted to rise to 23.3 million worldwide by 2030. Current revascularization techniques consist of angioplasty, placement of a stent, or surgical bypass grafting. Autologous vessels, such as the saphenous vein and internal thoracic artery, represent the gold standard grafts for small-diameter vessels. However, they require invasive harvesting and are often unavailable...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29716478/bidirectional-transradial-and-transfemoral-approach-for-stent-assisted-coil-embolization-of-right-subclavian-artery-saccular-aneurysm
#9
Jin Kyung Oh, Jae-Hwan Lee
Subclavian artery aneurysms are rare lesions that usually require treatment for complications. Bidirectional stent-assisted coil embolization is the most effective treatment of complex wide-necked aneurysms. The stents provide a rigid scaffold that allows coil deposition with reduced risk of coil herniation into the parent vessel lumen. Bidirectional transradial and transfemoral approaches contribute to stable procedure. We report a successful bidirectional stent-assisted coil embolization of a saccular aneurysm of the subclavian artery as an alternative to stent graft implantation to diminish the risk of right vertebral artery occlusion...
January 1, 2018: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29715170/treatment-of-diffuse-right-coronary-aneurysmal-disease-with-standard-drug-eluting-stent-scaffolding-of-polytetrafluoroethylene-covered-stents
#10
Jeffrey Rossi, Terence Hill, Jaikirshan Khatri
Demonstration of a novel technique to safely exclude long aneurysmal segments that require multiple covered stents in a single segment. In addition, these images and video series demonstrate the usefulness of balloon-assisted GuideLiner tracking to pass bulky equipment to the distal segments of heavily diseased vessels.
May 2018: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/29704312/self-expandable-tubular-collagen-implants
#11
Luuk R M Versteegden, Marja Ter Meer, Roger M L M Lomme, J Adam van der Vliet, Leo J Schultze Kool, Toin H van Kuppevelt, Willeke F Daamen
Collagen has been extensively used as a biomaterial, yet for tubular organ repair synthetic polymers or metals (e.g. stents) are typically used. In this study we report a novel type of tubular implant solely consisting of type I collagen, suitable to self-expand in case of minimal invasive implantation. Potential benefits of this collagen scaffold over conventional materials include improved endothelialization, biodegradation over time and possibilities to add bioactive components to the scaffold, such as anti-coagulants...
April 28, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29699747/meta-analysis-comparing-outcomes-after-everolimus-eluting-bioresorbable-vascular-scaffolds-versus-everolimus-eluting-metallic-stents-in-patients-with-acute-coronary-syndromes
#12
Roberta De Rosa, Angelo Silverio, Attilio Varricchio, Giuseppe De Luca, Marco Di Maio, Ilaria Radano, Marta Belmonte, Maria Carmen De Angelis, Elisabetta Moscarella, Rodolfo Citro, Federico Piscione, Gennaro Galasso
Acute coronary syndromes (ACS) may represent an intriguing clinical scenario for implantation of bioresorbable vascular scaffold (BRS). Nevertheless, the knowledge about the performance of these devices in patients with ACS is limited. Therefore, we performed a meta-analysis of clinical studies aiming to assess the safety and efficacy of everolimus-eluting-BRS versus everolimus-eluting-metallic stents (EES) in ACS patients undergoing percutaneous coronary intervention. Six studies enrolling 2,318 patients were included and analyzed for the risk of primary safety outcome (stent or scaffold thrombosis [ST/ScT]), primary efficacy outcome (target lesion revascularisation [TLR]), and secondary outcomes (myocardial infarction, cardiac death, all-cause death)...
March 27, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29699615/long-term-assessment-of-bioresorbable-coronary-scaffolds-disappearing-stents-reappearing-atherosclerosis
#13
EDITORIAL
Stephan Windecker, Raffaele Piccolo, Yasushi Ueki
No abstract text is available yet for this article.
May 1, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29696533/tirofiban-positively-regulates-%C3%AE-1-integrin-and-favours-endothelial-cell-growth-on-polylactic-acid-biopolymer-vascular-scaffold-bvs
#14
Arturo Giordano, Simona Romano, Nicola Corcione, Giacomo Frati, Giuseppe Biondi Zoccai, Paolo Ferraro, Stefano Messina, Stefano Ottolini, Maria Fiammetta Romano
An unexpectedly high incidence of thrombosis in patients that received the polylactic acid bioresorbable vascular scaffold (BVS) suggests a delayed/incomplete endothelial repair with this stent. The anti-platelet agent tirofiban stimulates endothelial cell migration and proliferation, mediated by VEGF production. We investigated the tirofiban effect on the migration and adhesion of endothelial cells to BVS, in vitro. We performed human umbilical endothelial cell (HUVEC) cultures in the presence of BVS. Tirofiban, similarly to VEGF, increased the ability of HUVEC to grow on the vascular scaffold, compared to unstimulated or abciximab-treated cells...
April 25, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29662897/novel-compliant-scaffold-with-specific-design-for-venous-system-results-of-a-porcine-model-study
#15
Pierfrancesco Veroux, Alessia Giaquinta, Carla Virgilio, Davide Danilo Zani, Giuliano Ravasio, Vincenzo Ardita, Paola Secchiero, Eugenio Scanziani, Paolo Zamboni, Massimiliano Veroux
Background: Stenting has become the first-line treatment of obstructive venous disease because of poor results of balloon angioplasty. This preclinical study aimed to investigate the safety and efficacy profile of a novel compliant venous scaffold (CVS) denominated Petalo CVS, specifically designed for venous diseases. Materials and Methods: Twelve healthy pigs weighing 90 kg were used to test Petalo CVS. The devices were implanted into the internal jugular veins (IJVs) using a femoral vein percutaneous approach...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29661987/review-of-the-latest-percutaneous-devices-in-critical-limb-ischemia
#16
REVIEW
Leila Haghighat, Sophia Elissa Altin, Robert R Attaran, Carlos Mena-Hurtado, Christopher J Regan
Critical limb ischemia (CLI) is a terminal stage of peripheral arterial disease that, in the absence of intervention, may lead to lower extremity amputation or death. Endovascular interventions have become a first-line approach to the management of CLI and have advanced considerably within the past decade. This review summarizes the types of percutaneous devices and the techniques that are available for the management of CLI and the data supporting their use. These include devices that establish and maintain vessel patency, including percutaneous transluminal angioplasty, drug-coated balloons, bare metal stents, drug-eluting stents, bioresorbable vascular scaffolds, and atherectomy; devices that provide protection from embolization; and, cell-based therapies...
April 14, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29656280/real-world-bioresorbable-vascular-scaffold-experience-compared-with-second-generation-metallic-drug-eluting-stents-in-complex-coronary-lesions
#17
Naotaka Okamoto, Hiroshi Ueda, Takahiro Yoshimura, Surbhi Chamaria, Samit Bhatheja, Yuliya Vengrenyuk, Samaneh Rabiei, Yonandy Barrientos, Vishal Kapur, Nitin Barman, Joseph Sweeny, Usman Baber, Roxana Mehran, Samin K Sharma, Annapoorna S Kini
OBJECTIVES: The aim of the study was to compare the acute outcomes of Absorb bioresorbable vascular scaffolds (BVS) and second-generation drug-eluting stent (DES) implantation in routine clinical practice. There is a paucity of data regarding BVS use in a real-world patient population. METHODS: The study population comprised 40 consecutive patients who underwent percutaneous coronary intervention (PCI) with BVS implantation at a tertiary-care center in New York, New York between July and December of 2016...
April 15, 2018: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/29649071/predictors-of-early-scaffold-thrombosis-results-from-the-multicenter-prospective-german-austrian-absorb-registry
#18
Jochen Wöhrle, Holger M Nef, Christoph Naber, Stephan Achenbach, Thomas Riemer, Julinda Mehilli, Thomas Münzel, Steffen Schneider, Sinisa Markovic, Julia Seeger, Wolfgang Rottbauer, Thomas Pfannebecker, Gert Richardt, Ralf Zahn, Tommaso Gori, Johannes Kastner, Axel Schmermund, Christian W Hamm
BACKGROUND: In randomized clinical trials, the risk of thrombotic events with the absorb bioresorbable vascular scaffold (BVS) was significantly higher than with metallic drug-eluting stents. We evaluated predictors of scaffold thrombosis in the large-scale, multicenter German-Austrian ABSORB RegIstRy. METHODS AND RESULTS: 3178 patients with treatment of 4252 lesions using 5020 scaffolds were included. Follow-up rate at 6 months was 97.4%. Forty-five (1.42%) patients experienced definite/probable scaffold thrombosis during follow-up...
April 11, 2018: Coronary Artery Disease
https://www.readbyqxmd.com/read/29629708/dipyridamole-loaded-biodegradable-pla-nanoplatforms-as-coatings-for-cardiovascular-stents
#19
Veroniki Bakola, Varvara Karagkiozaki, Aikatherini-Rafailia Tsiapla, Foteini Pappa, Ioannis Moutsios, Eleni Pavlidou, Stergious Logothetidis
Cardiovascular Stents are commonly used for the treatment of Cardiovascular Diseases (CVDs) that in developed societies, are the most frequent causes of mortality and morbidity. Recent years, thorough research and development of Drug Eluting Stents (DES) has been done, with emphasis on coronary stenting to avoid the most common complication, the in-stent thrombosis. Dipyridamole (DPM) is a medication that inhibits blood clot formation. Drug Delivery Nanoplatforms consisting of biodegradable polymers can be fabricated via Electrospinning Deposition, known for its cost-effective and versatile advantages, that produces fibrous scaffolds able of sustainable and controllable drug release...
April 9, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29627909/technological-advances-in-stent-therapies-a-year-in-review
#20
REVIEW
Jad Raffoul, Ammar Nasir, Andrew J P Klein
Stent technology has rapidly evolved since the first stainless steel bare metal stents with substantial developments in scaffolding, polymer, drug choice, drug delivery, and elution mechanisms. Most recently, there has been the evolution of bioabsorbable vascular scaffolds, potentially eliminating the need for long-term foreign object retention. These rapid developments have led to an ever-expanding selection of new stents, making the choice of which to use in which patient challenging. Operators must balance potential short- and long-term clinical ramifications, namely stent thrombosis, in-stent restenosis, target lesion revascularization, and target lesion failure...
April 7, 2018: Current Treatment Options in Cardiovascular Medicine
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