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Biodegradable polymer stent

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https://www.readbyqxmd.com/read/28716610/current-status-and-future-direction-of-biodegradable-metallic-and-polymeric-vascular-scaffolds-for-next-generation-stents
#1
REVIEW
Seung Hyuk Im, Youngmee Jung, Soo Hyun Kim
Because of the increasing incidence of coronary artery disease, the importance of cardiovascular stents has continuously increased as a treatment of this disease. Biodegradable scaffolds fabricated from polymers and metals have emerged as promising materials for vascular stents because of their biodegradability. Although such stent framework materials have shown good clinical efficacy, it is difficult to decide whether polymers or metals are better vascular scaffolds because their properties are different. Therefore, there are still obstacles in the development of biodegradable vascular scaffolds in terms of improving clinical efficacy...
July 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28700502/adverse-cardiovascular-events-associated-with-biodegradable-polymer-drug-eluting-stents-and-durable-polymer-everolimus-eluting-stents-a-systematic-review-and-meta-analysis-of-10-randomized-controlled-trials
#2
Pravesh Kumar Bundhun, Girish Janoo, Chandra Mouli Yanamala, Feng Huang
BACKGROUND: Controversies have been observed among network meta-analyses comparing biodegradable polymer drug-eluting stents (BP-DES) with durable polymer drug-eluting stents (DP-DES). We aimed to compare the adverse cardiovascular events associated with BP-DES and durable polymer everolimus-eluting stents (DP-EES) using a large number of patients obtained from randomized controlled trials (RCTs). METHODS: Electronic databases were searched for randomized trials comparing BP-DES with DP-EES...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28647315/safety-and-efficacy-of-new-biodegradable-polymer-based-sirolimus-eluting-stents-in-a-preclinical-model
#3
Armando Pérez de Prado, Claudia Pérez Martínez, Carlos Cuellas Ramón, Marta Regueiro Purriños, María López Benito, José Manuel Gonzalo Orden, José Antonio Rodríguez Altónaga, Rodrigo Estévez Loureiro, Tomás Benito González, David Viñuela Baragaño, María Molina Crisol, Marc Amorós Aguilar, Isabel Pérez Serranos, Arnau Vidal Parreu, Ana Benavides Montegordo, Luis Duocastella Codina, Felipe Fernández Vázquez
INTRODUCTION AND OBJECTIVES: New drug-eluting stents (DES) designed to overcome the limitations of existing devices should initially be tested in preclinical studies. Our objective was to analyze the safety and efficacy of new biodegradable polymer-based DES compared with bare-metal stents (BMS) and commercially available DES in a model of normal porcine coronary arteries. METHODS: We randomly implanted 101 stents (BMS and biodegradable polymer-based sirolimus-eluting stents: 3 test stent iterations [BD1, BD2, and BD3], Orsiro, Biomime and Biomatrix) in the coronary arteries of 34 domestic pigs...
June 21, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28641838/dual-antiplatelet-therapy-for-6-versus-18%C3%A2-months-after-biodegradable-polymer-drug-eluting-stent-implantation
#4
Masato Nakamura, Raisuke Iijima, Junya Ako, Toshiro Shinke, Hisayuki Okada, Yoshiaki Ito, Kenji Ando, Hitoshi Anzai, Hiroyuki Tanaka, Yasunori Ueda, Shin Takiuchi, Yasunori Nishida, Hiroshi Ohira, Katsuhiro Kawaguchi, Makoto Kadotani, Hiroyuki Niinuma, Kazuto Omiya, Takashi Morita, Kan Zen, Yoshinori Yasaka, Kenji Inoue, Sugao Ishiwata, Masahiko Ochiai, Toshimitsu Hamasaki, Hiroyoshi Yokoi
OBJECTIVES: The NIPPON (Nobori Dual Antiplatelet Therapy as Appropriate Duration) study was a multicenter randomized investigation of the noninferiority of short-term versus long-term dual antiplatelet therapy (DAPT) in patients with implantation of the Nobori drug-eluting stent (DES) (Terumo, Tokyo, Japan), which has a biodegradable abluminal coating. BACKGROUND: The optimum duration of DAPT for patients with a biodegradable polymer-coated DES is unclear. METHODS: The subjects were 3,773 patients with stable or acute coronary syndromes undergoing Nobori stent implantation...
June 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28597804/effect-of-biodegradable-polymer-drug-eluting-stents-versus-biocompatible-polymer-everolimus-eluting-stents-a-meta-analysis
#5
Yong-Zhi Shang, Bao-Yin Li, Yan Feng, Jie-Yun Liu, Xiu-Ling Yang, Lei Qin
OBJECTIVE: Biocompatible polymer everolimus-eluting stents (EES) are associated with risk of stent thrombosis (ST); biodegradable polymer drug-eluting stents (BP-DES) were designed to reduce these risks. However, the long-term benefits are not completely clear. METHOD: We undertook a meta-analysis of randomized studies identified in systematic searches of MEDLINE, EMBASE, and the Cochrane Database. Primary outcome was the risk of ST. RESULTS: Twelve studies (11,692 patients) were included...
April 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28589916/design-and-fabrication-of-novel-polymeric-biodegradable-stents-for-small-caliber-blood-vessels-by-computer-aided-wet-spinning
#6
D Puppi, A Pirosa, G Lupi, P A Erba, G Giachi, F Chiellini
Biodegradable stents have emerged as one of the most promising approaches in obstructive cardiovascular disease treatment due to their potential in providing mechanical support while it is needed and then leaving behind only the healed natural vessel. The aim of this study was to develop polymeric biodegradable stents for application in small caliber blood vessels. Poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate] (PHBHHx), a renewable microbial aliphatic polyester, and poly(ε-caprolactone), a synthetic polyester approved by the US Food and Drug Administration for different biomedical applications, were investigated as suitable polymers for stent development...
June 7, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28579236/biodegradable-polymer-biolimus-eluting-stents-versus-durable-polymer-everolimus-eluting-stents-in-patients-with%C3%A2-coronary-artery-disease-final-5-year-report-from-the-compare-ii-trial-abluminal%C3%A2-biodegradable-polymer-biolimus-eluting-stent-versus-durable-polymer
#7
Georgios J Vlachojannis, Pieter C Smits, Sjoerd H Hofma, Mario Togni, Nicolás Vázquez, Mariano Valdés, Vassilis Voudris, Ton Slagboom, Jean-Jaques Goy, Peter den Heijer, Martin van der Ent
OBJECTIVES: This analysis investigates the 5-year outcomes of the biodegradable polymer biolimus-eluting stent (BP-BES) and durable polymer everolimus-eluting stent (DP-EES) in an all-comers population undergoing percutaneous coronary intervention. BACKGROUND: Recent 1- and 3-year results from randomized trials have indicated similar safety and efficacy outcomes of BP-BES and DP-EES. Whether benefits of the biodegradable polymer device arise over longer follow-up is unknown...
May 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28576000/the-effect-of-solvents-and-hydrophilic-additive-on-stable-coating-and-controllable-sirolimus-release-system-for-drug-eluting-stent
#8
Seong Min Kim, Sung-Bin Park, Tarek M Bedair, Man-Ho Kim, Bang Ju Park, Yoon Ki Joung, Dong Keun Han
Various drug-eluting stents (DESs) have been developed to prevent restenosis after stent implantation. However, DES still needs to improve the drug-in-polymer coating stability and control of drug release for effective clinical treatment. In this study, the cobalt-chromium (CoCr) alloy surface was coated with biodegradable poly(D,L-lactide) (PDLLA) and sirolimus (SRL) mixed with hydrophilic Pluronic F127 additive by using ultrasonic spray coating system in order to achieve a stable coating surface and control SRL release...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28544186/safety-and-efficacy-outcomes-of-3rd-generation-des-in-an-all-comer-population-of-patients-undergoing-pci-12-month-and-24-month-results-of-the-e-biomatrix-french-registry
#9
Eric Maupas, Janusz Lipiecki, Raphy Levy, Benjamin Faurie, Bernard Karsenty, Marc Eric Moulichon, François Brunelle, Luc Maillard, Fabien de Poli, Thierry Lefèvre
OBJECTIVES: The French Ebiomatrix registry aimed to confirm the results of the Leaders trial in an all-comer population in France. BACKGROUND: The Leaders trial showed the Biolimus-eluting-sent (BES) to be equivalent to the Cypher stent in terms of safety and efficacy at 1 year and superior regarding stent thrombosis after 1 year. METHODS: BES recipients were enrolled in 42 French centers with up to 24-month clinical follow up. RESULTS: 2365 patients were included...
May 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28544146/real-life-clinical-outcomes-with-everolimus-eluting-platinum-chromium-stent-with-an-abluminal-biodegradable-polymer-in-patients-from-the-swedish-coronary-angiography-and-angioplasty-registry-scaar
#10
Giovanna Sarno, Bo Lagerqvist, Göran Olivecrona, Christoph Varenhorst, Mikael Danielewicz, Kristina Hambraeus, Daniel Lindholm, Truls Råmunddal, Nils Witt, Stefan James
BACKGROUND: No previous studies have evaluated the performance of the Synergy stent in a large real-life population. OBJECTIVES: To describe the initial real-life experience with a novel everolimus eluting platinum chromium stent with abluminal biodegradable polymer (SYNERGY) in unselected patients from a nationwide registry. METHODS: All implanted Synergy stents were compared with other new generation drug eluting stents (n-DES) with >1,000 implantations in Sweden between March 2013 and October 2015...
May 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28536015/two-year-vascular-responses-to-drug-eluting-stents-with-biodegradable-polymer-versus-durable-polymer-an-optical-coherence-tomography-sub-study-of-the-next
#11
Yosuke Katayama, Takashi Kubo, Takashi Akasaka, Yasushi Ino, Kazuo Kimura, Hiroyuki Okura, Toshiro Shinke, Keiichi Igarashi, Kazushige Kadota, Ken Kozuma, Kengo Tanabe, Yoshihisa Nakagawa, Toshiya Muramatsu, Yoshihiro Morino, Takeshi Kimura
BACKGROUND: This study aimed to compare very late vascular response after stent implantation between everolimus-eluting stent (EES) with a thin, non-adhesive, durable, biocompatible fluorinated polymer and biolimus-eluting stent (BES) with a biodegradable polymer by optical coherence tomography (OCT). METHODS AND RESULTS: In the NOBORI-BES Versus XIENCE V/PROMUS-EES Trial (NEXT), a formal OCT substudy investigated 48 patients (27 EES-treated lesions in 23 patients and 28 BES-treated lesions in 25 patients) with 2-year (18-30 months) follow-up imaging at 18 centers...
May 20, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28512069/optical-coherence-tomography-findings-insights-from-the-randomised-multicentre-trial-investigating-angiographic-outcomes-of-hybrid-sirolimus-eluting-stents-with-biodegradable-polymer-compared-with-everolimus-eluting-stents-with-durable-polymer-in-chronic-total
#12
Koen Teeuwen, Eva M Spoormans, Johan Bennett, Christophe Dubois, Walter Desmet, Giovanni J Ughi, Ann Belmans, Johannes C Kelder, Jan G P Tijssen, Pierfrancesco Agostoni, Maarten J Suttorp, Tom Adriaenssens
AIMS: The PRISON IV trial investigated the next-generation sirolimus-eluting stent (SES) with ultra-thin struts and biodegradable polymer against the second-generation everolimus-eluting stent (EES) with thin struts and durable polymer in patients with successfully recanalised chronic total occlusions (CTO). In this study, we examined the secondary optical coherence tomography endpoints. METHODS AND RESULTS: The main PRISON IV trial randomised 330 patients to either SES or EES...
May 18, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28472961/erratum-to-third-generation-drug-eluting-stent-des-with-biodegradable-polymer-in-diabetic-patients-5%C3%A2-years-follow-up
#13
Marcus Wiemer, Sinisa Stojkovic, Alexander Samol, Zisis Dimitriadis, Juan M Ruiz-Nodar, Ralf Birkemeyer, Jacques Monsegu, Gérard Finet, David Hildick-Smith, Damras Tresukosol, Enrique Garcia Novo, Jacques J Koolen, Emanuele Barbato, Gian Battista Danzi
No abstract text is available yet for this article.
May 4, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28454794/reduced-duration-of-dual-antiplatelet-therapy-using-an-improved-drug-eluting-stent-for-percutaneous-coronary-intervention-of-the-left-main-artery-in-a-real-world-all-comer-population-rationale-and-study-design-of-the-prospective-randomized-multicenter-ideal
#14
RANDOMIZED CONTROLLED TRIAL
Miguel E Lemmert, Keith Oldroyd, Paul Barragan, Maciej Lesiak, Robert A Byrne, Evgeny Merkulov, Joost Daemen, Yoshinobu Onuma, Karen Witberg, Robert-Jan van Geuns
BACKGROUND: Continuous improvements in stent technology make percutaneous coronary intervention (PCI) a potential alternative to surgery in selected patients with unprotected left main coronary artery (uLMCA) disease. The optimal duration of dual antiplatelet therapy (DAPT) in these patients remains undetermined, and in addition, new stent designs using a bioabsorbable polymer might allow shorter duration of DAPT. STUDY DESIGN: IDEAL-LM is a prospective, randomized, multicenter study that will enroll 818 patients undergoing uLMCA PCI...
May 2017: American Heart Journal
https://www.readbyqxmd.com/read/28402204/evaluation-of-the-mistent-sustained-sirolimus-eluting-biodegradable-polymer-coated-stent-for-the-treatment-of-coronary-artery-disease-does-uniform-sustained-abluminal-drug-release-result-in-earlier-strut-coverage-and-better-safety-profile
#15
Ruben Y G Tijssen, Robin P Kraak, Huangling Lu, Jeffrey G Mifek, Wenda C Carlyle, Dennis J Donohoe, Robbert J De Winter, Karel T Koch, Joanna J Wykrzykowska
Treatment of coronary artery disease has made strides over the last decades. Development of drug eluting stents (DES), coated with a polymer layer and an anti-proliferative drug to reduce neointimal hyperplasia, has reduced the incidence of in-stent-restenosis relative to treatment with bare metal stents. Patients treated with first generation DES more likely suffer from (very) late events which can be cause by the permanent presence of a polymer. Therefore second generation DES with more biocompatible coatings, and third generation DES, with very thin struts coated with biodegradable polymers, were developed...
April 24, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28397881/a-promising-biodegradable-magnesium-alloy-suitable-for-clinical-vascular-stent-application
#16
Lin Mao, Li Shen, Jiahui Chen, Xiaobo Zhang, Minsuk Kwak, Yu Wu, Rong Fan, Lei Zhang, Jia Pei, Guangyin Yuan, Chengli Song, Junbo Ge, Wenjiang Ding
We report a Mg alloy Mg-2.2Nd-0.1Zn-0.4Zr (wt.%, denoted as JDBM-2) showing great potential in clinical vascular stent application by integrating the advantages of traditional medical stainless steel and polymer. This alloy exhibits high yield strength and elongation of 276 ± 6 MPa and 34.3 ± 3.4% respectively. The JDBM-2 with a stable degradation surface results in a highly homogeneous degradation mechanism and long-term structural and mechanical durability. In vitro cytotoxicity test of the Mg extract via human vascular endothelial cells (HUVECs) indicates that the corrosion products are well tolerated by the tested cells and potentially negligible toxic effect on arterial vessel walls...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28379855/mid-term-outcome-of-biolimus-eluting-stents-with-biodegradable-polymer-results-from-a-multinational-prospective-all-comers-registry
#17
Evgeniy I Kretov, Vitaly I Baystrukov, Marouane Boukhris, Alexey A Prokhorikhin, Igor O Grazhdankin, Farouk Abcha, Alexey V Biryukov, Vladimir V Verin, Dmitriy D Zubarev, Roman A Naydenov, Ivan A Naryshkin, Dmitriy N Ponomarev, Sharaf E Mahmoud, Alfredo R Galassi, Anton A Obedinskiy
BACKGROUND: The Nobori biolimus-eluting stent (BES) is a biodegradable polymer drug-eluting stent (DES). Several studies have shown its noninferiority in comparison with durable polymer DES. AIM: We sought to investigate the efficacy and the safety of Nobori BES in an all-comer population undergoing a percutaneous coronary intervention. PATIENTS AND METHODS: A total of 12 912 patients with 19 947 coronary lesions, undergoing percutaneous coronary intervention with Nobori BES implantation at 200 centres around the world between August 2010 and December 2015, were included in this prospective registry...
April 4, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28322012/3d-printed-multidrug-eluting-stent-from-graphene-nanoplatelet-doped-biodegradable-polymer-composite
#18
Santosh K Misra, Fatemeh Ostadhossein, Ramya Babu, Joseph Kus, Divya Tankasala, Andre Sutrisno, Kathleen A Walsh, Corinne R Bromfield, Dipanjan Pan
Patients with percutaneous coronary intervention generally receive either bare metal stents or drug-eluting stents to restore the normal blood flow. However, due to the lack of stent production with an individual patient in mind, the same level of effectiveness may not be possible in treating two different clinical scenarios. This study introduces for the first time the feasibility of a patient-specific stenting process constructed from direct 3D segmentation of medical images using direct 3D printing of biodegradable polymer-graphene composite with dual drug incorporation...
June 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28318138/safety-and-efficacy-of-6-month-versus-12-month-dual-antiplatelet-therapy-in-patients-after-implantation-of-multiple-biodegradable-polymer-coated-sirolimus-eluting-coronary-stents-insight-from-the-i-love-it-2-trial
#19
RANDOMIZED CONTROLLED TRIAL
Jing Qi, Yi Li, Jing Li, Quanmin Jing, Kai Xu, Chuanyu Gao, Likun Ma, Zhi Zhang, Bo Xu, Yaling Han
OBJECTIVE: This study sought to compare the clinical outcomes of 6-month versus 12-month dual antiplatelet therapy (DAPT) in patients receiving multiple biodegradable polymer-coated sirolimus-eluting stents (BP-SES) implants. BACKGROUND: The clinical outcomes for patients who undergo multiple BP-SES implantation with different DAPT durations are uncertain. METHODS: In the I-LOVE-IT 2 trial, 907 patients treated with multiple BP-SES (total stent number ≥2) were assigned to receive 6-month (n = 440) or 12-month (n = 467) DAPT...
March 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28302466/bioflow-iii-satellite-one-year-clinical-outcomes-of-diabetic-patients-treated-with-a-biodegradable-polymer-sirolimus-eluting-stent-and-comprehensive-medical-surveillance
#20
Ran Kornowski, Ariel Roguin, Haim Danenberg, Hana Vaknin Assa, Eitan Abergel, Eliezer Rozenbaum, Victor Guetta, Uri Landes, Refat Jabara, Amnon Merdler, Amit Segev, Morris Mosseri, Abid Assali
BACKGROUND: Drug-eluting stents with biodegradable polymer might be particularly useful in diabetic patients who are at increased risk for target lesion/target vessel revascularization. We therefore aimed at assessing the safety and performance of a biodegradable polymer sirolimus-eluting stent (BP-SES) in combination with comprehensive optimal medical therapy following coronary interventions. METHODS: This prospective, multicenter registry was conducted at six centers in Israel...
February 21, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
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